Sony FE 100mm F2.8 STF GM Lens Review

Sony FE 100mm f/2.8 STF GM OSS Lens Review

NEW Sony FE 100mm f/2.8 G Master Lens Review

Sony has announced an incredible new member to the G Master lens family. In this Sony FE 100mm f/2.8 STF GM OSS Review you will learn how this lens produces the most beautiful Bokeh ever. Let's jump into the Sony FE 100mm F2.8 STF GM Lens Review.

Most reviewers who have had a chance to compare this Sony FE 100mm f/2.8 STF GM OSS lens with other models have produced photos with better-feathered edges and the aforementioned brilliant bokeh effect.​ Let's take a look at this bokeh monster.

Sony SEL100F28GM

Innovative Design Features

This Sony G Master family is a revolution in technology that is making digital single-lens reflex (DSLR) cameras legacy with the future being mirrorless cameras. The Sony FE 100mm f/2.8 STF GM OSS Lens is one of the latest in the family Sony mirrorless shooters have a lot to get excited about.

These newest Sony cameras on the market have image sensors that produce mind-blowing quality, that most of us couldn't image just a few years ago. That is where Sony has stepped up the game creating a line of lenses (G-master) that could match the incredible sensors in today's cameras.

Sony FE 100mm STF GM Construction

If you are looking for incredible bokeh, STF is where it's at. The STF is abbreviation stands for smooth trans focus. STF which will ease the plane of in-focus and out-of-focus areas in an image due to the unique optical system. In this latest model, Sony accomplishes this by a clever inclusion of an integral anodization element which limits the incoming light and giving a more reasonable background through its ability to smooth out-of-focus areas in the background.

In this Sony FE 100mm f/2.8 STF GM OSS lens review we looked at the excellent bokeh qualities.

The Sony FE 100mm f/2.8 STF GM OSS lens has an integral 11-blade circular aperture which is a large part of the reason for such excellent bokeh and exceptional sharpness in the Sony FE 100mm f/2.8 STF GM OSS Lens.

The background does not become a distraction, but rather becomes something that is pleasing to the eye and inherently brings out the best in the subject. Sony claims that it is the 'most beautiful bokeh that you've ever seen.

NEW SONY 100mm F/2.8GM STF OSS G Master Lens Video

Power Is In The Details

G Master Series lenses have a plethora of integrated technology to bring the most out of the product. One of these is the Direct Drive SSM (DDSSM) which is, in effect, a supersonic motor created with the most precision on the market today. 

The precision in the focusing stop positions is near perfect so that the total focusing time is significantly reduced resulting in some of the fastest and precise focusing to be found anywhere in today's mirrorless cameras. The DDSSM even does this all the while being incredibly quiet when compared to other lenses.

The design for the Sony FE 100mm f/2.8 STF GM OSS Lens is that of an aspherical lens so that the surface profile is not the older sphere or lens variety. The machines and workers in the Sony factory work overtime to produce a quantity of these lenses through grinding and polishing until the profile is so clean and true to form.

Sony FE 100mm GM Functions

The FE 100mm f/2.8 STF GM OSS lens is precise in the focusing stop positions and is near perfect. The total focusing time is significantly reduced resulting in some of the fastest and accurate focusing compared to other mirrorless cameras. The DDSSM even does this all the while being incredibly quiet when compared to other lenses.

These lenses are so excellent that they might be used in high-end telescopes or missile guidance systems if it was not for Sony's love for photographers and the desire to put a product in their hands that only a company of its caliber could deliver.

Keeping It Steady

The OSS in the name indicates that this Sony lens uses a technique called optical image stabilization which is Sony's trademarked Optical SteadyShot solution. Motion sensors within the camera work to neutralize any inherent shakiness in the operator's hands by moving the optics and image sensor in the opposite direction of the implied movement.

The f-stop on this lens is 2.8 which is a reasonable combination creating the image sharpness which Sony is so adamantly pushing for with their deliverance of high-quality bokeh. It means that the entrance pupil diameter is 35.7mm which will help to keep the focus exclusively on the subject for high-quality shots that impress the audience that receives them.

A Few Small Negatives

A couple of the primary drawbacks of this latest Sony lens is going to be that it is quite expensive for a prime lens. It is also larger than most would like for a lens with this focal length. However, if the Sony FE 100mm f/2.8 STF GM OSS Lens is within the budget, then this is certainly one of the models to be considered.

Despite its size difference, it is a good fit and balance for Sony full frame mirrorless bodies The lens barrel is made out of a rigid polycarbonate meaning that it is going to be able to handle the bump and grind of daily use without suffering damage which could hurt the pocketbook of any purchaser.

The design also incorporates high sophisticated actuators to refine focus for more precise focusing whether using the product in manual or automatic mode. It is through this sophistication that lens can deliver stunning quality and harness a potential that has it getting a top notch score.

Proprietary technology, combined with design excellence is many ways. For example, the weight of a G Master's focus lens is two separate groups for an even weight distribution which deals with the common problem of aberrations at the different subject distances. The floating design allows for independent control of each lens element for the precision that is simply not available with most manufacturers' models.

Designed For Utility

A manual focus adjustment control ring sits right behind the front element, and then there is an aperture and STF (smooth trans focus) control ring in the middle. Complemented by a third ring near the base which is used to alternate between standard and close focus ranges.

The autofocus system can be locked into place through the depression of the 'hold focus' button, along with two toggle switches one of which alternates between autofocus and manual focus and the other toggle turns on and off the embedded optical stabilization system.


​A Sony engineer stated that Sony G-Master series was designed to build lenses that will remain relevant in the future so that no one feels slighted by their purchase and can continue to take the stunning photographs that have come to expect from the industry giant's products.

Overall, Sony is and will continue to be a leader in the development of lenses. With Sony being the number one image sensor manufacture, they have built the G-Master series lenses for photographers ROI in mind. The Sony FE 100mm f/2.8 STF GM OSS lens is a stunning piece of future proofed gear that you can grow into rather than out of.

A Conclusion Of Excellence​

One of the biggest concerns might be for photographers who need a fast lens for low light situations. Since the Sony FE 100mm f/2.8 STF GM OSS lens uses Smooth Trans Focus it is closer to T 5.6 requiring more light on the subject compared to a standard f/2.8 prime lens. However, with newer Sony cameras having high ISO low noise image sensors, I have not experienced any issues.

If you are a Sony shooter and want stunning photographs, then buying the Sony FE 100mm f/2.8 STF GM OSS lens is a must. There might not be a better lens for portraits and stunning bokeh images.

About the Author Fred Meek

Fred Meek is Security Consulting Engineer for a Cyber Security Company. Fred holds several industry certifications including Cisco CCNP, Palo Alto Networks PCNSE, EC-Council Certified Ethical Hacker and has over 20 years in the high-tech industry

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