Ok....bare with me on this! I have an Cosina 55 1,2 wich i have used and been happy with! Just recenty i got myself an Pentax A-50 1,2.
Curious as i am i wanted to check out the differences in sharpnes, bokeh, rendition etc etc, between the two of them. So i did something i never do with manual lenses. I hooked the camera to an tripod, used various items such as flowers, keys and also an focus test chart.
Sidenote: I'd never thought about doing this before, because i trusted manual lenses to focus correctly. And to be honest....is hard to nail focus handheld @ f1,2
But now i did test it, and to my surprise i had front focus with both Pentax A-50 and Cosina 55. I could'nt believe it. I have perfect eyesight. I can clearly se how i get focus in the VF, on the "focus" line on the chart, and the camera approves with the hex.symbol.
Yes. i've done everything by the book with the tripod and camera.
Strange thing 1: If i switch over to LV, no problem!
Strange thing 2: I have no problems with my other lenses, 16-45, 55-300, D-FA 100 macro. If i manually focus them, i get the focus where i see it in the VF.
So....whats going on? Has my camera a front focus issue with manual lenses only? I just cant see what could cause this. Why front focus with manual lenses, and not with the others?