Two Sharp APS-C f/1.2 Prime Lenses Tested

Two bright APS-C primes with a reputation for bold styling and fast glass get a workout in the real world in this helpful video review. The focus is practical: how f/1.2 affects autofocus, handling, and day-to-day shooting .

Coming to you from Mark Duffy, this candid video looks at the Sirui Sniper 16mm f/1.2 and Sirui Sniper 75mm f/1.2 on a Sony a7 IV in APS-C mode. Duffy highlights the appeal of f/1.2 on smaller sensors for events and low light, calling out the light intake and shallow depth of field you can still get. He compares the three finishes and points out that the white version feels more premium, while the darker finish blends in better if you want to stay unnoticed. The design is intentionally minimal, which means no autofocus or manual focus switch on the barrel, pushing you to map a custom button on the camera.

The 16mm is tiny, with a 58mm filter thread that may force an adapter. The 75mm uses a 67mm thread and presents as a more conventional portrait tool. Both lenses include a USB-C port for firmware, which matters if autofocus behavior changes with updates. Focus rings are smooth and evenly damped, and the blue accent ring gives a subtle visual cue in hand.

Autofocus is where the two diverge in his testing. The 75mm behaves cleanly on the a7 IV in crop mode, holding focus in everyday shooting and delivering predictable results. The 16mm creates headaches on a commercial job even in bright conditions, forcing a switch to manual focus when it refuses to lock despite being outside minimum focus distance. Duffy suspects the wide angle’s AF may be tuned for native APS-C bodies rather than a full frame body in APS-C mode, which is a detail worth noting if your main camera is full frame and you rely on crop mode. He still values the 16mm’s speed and compact size for travel and small interiors.

Build quality sits above what you expect at this price tier, with a clean aesthetic and solid materials. The white and silver finishes read upscale, while the darker finish is more discreet in crowds. The 16mm’s small size makes it easy to pack as your only wide angle, but the autofocus caveats argue for another option if a job cannot tolerate misses. The 75mm’s performance and rendering make it a practical portrait and detail lens with separation at f/1.2 and comfortable working distance. Both lenses share the convenience of firmware updates via the port on the mount, which future-proofs them if the maker issues AF refinements. Check out the video above for the full rundown from Duffy.