I had to register on the forum to reply and thank for the thread. So much good info and food for thought.
Also, a basic report on some lenses that I've experimented with on my 100s II.
MF Lenses Pentax 645 "A" 35/3.5 - Very good, outstanding lens. Great resolution and contrast already wide open even if corners improve stopped down, suprisingly decent against the light. Obviously no vignetting. Can be shifted some, 5-9mm, without major corner issues. This is a special lens.
Mamiya 645 "C" 45/2.8 - Poor corners, no vignetting to speak of but smeary. Stopping down does not help much. Avoid.
Mamiya 645 "C" 80/1.9 - Slightly soft and glowy/dreamy wide open with funky OOF areas. Very sharp, flat-field and even looking stopped down. Can be shifted considerably (10-15mm) with neglible corner issues. Not bad at all for landscape purposes.
Mamiya "N" 150/3.5 - Slightly soft wide open, gets to an acceptable level stopped down. Lightweight and handy for landscape work. Can be shifted moderately (10ish mm) with neglible corner issues.
Mamiya 105-210/4.5 ULD - Soft and glowy wide open, unusable at longer distances at F/4.5, but can be acceptable if that is the look one want at closer distances. Stopped down to F8 it sharpens up imensely and contrast gets to a more usable level. More or less the same story throughout the focal range. Can be shifted a little, 4-6mm, with acceptable results. This lens can be had very cheaply, under 100$, and if one considers it an "F/8 and be there" type lens it offers a lot of IQ for the buck.
35mm Lenses Nikon 50/1.4 Ais (F-mount) - Hard mechanical vignetting that never really clears, near or far, stopped down or not.
Petri 55/1.8 (M42) - Soft gradual vignetting and low resolution in the corners wide open, especially at closer distances. Center is acceptable even wide open. Vignetting easilly correctable. Fairly good resolution and contrast stopped down accross the frame. More of a character lens, but acrtually fun to use and images look lovely.
Tamron 90/2.8 (F-mount) - Hard mechanical vignetting at closer distances, the centre however, remains very good.
Carenar 135/2.8 (M42 "made in japan") - Very modest and gradual vignetting, absolutely no problem to correct if so desired. Soft and a bit glowy wide open, improves drastically stopped down. Somewhat muted color and contrast, I guess it could be called bland. Long minimum focus distance (about 2.2 - 2.5m) makes it less practical too.
Oct 13, 2025 at 04:54 AM
Previous versions of stumblingfalk's message #16907500 « Adapting Lenses to the Fuji GFX »
