sebboh wrote: FlyPenFly wroteJust did some test shots with my Zeiss ZF.2 21mm.
I noticed that its true infinity focus setting with the Leitax mount to Sony is not at the stop but slightly before it. Is this in any way adjustable permanently or do I have to just keep it in mind every time I shoot?
I guess I could just use a red sharpy and mark it but not quite as convenient.is the focus stop at infinity on a nikon? it may be the lens not the leitax mount, i remember hearing that ZE lenses focus past infinity on canon cameras. either way, shimming the mount should work.
I am currently in testing real infinity which is-selon leica at least 10km- extraterrestrial would be wise. that explains the strong past infinity design of zeiss. didnt know of voigtländer zeiss to go beyond(cameraquest refuses to reply any of my mails). But i had long and deep phone-exchange with zeiss and manager confirmed this: old MFocus lenses like C/Y are built for film which is sensitive for IR.on digital infinity cannot be reached.
I compaired multiple 200mm lenses. P67 on K+F Comfort(Nikon and EOS-yes huge difference Nikon too long clearly! will no go into details here since its in discussion on pentaxforums., C/Y 200/3.5+P67-200 new on K+F comfort EOS do both get identical unsharpness at 7.8km building of over 200m high Communication-Tower ST.Chrischona Basel/Bettingen. also chapel nearby as target. since i havent yet P67-cam and only checked on EOS 60D and didnt yet make collimation(2-cam-method) i will always unsure if thats the camera-limit. only check jpegs also have raw. it was when i then tested Novoflex Noflexar 200/3.8 follow-focus(old but newest lens by them) to see its going past infinity even past these 7.8km. construction doesnt allow easy focus-fixing since turning knob will change focus. finefocussing-system on system B would be better i have it but only sharp T-Noflexar 400/5.6 available beside 600/8 head. will use that lenght also later. in the meantime i have got a P67-300 and compared both K+F comfort adapters. dont buy Nikon-version its clearly too long. can tell later by how much compared to EOS. when 200mm zeiss is collimated and 300mm tests done i can tell if eos-adapter is wrong of 200mm a bit off. on pentaxforum an expert means maybe 0.6mm.
Here on FM must be an adapter-thread where i wrongly stated K+F comfort C/Y-EOS would go beyond infinity. the same adapter used for actual tests. also haode. they differ from different thickness of blades 0.7mm K+F/ 0.44 Haode. noname Haode-look use even thinner blade(lens-locker) 0.22mm.- too thin.
constant lens-change not good. since blade get weak one must bend back. peleng8 noname broke when i had only one.
so why i wrongly stated not only K+F comfort C/Y going beyond in 2016 here in other thread but also sigma 25/1.8 aspherical highspeed wide(C/Y) only reaching 40m or nearer. in 2016 a right-eye degradation was in coming. 2017 we found out i have hole in right foramen/focussing nonpossible anymore with right eye. BE AWARE AND DONT DO EXCESSIVE SCREENLOOKING INCL. IN CAMERA. i did excessive tv-viewing over decades and photography since 50 years with 25 years interruption for pc-repair. also screen-viewing. i already started shimming the adapter-red tape used in lab. now have found better solution. pls read further down. with left eye it was clear the adapter does got past infinity seen here at start.i have many of them. and sigma 28/1.8 doesnt have focus-limit.
here i could only test 450m now 100m from window. scale also isnt much relevant and focus-shift is possible(depending lens-construction) when stopping down. always check focus stopped down.
but it was a big surprise those 7.8km not being perfectly sharp. i know from experience with film and enlarging how supersharp old zeiss are. had older 180/2.8
2.7km rochetower were not at infinity with K+F adapters maybe 3-5km can be reached.
story is too complicated since i tested a different new adapter which guided me back to the infinity-problem.
I have now the possibility with a newly created variable register adapter to simulate adapters by comparing results and measuring them. only problem. i only can use it now for P67-lenses.
Adapter thickness and mirrorclearing.
Was discussed endlessly here. i have four DSLREXchange adapters which are thicker clearing mirror on FF-eos.- i dont yet have these only APS-C. will check how far focussing is possible. could attach on noflexar to see if register difference is identical to the one in lens. aka if infinity is now nailed. easy blocking focus at stop then.
Novoflex has new P67-adapter-system going slightly beyond infinity. also all new Zeiss lenses Otus, Batis, Milvus etc. going beyong zeiss confirmed. so must be Voigtlaender Zeiss see discussion here.
Shim adding. 3M Scotch 805 F tape opaque ultrathin 0.05mm may help.
on the 21mm ZF2 i could imagine very thin/normal adapter touching mirror on FF. which adapter /camera used?
2. thought about changing brands(lens and camera). but this seems the best solution.
from what i have read leitax mount goes beyond infinity. so first step is getting c/y-EOS-mount here AEG for 200/3.5 AE. FF mirror cleared.
later i could exchange by EOS R-version.
NB; have the last C/Y-NIkon-mount by leitax. but only matching for a limited amount of MM lenses which i dont have anyway. there are chinese copies.