Here's my Nikon Z fc with the new Pentax Asahi stereo adapter "attached" to the NIKKOR Z DX 16-50㎜ 𝑓/3.5-6.3 VR Silver kit lens. "Attached" is in quotes because while the adapter claims to be 49⌀, it's really more 47⌀, so I had to run a couple of layers of masking tape along the inside of the ring to make it fit the barrel of this 46⌀ lens. 35㎜ definitely appears to be the sweet spot as far as focal length, and the adapter is apparently designed for an aperture of 𝑓/5.6-𝑓/8.
#stereophotography