SG-image AF 35mm f/2.2 Lens – Combines Pancake Design, Fast Aperture, and Autofocus

Lens News

by Omri Keren LapidotApril 1^st, 2026

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Pancake lenses were never completely mainstream, and it seems that a relatively new player, SG-image, is trying to change that. The Chinese company has launched the SG-image AF 35mm F2.2. This, in my opinion, is the manufacturer’s most interesting offer so far. The AF 35mm F2.2 offers a unique combination: Slim pancake design, autofocus, and a faster-than-usual f/2.2 aperture. It does so while maintaining a rather affordable $149 price tag. Let’s dive in.

The compact full-frame pancake category feels somewhat neglected by both major manufacturers and end users. While there are some representatives in the line, namely in the FUJIFILM X lineup and in Micro Four Thirds, these lenses have always been pushed aside for not being fast enough. Their compactness has become somewhat negligible compared to the size and weight of modern digital FF cameras, so aside from a select few, we haven’t seen many new pancake lenses around. Canon gave us the RF 28mm F2.8 STM, Nikon made the NIKKOR Z 26mm F2.8, and Sony somewhat pioneered the Full-Frame mirrorless market with the Zeiss Sonnar T* FE 35mm F2.8. Panasonic took the slow aperture issue to the extreme with the LUMIX S 26mm F8. Voigtlander’s SEPTON 40mm F2 ASPH is the only one in the bunch to break the F2.8 ceiling, and it does so beautifully — but it’s manual focus only and costs around $550. A truly compact, autofocus, full-frame 35mm lens hasn’t yet reached an aperture wider than F2.8. Until now.

The SG-image AF35 f/2.2 tech-specs

The AF 35mm F2.2 features a fairly simple 7-element, 5-group optical formula. A 9-blade aperture diaphragm should keep your circular bokeh highlights somewhat rounded in most aperture settings, and a minimum focus distance of 0.35m (1:7.7 magnification) won’t provide true macro, but can be used for close-up to a certain degree. The filter thread is 52mm, which will save you some funds on this side of the lens.

The lens features a bare-bones design with just a single broad manual focus ring for control. There’s also a USB-C port for future firmware updates. The lens measures 36mm (1.42 inches) in length, 69mm (2.72 inches) in diameter, and weighs 163g (5.75 oz). While the lens is fully metal on the outside, some initial reviews indicate less-than-optimal build quality. There’s nothing dysfunctional about it, but don’t expect SIGMA “i” series build quality for a third (or less) of the price.

Who is it for?

The AF 35mm F2.2 is an easy recommendation for tight-budgeted documentarians, street photographers, and travelers who want a full-frame prime that disappears into a bag, or makes their camera stealthier and less conspicuous. It’s also a compelling option as a lightweight location-scouting camera, mounted on cameras like the Panasonic LUMIX S9, Nikon Zf, or Sony a7c line.

Alternatives

As mentioned, the pancake segment is rather spacious, with not many direct competitors, especially not ones with a faster-than-f/2.8 aperture. However, sometimes other features are more important for our creative workflow, so here’s what generally sets the SG-image AH 35mm f/2.2 apart: The Canon RF 28mm F2.8 is shorter (24.7mm / 0.97 inches) and lighter (120g / 4.23 oz). It’s also a genuine RF lens, so expect better, more consistent autofocus for both stills and video. It is costlier at around $300, it’s 28mm rather than 35mm, and at f/2.8, it won’t provide the same depth of field, but if you already own an EOS RF camera, you’re not considering the SG-image variant anyway. The Nikon Z mount will get a new lens that may compete with the tiny NIKKOR 26mm f/2.8, clocking in at a mere 23.5mm (0.93 inches) in length and 125g (4.41 oz). However, the difference is significantly diluted when considering the camera’s size and the $499 price tag. The NIKKOR 40mm f/2 may prove to be a better match. While slightly larger (170g / 6.00 oz, 45mm / 1.77 inches long) and made of plastic, this lens houses almost a decade of NIKKOR lens-making experience.

The Panasonic LUMIX S 26mm f/8, as mentioned, is extraordinarily compact at 18.1mm (0.71 inches) and 58g (2.05 oz), a genuine marvel of miniaturization, but the fixed f/8 is one hard pill to swallow, and there’s no autofocus. The Voigtlander SEPTON 40mm f/2 is the closest rival in terms of aperture. With Voigtlander lenses, the SEPTON treats manual focus as a feature rather than a bug and offers some of the best mechanical build in the industry (165g / 5.82 oz, 30mm / 1.18 inches long, at around $550. Nikon shooters may also opt for the NIKKOR 40mm f/2. The SG-image undercuts every single one of them on price, matches or beats most on aperture, and offers a unique blend of features. But bear in mind – if it sounds too good to be true, it’s usually not true. While the new SG-image spec list checks all the right boxes, lenses are more than numbers. I hope we’ll have the chance to look deeper into this one and figure out how the numbers add up.

Price and availability

The SG-image AF 35mm F2.2 is available now directly on the SG-image website at $149 for the standard version, or $159 bundled with a square lens hood. It comes in three mount options: Sony E, Nikon Z, and L-mount.

Did you just wait for this faster-than-f/2.8 to pull the trigger on a pancake lens? Will the SG-image AF 35mm f/2.2 be your lens of choice, or will you go with the more conservative offers? Let us know in the comments.