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Sadly it seems a lot of Nikon lenses were not designed with reducing focus shift as a priority. That completely wrecks them near their minimum focus distance on
by enthdegree 1mo ago
Sadly it seems a lot of Nikon lenses were not designed with reducing focus shift as a priority. That completely wrecks them near their minimum focus distance on film bodies. Phase-detect AF only sees light coming from the f/5.6 direction so AF will systematically miss its target at any aperture with a different focal plane. There is no live view on film, obviously, so no on-instrument way to correct it.
I am going through this right now... I really wanted an 85mm 1.4G but according to reviews it will put focus completely behind the subject from f/1.8-f/5.6 when closer than head+torso distance. In headshots if you target the eyes it will focus somewhere on the temples. I have no idea if it really matters in real life. So I am stuck with the 1.8 G.
Edit: A focus screen with some kind of prism mechanism would let you manually focus, at least, by holding down DOF preview. Richard Haw describes cutting down and shimming off-body focus screens so it's possible. Actually now that I look it up, whoa, an off-the-shelf one exists on aliexpress ("Dual 45 degree Split Image Focus Focusing Screen for Nikon D1 D1H D1X F100 PR129")
- cryo32 1mo agoYeah that's exactly what happens. The 85mm 1.8G is really good enough though! I wouldn't want to fudge with focus screens - I managed to cock up a D750 doing that once. Took ages to get it right after. Really I stopped shooting film in 2022 because of the arrival of CT scanners at airports. Fed up of arguing with people as I do most of my photography out of my home country. And it's expensive. Sold it all, bought a Nikon Z50ii basic kit in 2024 and that was so good and tiny that I sold my D850 and the rest of the F mount lenses. AF on the newer Z cameras is something special, even on the crap bodies. Haven't felt the need to buy an FX Z yet as the DX ones are so good.