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If you have to focus past infinity then your infinity is wrong .
Paul, thanks man, this is super helpful. I'll let you know if I figure it out.I can’t speak to the 23mm.
I have the 32 and RM3DI.
I had a set range for the 32 on my IQ260. When I received my IQ3100 I had to get Rod Klukas to adjust the helical to focus negatively around 2. No change to camera or lens. With the IQ4 I am back to positive values. Very similar to what the IQ 260 was. I assume there might be slight tolerance differences in sensor depth but very slight as the movements I describe on a Arca helical are very small
Paul C
Eric, thank you my friend.I’ve definitely noticed a difference in sharpness at formerly hyperfocal witness marks. I’ll experiment further as to where it is now. Glad you pointed this out.
It could just be that your IQ4 back requires a bit different focusing adjustment (shim) than your IQ3 back did.
I haven't noticed an IQ3 vs IQ4 difference for my lenses, but I can't say I ran any rigorous tests at infinity.
Doug, check out the attached image and let me know what you think.If you have to focus past infinity then your infinity is wrong .
^You can pretty easily adjust infinity on the lens. There's a couple of threads here on GetDPI about how to do it.
I have this bookmarked, will see if I can find the other one tomorrow.
https://www.getdpi.com/forum/medium...acks/33610-cambo-sk-35mm-lens-adjustment.html
You can pretty easily adjust infinity on the lens. There's a couple of threads here on GetDPI about how to do it.
I have this bookmarked, will see if I can find the other one tomorrow.
https://www.getdpi.com/forum/medium...acks/33610-cambo-sk-35mm-lens-adjustment.html
Thank you Victor, I'm going to try.If you do plan to adjust the lens stop - which is relatively easy - don't lose any screws. I remember toiling with all of that when I had my 180 but those days are behind me. Regardless I would not fool around with any of that and adjust shims so that you can focus beyond infinity with all lenses and rely on the excellent LCD at 100% pixels for perfect focus.
Victor
Did you buy it new? If there’s been one concern it’s the shims ... and also the decentering if you jolt the lens like the 32HR.
I had a beautiful Alpa mount 23HR that would loosen the front element and behind that was a stack of shims. I never lost or pinched one but it always worried me.