Zeiss Biogon T* ZM 1365-652-L 25mm

The Zeiss Biogon 25mm f/2.8 ZM is a compact, distortion-free wide-angle prime for Leica M-mount that delivers excellent contrast and surprisingly good bokeh. It's manual focus only and lacks modern features like weather sealing, which hurts its versatility score, but the optical performance is genuine Zeiss quality. Prices range from a reasonable $1,159 to an absurd $28,718, so shop carefully. Best for architecture, landscapes, and street photographers who value precision over convenience.

Optically, this lens does exactly what Zeiss promises. The distortion control is the headline feature here, and it's not marketing fluff. Straight lines near the edges of the frame stay straight, which is rare for a 25mm lens. Our optical score puts it right around the middle of the pack at the 51st percentile, but that number is dragged down by the lack of modern features. In terms of pure image quality, the contrast and color rendition are where this lens shines. The T* coating earns its reputation, keeping flare well-controlled even when you're shooting toward a light source, and the micro-contrast gives images a three-dimensional quality that's hard to quantify but easy to see.

Bokeh is the surprise standout here. An 89th percentile ranking for a wide-angle f/2.8 lens is no small feat. The 10-blade diaphragm helps, producing smooth out-of-focus areas that don't distract from your subject. At f/2.8, you're not getting razor-thin depth of field, but the transition from in-focus to out-of-focus is pleasing and natural. Focus shift, a common headache with rangefinder lenses, is well-controlled thanks to Zeiss's optical design. You can trust the rangefinder patch at f/2.8 and stop down without worrying that your focus point has drifted. The minimum focus distance of 0.5 meters is fine for most wide-angle work, though you won't be getting close-up detail shots with that 0.056x magnification.

The obvious comparison is with Leica's own 24mm M-mount lenses, and that's where the Biogon makes its strongest value argument. A Leica 24mm f/2.8 Elmarit-M will set you back considerably more, and while it's a fantastic lens, the Zeiss holds its own in terms of sharpness and distortion control. You're giving up a millimeter of focal length and some brand cachet, but you're keeping a lot of cash in your pocket. The Sigma Contemporary 18-50mm f/2.8 DC DN and Tamron 17-70mm f/2.8 are completely different beasts, modern autofocus zooms for mirrorless systems that offer way more versatility but none of the rangefinder shooting experience or compact prime character.

If you're cross-shopping the Nikon Z 17-28mm f/2.8 or Sony E 18-135mm, you're probably on the wrong mount entirely. Those lenses are for modern mirrorless systems with autofocus and electronic everything. The Biogon is for photographers who've already committed to the M-mount ecosystem and want a prime that delivers a specific look. The trade-off is clear: you get optical precision and a tactile shooting experience, but you give up autofocus, zoom flexibility, and weather sealing. For the right person, that's not a trade-off at all. It's the whole point.

Pricing on this lens is all over the map, and we mean that literally. Across different vendors, you'll see it listed anywhere from $1,159 to a frankly ridiculous $28,718. That spread of over $27,000 tells you one thing: shop around. The lower end of that range, around $1,100 to $1,300, is where this lens makes sense. At that price, you're getting genuine Zeiss optical quality in a compact M-mount package, and it compares favorably to Leica's own 24mm options which typically cost significantly more.

But let's be real. If you're paying anywhere near the high end of that price range, you're getting taken for a ride. This is not a $5,000 lens, let alone a $28,000 one. The sweet spot is finding a clean used copy or a reputable dealer listing it at the lower end. For the build quality and optical performance you're getting, $1,200-ish feels fair. Just don't pay a premium for the silver finish unless you really love the look.

The Zeiss Biogon T* 2.8/25 ZM is one of those lenses that reminds you why people still shoot rangefinders in 2025. It's a compact, all-metal 25mm prime built for Leica M-mount cameras, and it's designed to do one thing really well: deliver crisp, distortion-free images with that classic Zeiss pop. This isn't a do-everything zoom. It's a deliberate, manual focus wide-angle that asks you to slow down and think about your composition. And for the right photographer, that's the whole appeal.

We're looking at a lens that sits in a weird spot in our database. Its overall score lands at 52.5 out of 100, which sounds mediocre until you dig into why. The scoring system penalizes it hard for lacking autofocus, stabilization, and macro capability, things this lens was never designed to have. But when you look at the metrics that actually matter for a manual rangefinder prime, the story flips. Bokeh quality ranks in the 89th percentile, which is genuinely impressive for a wide-angle f/2.8 lens. Build quality is strong, and the aperture ring with its 10-blade diaphragm and 1/3 stop clicks feels precise and satisfying.

Who's this for? Street photographers who want a discreet, lightweight 25mm that won't draw attention. Landscape shooters who need straight lines to stay straight. Architecture enthusiasts who can't stand barrel distortion. It's not for wildlife, not for sports, and definitely not for anyone who wants the camera to do the focusing. But if you're already shooting an M-mount body and you want a wide-angle that renders with character and precision, the Biogon makes a compelling case for itself.

This lens is not for anyone who needs autofocus, period. If you're shooting fast-moving subjects, events, or anything where manual focus would slow you down, look at modern mirrorless options instead. The Sony E 18-135mm or Tamron 17-70mm f/2.8 will serve you much better, with autofocus, zoom flexibility, and stabilization that the Biogon simply doesn't offer.

Also skip this if you're a wildlife or sports photographer. Our scoring puts that use case at 35.5 out of 100 for good reason. The 25mm focal length is too wide, the manual focus is too slow, and the lack of weather sealing means you're one rain shower away from a bad day. For those genres, you want a telephoto zoom with fast autofocus and weather sealing. This lens is for deliberate, composed work, not chasing action.

If you're an M-mount shooter looking for a wide-angle that renders architecture and landscapes with zero distortion and excellent contrast, the Biogon 25mm f/2.8 is an easy recommendation at the right price. It's small enough to live on your camera, sharp enough for detailed work, and the bokeh quality is a genuine surprise for a lens in this class. Street photographers will appreciate the discreet size and the way the manual focus encourages a more deliberate approach to composition.

But if you need autofocus, weather sealing, or the ability to zoom, this lens will frustrate you. It's a specialized tool, and it doesn't pretend to be anything else. Wildlife and sports shooters should look elsewhere entirely, our scoring puts that use case at a dismal 35.5 out of 100. For everyone else, find a copy at the lower end of that wild price range, pair it with a 25/28mm viewfinder, and enjoy one of the most distortion-free wide-angle experiences you can get on an M-mount body.