Why This Macro Lens Actually Moves the Needle

After more than a decade, Sony finally replaced one of its most trusted macro lenses. The wait raises a simple question: what makes this one different enough to matter?

Coming to you from ZY Cheng, this detailed video explores the Sony FE 100mm f/2.8 Macro GM lens and explains how it pushes beyond the limits of the previous full frame macro option from Sony. You’ll see that it dramatically improves corner-to-corner sharpness at 1:1 magnification. You’ll also learn how the lens handles autofocus and manual focus differently than the older model. The video makes it clear that even using this lens for non-macro work (for example on a 61 MP body), it delivers “seemingly endless resolution.” That kind of performance matters when you’re serious about image quality. The segment on how the manual focus clutch mechanism has been reworked is especially useful if you’re already familiar with the older macro lens and are looking for improved usability.

In the next part of the video, Cheng shows the new lens’ support for full-time direct manual focus (DMF), even when autofocus is active. You’ll find out how that solves a major annoyance macro shooters have faced: switching from autofocus to manual focus without losing the reference position. There’s also a comparison with the older 90mm macro lens (which held the job for over a decade) and an explanation of why Sony waited so long to release a macro G Master-branded lens. That discussion gives insight into how the company defines “enough of an improvement” to justify a new generation. If you’ve been working for a while with the old macro lens, this video gives a good measure of whether the upgrade is worth your time.

Key Specs

• Focal Length: 100mm

• Aperture: Maximum f/2.8, Minimum f/22

• Lens Mount: Sony E

• Lens Format Coverage: Full-frame

• Minimum Focus Distance (from camera sensor): 10.2 in / 26 cm

• Magnification: 1.4:1 (1.4x) Macro Reproduction Ratio

• Optical Design: 17 elements in 13 groups

• Aperture/Iris Blades: 11, Rounded

• Focus Type: Autofocus

• Image Stabilization: Yes

• Filter Size: 67 mm (front)

• Dimensions: diameter ø 3.2 in x length 5.8 in / ø 81.4 mm x L 147.9 mm

• Weight: 1.4 lb / 646 g

When you watch the video, you’ll notice Chang emphasizes how Sony resolved a key limitation of the older macro lens: the inability to fine-tune manual focus once autofocus had locked. That meant you often had to switch lenses or re-focus entirely when doing macro. With this new lens you can use direct manual focus while autofocus remains active, which speeds your workflow when you’re working close up. He also points out that the older lens had served well, but that a newer “G Master” version had to represent a clear leap in performance to make sense. Looking at the sample images at 1:1 magnification shows how aberrations are very well controlled, even into the corners.

Cheng mentions that with a 2x teleconverter attached, the lens can reach 2.8x life size. He walks through a real-world test: capturing a moving subject overhead (a plane) and still resolving details wide open at f/5.6 (when using the teleconverter). That example highlights how this lens can perform in unexpected situations beyond static macro setups. Check out the video above for the full rundown from Cheng.