Last November I ordered and paid for the Sony A1 II and it is now 3 May 2025 and I am still waiting. I had also decided to purchase a number of appropriate lenses and one of them was the Sony FE 16-35mm F2.8 GM II which I used for the first time today (3 May 2025).
Sony FE 16-35mm F2.8 GM II vs GM I: A Detailed Look for Those Considering an Upgrade
- Introduction: The Evolution of a G Master Wide-Angle Zoom
The arrival of the Sony FE 16-35mm F2.8 GM II (SEL1635GM2) lens represents a significant update to a key lens in Sony’s professional G Master lineup. This Mark II version, released in 2023, replaces the original FE 16-35mm F2.8 GM (SEL1635GM), which was launched back in 2017. It completes the second generation of Sony’s highly regarded F2.8 ‘trinity’ of zoom lenses, joining the FE 24-70mm F2.8 GM II and the FE 70-200mm F2.8 GM OSS II.
This generational update clearly demonstrates Sony’s consistent strategy for its flagship lenses. Across the G Master II series, the company has prioritised several key areas:
Significant reductions in size and weight.
The inclusion of enhanced physical controls, such as dedicated aperture rings.
Substantially upgraded autofocus systems utilising XD Linear Motors.
Meticulous refinements to the optical design aimed at pushing the boundaries of image quality.
The development from the original G Master zooms to their Mark II counterparts highlights Sony’s responsiveness to the demands of professionals for lighter and more versatile tools suitable for modern hybrid photo and video workflows. The consistency across these updates suggests a deliberate move towards a more unified and ergonomically refined professional lens system.
However, the original FE 16-35mm F2.8 GM was, and still is, a highly respected lens, praised for its optical quality and robust build. This sets a high standard and makes the decision to upgrade a complex one for existing owners. Is the Mark II simply a minor improvement, or does it offer compelling enough advantages to justify a significant further investment?
This discussion aims to provide a comprehensive analysis comparing the FE 16-35mm F2.8 GM II with its predecessor. By examining the specific changes in physical design, handling characteristics, optical performance, and autofocus capabilities, and considering insights from professional reviews and user discussions, this analysis will explore the tangible benefits offered by the newer model. Ultimately, it will evaluate the compelling reasons why an owner of the original GM lens might feel the need to upgrade. The following sections will break down the physical modifications, delve into the optical advancements, scrutinise the autofocus overhaul, consider perspectives from reviewers and users, and finally, offer a considered opinion on the upgrade question.
- Downsized Design, Enhanced Handling: Physical Improvements
One of the most immediately noticeable differences between the two generations is their physical size and handling features. The FE 16-35mm F2.8 GM II represents a significant step forward in terms of portability and operational refinement compared to the original.
Significant Size and Weight Reduction
Sony has achieved a notable reduction in the lens’s physical size. The GM II measures 111.5 mm in length, approximately 10 mm shorter than the GM I’s 121.6 mm. Even more significant is the weight difference: the GM II weighs 547 g, a substantial 133 g (around 20%) lighter than the 680 g GM I. This reduction allowed Sony to claim the title of the “world’s smallest and lightest” full-frame F2.8 autofocus 16-35mm zoom lens at the time of its release. When compared to contemporary rivals such as the Canon RF 15-35mm F2.8 L IS USM (840 g) or the Sigma 14-24mm F2.8 DG DN Art (795 g), the GM II’s compactness is particularly evident.
Here’s a comparison of the key physical specifications:
FE 16-35mm F2.8 GM II (SEL1635GM2):
Dimensions (Diameter x Length): 87.8 x 111.5 mm
Weight: 547 g
Filter Size: 82 mm
Focus Hold Buttons: 2
Aperture Ring: Yes
Iris Lock Switch: Yes
Aperture De-Click Switch: Yes
FE 16-35mm F2.8 GM (SEL1635GM):
Dimensions (Diameter x Length): 88.5 x 121.6 mm
Weight: 680 g
Filter Size: 82 mm
Focus Hold Buttons: 1
Aperture Ring: No
Iris Lock Switch: No
Aperture De-Click Switch: No
Impact on Portability and Balance
This reduction in size and weight directly translates into practical benefits for photographers. The GM II is easier to pack for travel and less tiring to carry and use during long shooting sessions. Its lighter weight improves the overall balance, especially when mounted on Sony’s increasingly compact Alpha camera bodies. Furthermore, while both lenses physically extend when zoomed towards the wider end (the GM II extends by approximately 9mm towards 16mm, being shortest at 35mm), the GM II is designed to maintain a more consistent centre of gravity throughout the zoom range. This enhanced stability is a significant advantage for videographers using gimbals or other stabilising equipment, minimising the need for rebalancing after changing focal length. The original GM I also extends during zooming, potentially leading to more noticeable balance shifts.
Enhanced On-Barrel Controls
The GM II incorporates several handling upgrades that align it with Sony’s latest lens design philosophy, offering more direct, tactile control:
Aperture Ring: A key addition is the physical aperture ring, allowing direct manual control of the aperture in 1/3-stop increments. This feature, absent on the GM I, is now standard across the GM II trinity. For videographers, a crucial inclusion is the de-click switch, enabling smooth and silent aperture adjustments during recording. The ring also features an ‘A’ (Automatic) position, allowing aperture control to revert to the camera body if preferred.
Iris Lock: Complementing the aperture ring is an Iris Lock switch. This practical feature prevents the aperture ring from being accidentally moved out of the ‘A’ position or away from a manually selected aperture, addressing a common handling concern with aperture rings, especially during lens changes or in fast-paced shooting situations.
Focus Hold Buttons: The GM II features two customisable focus hold buttons, typically assigned to AF-lock but configurable via the camera menu. One is placed conventionally on the side, while the second is located on the top of the barrel, providing easier access when shooting in vertical (portrait) orientation. This is an upgrade from the single focus hold button found on the GM I.
Zoom Smoothness Switch: Some specifications also mention a zoom smoothness switch, allowing adjustment of the zoom ring’s torque, although this feature receives less attention in reviews.
The convergence of these handling features across the GM II lens series (16-35mm, 24-70mm, 70-200mm) creates a significant ergonomic advantage. For professionals who frequently switch between these focal lengths, the consistent placement and functionality of controls like the aperture ring and focus hold buttons allow for a more intuitive and efficient workflow, relying on muscle memory rather than adapting to different layouts. This operational parity makes the GM II wide-angle feel like a natural extension of the updated system, a tangible benefit over mixing first and second-generation lenses.
Build Quality and Weather Sealing
As expected from a G Master lens, the GM II maintains a high standard of construction. It utilises a hybrid construction incorporating both metal and plastic components to achieve a balance between durability and the targeted low weight. Comprehensive dust and moisture resistance is implemented through seals and gaskets at seams and around the lens mount, providing confidence for use in challenging weather conditions. It is important to note, however, that Sony does not guarantee 100% protection. The front element features a fluorine coating, which helps repel water, oil, and fingerprints, making the lens easier to keep clean. Additionally, the included petal-shaped lens hood has been redesigned to be smaller and sleeker, complementing the lens’s reduced dimensions.
- Optical Performance: Sharper, Closer, Clearer?
While physical refinements enhance usability, the core value of a G Master lens lies in its optical capabilities. The FE 16-35mm F2.8 GM II employs a revised optical design intended to surpass the already high standards set by its predecessor.
Optical Design Overview
The GM II features a slightly less complex optical formula than the GM I, comprising 15 elements arranged in 12 groups, compared to the GM I’s 16 elements in 13 groups. Despite fewer elements, the GM II incorporates a sophisticated array of specialised glass, including three XA (extreme aspherical) elements, one standard aspherical element, one Super ED (Extra-low Dispersion) element, two ED elements, and one ED glass aspherical element. The original GM I utilised two XA elements, three standard aspherical elements, and two ED elements. Sony explicitly states that the GM II is designed to rival the performance of prime lenses, indicating ambitious optical goals.
Here’s a comparison of the key optical performance metrics:
FE 16-35mm F2.8 GM II (SEL1635GM2):
Optical Formula: 15 Elements / 12 Groups
XA Elements: 3
ED / Super ED Elements: 1 Super ED, 2 ED, 1 ED Aspherical
Aspherical Elements: 1 (plus XA and ED Aspherical)
Minimum Focus Distance: 0.22 m (8.7″)
Maximum Magnification: 0.32x
Aperture Blades: 11, Rounded
Coating Type: Nano AR Coating II
FE 16-35mm F2.8 GM (SEL1635GM):
Optical Formula: 16 Elements / 13 Groups
XA Elements: 2
ED / Super ED Elements: 2 ED
Aspherical Elements: 3 (plus XA)
Minimum Focus Distance: 0.28 m (11.0″)
Maximum Magnification: 0.19x
Aperture Blades: 11, Rounded
Coating Type: Nano AR Coating
Sharpness Analysis
Professional reviews and lab tests generally indicate that the GM II delivers exceptional sharpness across the frame, often exceeding the performance of the GM I, particularly wide open at F2.8 and towards the corners. Centre sharpness is frequently described as outstanding even at the maximum aperture. Some analyses suggest the improvement is most noticeable at the 35mm end of the zoom range compared to the original. The GM I, however, was already considered a very sharp lens, especially when stopped down slightly, setting a high benchmark for its successor.
However, a degree of caution is warranted. While controlled tests paint a picture of clear superiority for the GM II, real-world user reports present a more mixed view. Some users, particularly on forums like Fred Miranda, have reported experiencing disappointing corner sharpness with their retail copies of the GM II, sometimes finding their previous GM I performed better in this regard. Concerns about decentring or sample variation, issues occasionally associated with Sony lenses even at the G Master level, have been raised. This discrepancy between lab results and some user experiences suggests that while the GM II’s optical design is likely superior, achieving that potential consistently across all manufactured units might be challenging, possibly due to the tighter tolerances required by the more compact design. This implies that the sharpness advantage over a known, well-performing GM I copy may not be guaranteed for every GM II unit purchased.
Bokeh Quality
Both the GM I and GM II feature an 11-bladed circular aperture designed to produce smooth, aesthetically pleasing bokeh (the quality of out-of-focus areas). Sony claims improved bokeh for the GM II, and its optical design specifically targets the reduction of ‘onion ring’ patterns within bokeh highlights. While wide-angle lenses inherently produce less background separation than longer focal lengths, reviews suggest the GM II renders out-of-focus areas smoothly and attractively, perhaps offering a marginal improvement over the GM I. However, some direct comparisons found the practical difference in bokeh quality to be minimal.
Aberration, Distortion, and Flare Control
Chromatic Aberration: Thanks to the inclusion of ED and Super ED glass elements, the GM II demonstrates excellent control over both longitudinal (LoCA) and lateral (LaCA) chromatic aberrations, resulting in minimal colour fringing even in high-contrast areas. The GM I also employed ED elements effectively for CA suppression.
Distortion: Like most wide-angle zooms, the GM II exhibits noticeable barrel distortion at its widest 16mm setting. Some reviews describe it as complex distortion that benefits significantly from lens correction profiles applied in-camera or in post-processing. Distortion becomes fairly neutral around 24mm and transitions to minor, easily correctable pincushion distortion at 35mm. While the GM I also had wide-angle distortion, some comparisons suggest the GM II shows an improvement, particularly at 16mm.
Vignetting: Significant light fall-off towards the corners (vignetting) is present when shooting wide open at F2.8, especially at 16mm (measured at over one stop in some tests). This is typical for fast wide-angle zooms and is effectively handled by correction profiles. The GM I also exhibited vignetting. Interestingly, one direct comparison found the GM II actually showed less vignetting than the GM I at 16mm F2.8 under identical conditions.
Flare Resistance: The GM II utilises Sony’s more advanced Nano AR Coating II, designed to provide superior suppression of internal reflections, ghosting, and flare compared to the original Nano AR Coating found on the GM I. Reviews generally praise the GM II’s excellent performance in challenging backlit situations, maintaining high contrast and clarity. However, at least one direct comparison reported finding little practical difference in flare handling between the two generations in their specific tests.
Major Upgrade: Close-Focus Performance
Perhaps the most significant and universally praised optical improvement in the GM II is its dramatically enhanced close-focusing capability. The Minimum Focus Distance (MFD) has been reduced from 0.28 m (11.0 inches) on the GM I to just 0.22 m (8.7 inches) on the GM II, consistent across the entire zoom range. This closer focus ability translates into a much higher maximum magnification ratio: 0.32x for the GM II compared to only 0.19x for the GM I.
This substantial increase in magnification (approaching the 1:3 reproduction ratio) significantly expands the lens’s versatility. It allows photographers to get much closer to their subjects, capturing intricate details and creating dynamic, exaggerated perspectives characteristic of wide-angle close-ups. This capability was not a particular strength of the original GM I. The 0.32x magnification brings the GM II’s close-up performance in line with other modern zooms like the FE 24-70mm F2.8 GM II, enabling greater subject isolation against blurred backgrounds even at wide focal lengths. For photographers interested in environmental portraits, product details, food photography, or simply adding more compositional flexibility to their wide-angle work, this improved close-focus performance represents a tangible creative advantage and a compelling reason to consider the upgrade beyond incremental sharpness gains.
- Autofocus Leaps Forward: Speed, Precision, and Video Focus
The autofocus system represents another area of substantial advancement in the FE 16-35mm F2.8 GM II, leveraging Sony’s latest motor technology for marked improvements in speed, accuracy, and suitability for video applications.
Motor Technology Upgrade
The GM II replaces the original’s capable but older dual Direct Drive SSM (DDSSM) autofocus system with a significantly more advanced setup. It employs four of Sony’s high-thrust XD (Extreme Dynamic) Linear Motors. These motors drive a floating focus mechanism, where internal lens groups move independently to maintain optimal image quality across all focus distances and focal lengths. While the GM I also featured a floating focus design, the combination with the quad XD Linear Motors in the GM II yields superior performance.
Performance Gains
The implementation of XD Linear Motors brings several key autofocus benefits:
Speed: Sony claims the GM II’s AF can be up to twice as fast as its predecessor. Independent reviews corroborate this, describing the autofocus as “lightning fast” and “near instant,” enabling rapid focus acquisition and transitions between near and far subjects with minimal delay.
Precision and Tracking: The XD motors offer enhanced precision and responsiveness. This translates to improved subject tracking performance, reliably maintaining focus on moving subjects even while zooming. The system is capable of supporting the high continuous shooting rates (up to 30 fps) of advanced Sony bodies like the Alpha 1. Excellent eye-tracking performance has also been noted.
Low Light: While the GM I’s AF was competent, some comparisons suggest the XD motors in the GM II provide slightly better autofocus reliability in challenging low-light conditions.
Video-Centric AF Improvements
The autofocus enhancements in the GM II extend significantly to video performance, addressing key requirements for modern videography:
Focus Breathing: Focus breathing (the slight change in focal length that can occur when shifting focus) is significantly suppressed optically in the GM II compared to the GM I. Furthermore, the lens supports the in-camera Breathing Compensation feature available on newer Sony Alpha and Cinema Line cameras, allowing for near-elimination of this distracting effect.
Quiet Operation: The XD Linear Motors operate virtually silently, ensuring that autofocus adjustments are not picked up by microphones during video recording.
Smoothness: Focus transitions are smooth and confident, without noticeable stepping, hunting, or pulsing, resulting in professional-looking focus pulls.
Parfocal-like Behaviour: Some reviewers have observed that the lens behaves in a parfocal-like manner, meaning focus is largely maintained even when the focal length is changed during a shot. While not strictly parfocal, this behaviour is a significant benefit for videographers who often zoom during recording.
The comprehensive overhaul of the autofocus system stands as one of the most compelling technical arguments for upgrading from the GM I to the GM II. The older DDSSM system was effective for its time, but the quad XD Linear Motors represent Sony’s current pinnacle of AF technology, offering demonstrable advantages in speed, tracking, and quietness. These improvements are particularly relevant for photographers capturing fast action, events, or wildlife, where the lens’s wide perspective might be employed. Crucially, the enhancements tailored for video โ especially the minimised focus breathing and silent operation โ directly cater to the needs of hybrid shooters and dedicated videographers, a user base whose requirements have become increasingly central to lens design. The GM II’s AF performance is better matched to the capabilities of Sony’s latest high-speed camera bodies, promising a higher keeper rate and smoother, more professional footage.
However, it is worth noting the perspective of diminishing returns. While objectively superior, the practical value of the GM II’s enhanced AF depends on the user’s specific needs. Some photographers, particularly those primarily shooting static subjects like landscapes or architecture, may find the autofocus performance of the original GM I entirely sufficient. For these users, the faster motors of the GM II might represent less of a critical upgrade compared to those shooting dynamic scenes or demanding video sequences.
- Perspectives from Professionals and Peers: Reviews and Forum Insights
Evaluating the real-world value of the FE 16-35mm F2.8 GM II necessitates considering both formal technical reviews and the experiences shared by photographers using the lens in practice.
Synthesis of Professional Reviews
Across major photography publications and testing sites, the FE 16-35mm F2.8 GM II has received overwhelmingly positive assessments. Reviewers consistently praise the significant reduction in size and weight, making the lens more manageable and portable. The enhanced handling, particularly the addition of the aperture ring with its de-click option and lock, is frequently highlighted as a major improvement. The dramatically improved close-focus capability (0.32x magnification) is lauded for its added versatility. Autofocus performance is consistently described as exceptionally fast, quiet, and accurate, with particular commendation for its suitability for video due to minimal focus breathing and smooth operation. Optically, the lens is generally rated as excellent, delivering high levels of sharpness across the frame, well-controlled chromatic aberration, and impressive flare resistance. Minor criticisms typically revolve around the noticeable barrel distortion at 16mm (though correctable) and the premium price point, which places it firmly in the professional market segment.
User Forum Sentiment (Reddit, Fred Miranda)
Discussions among photographers on platforms like Reddit and Fred Miranda provide valuable real-world context and reveal nuances often missed in formal reviews.
Agreement on Positives: Users generally concur with reviewers regarding the benefits of the GM II’s lighter weight, the utility of the aperture ring, and the significantly improved close-focusing distance. The faster autofocus is also acknowledged as an improvement.
The Value Debate: A dominant theme in user discussions is the cost-benefit analysis of upgrading. The substantial price difference between a new GM II (around $2,300 USD) and the readily available used market for the GM I (often found between $1,000-$1,300 USD) is a major consideration.
Many users argue that the original GM I offers superior value for money, especially if its performance is deemed sufficient for their needs and the handling/weight advantages of the GM II are not critical priorities. The sentiment often expressed is that the GM II offers primarily “quality of life” improvements rather than a revolutionary leap in core functionality for many users.
Image Quality Debate and Copy Variation: This area reveals the most significant divergence between professional reviews and user experiences. While some users report excellent image quality from their GM II copies, matching or exceeding expectations, a notable number have expressed disappointment. Specific concerns frequently mentioned include subpar corner sharpness, particularly at wider apertures or when stopped down for landscape foregrounds, sometimes perceived as worse than their previous GM I copy. Issues with decentring (where one side or corner of the frame is softer than others) have also been reported. This raises concerns about manufacturing consistency, particularly in early production runs, suggesting that the theoretical optical superiority of the GM II might not be realised in every unit. This potential inconsistency makes the upgrade feel riskier for those with a known, high-performing GM I.
Alternative Considerations: Users often weigh the 16-35mm GM II against other options. The Sony FE PZ 16-35mm F4 G is mentioned as a lighter, cheaper alternative with a power zoom feature, albeit with a slower F4 aperture. Third-party lenses like the Sigma 14-24mm F2.8 DG DN Art are considered for their wider perspective and excellent optics, though they are heavier and lack front filter threads. Some users also contemplate replacing the zoom with high-quality wide-angle primes like the Sony FE 20mm F1.8 G or FE 35mm F1.4 GM, which offer wider apertures for better low-light performance and shallower depth of field, albeit sacrificing zoom flexibility.
The high regard in which the original FE 16-35mm F2.8 GM is held creates a significant challenge for the GM II’s upgrade proposition. Many photographers find the performance of the GM I to be not just adequate, but excellent for their requirements. While the GM II offers improvements across multiple parameters, these are often perceived as incremental rather than transformative, especially concerning core image quality for typical applications. Consequently, the decision shifts from simply asking if the GM II is better (which, technically, it largely is) to whether it is sufficiently better to warrant the substantial cost over a lens already considered “good enough” or even “great” by its owner.
Furthermore, the discrepancy between the consistently glowing reports on sharpness in professional reviews and the user forum discussions highlighting copy variation and corner sharpness issues is noteworthy. This suggests a potential gap between the performance achievable under controlled testing conditions (often with carefully selected samples) and the experience of purchasing and using a retail unit. Factors like the GM II’s complex optics packed into a smaller, lighter body could potentially increase sensitivity to manufacturing tolerances. This highlights the value of user forums as a counterpoint to formal reviews and underscores the importance for potential buyers, particularly those upgrading, to be aware of this potential variability and ideally test specific copies or purchase from retailers with reliable return policies. Relying solely on published MTF charts or review conclusions might not fully capture the potential range of real-world performance.
- The Verdict: Justifying the Upgrade from GM I to GM II
The Sony FE 16-35mm F2.8 GM II undoubtedly represents a technically superior lens compared to its predecessor, embodying Sony’s latest advancements in optical design, autofocus technology, and handling ergonomics. It successfully delivers on the G Master II philosophy of creating lighter, smaller, yet higher-performing professional tools.
GM II Advantages Summarised:
The key strengths favouring the GM II are clear:
Physical: Significantly lighter (by 133g) and more compact (10mm shorter), improving portability and balance.
Handling: Superior ergonomics with the addition of a de-clickable aperture ring, iris lock, and a second customisable focus hold button.
Autofocus: Markedly faster, quieter, and more precise AF performance powered by four XD Linear Motors, offering better tracking and significantly reduced focus breathing for video.
Close Focus: Dramatically improved close-up capability with a 0.22m MFD and 0.32x maximum magnification, unlocking new creative possibilities.
Optics: Refined optical formula potentially offering improved corner-to-corner sharpness (copy variation notwithstanding), better flare control via Nano AR II coating, and excellent chromatic aberration suppression.
GM I Strengths and Cost Factor Acknowledged:
Despite the GM II’s advancements, the original FE 16-35mm F2.8 GM should not be dismissed. It remains a highly capable lens delivering excellent image quality that satisfies many professionals and enthusiasts. Its primary advantage now lies in its significantly lower cost, particularly on the used market where it can often be acquired for less than half the price of a new GM II.
Nuanced Recommendations – Who Should Upgrade?
The decision to upgrade is highly dependent on individual needs, shooting style, and budget.
A Compelling Case for Upgrading Exists For:
Hybrid Shooters and Videographers: This group stands to gain the most. The vastly improved autofocus (speed, silence, tracking, minimal breathing), the de-clickable aperture ring for smooth iris pulls, and the improved balance for gimbal work collectively offer substantial operational benefits for video production.
Action, Event, and Sports Photographers: Users needing the utmost autofocus speed and tracking reliability to capture fast-moving subjects, even with a wide-angle perspective, will appreciate the responsiveness of the XD Linear Motors.
Photographers Prioritising Portability and Handling: Those who found the original GM I heavy or cumbersome, or who value the enhanced tactile controls (aperture ring, extra button) for a more efficient workflow, will find the GM II a significant ergonomic improvement.
Users Requiring Close-Focus Versatility: Photographers frequently shooting close-up wide-angle perspectives (e.g., environmental portraits with foreground interest, product details, food) will find the 0.32x magnification a distinct and valuable creative advantage over the GM I.
A Less Compelling Case for Upgrading Exists For:
Primarily Landscape and Architecture Photographers: If shooting predominantly stopped-down on a tripod, the AF speed advantage is less critical. If an existing GM I copy delivers excellent corner sharpness when stopped down, the potential (and reportedly variable) sharpness gains of the GM II might be marginal relative to the cost.
Budget-Conscious Photographers: If the original GM I already meets performance requirements, the considerable cost of the GM II makes it a luxury upgrade. Investing the difference in other equipment or travel might yield greater photographic returns.
Owners Satisfied with Excellent GM I Copies: Photographers who possess a well-performing copy of the original GM I and are content with its handling and autofocus may find the benefits of the GM II insufficient to justify the expense and the potential risk (highlighted in user forums) of encountering a less-than-perfect GM II copy.
Final Thoughts
The Sony FE 16-35mm F2.8 GM II is, by objective measures, a more advanced and refined lens than its predecessor. It successfully integrates Sony’s latest technologies into a smaller, lighter package with significantly enhanced autofocus and close-focusing capabilities. However, the excellence of the original GM I, combined with the substantial cost of the upgrade and user reports of sample variation, means the decision is not automatic.
The upgrade is most justifiable for those whose work directly benefits from the specific improvements offered: videographers needing better AF and handling, action shooters requiring maximum speed, photographers demanding greater close-focus versatility, or those simply placing a high premium on reduced weight and improved ergonomics. For others, particularly those satisfied with the optical quality and AF of their current GM I for less demanding applications, the original lens remains a formidable and far more economical choice. Given the discussions around sample variation, prospective buyers are advised to purchase from reputable dealers with robust return policies and, if possible, test the specific lens copy before finalising their decision.