bluelight
Established
I have been reading on adjusting the ranbgefinder on R-D1 and my camera is also front focusing at least on close range.
Before I tried the adjustment, would like to confirm a few things:
1. My lenses are LTM through M adapter and some lenes do not align exactly at 12 o'clock. Should I shim the adapter before the adjustment to make sure that it is not an adapter issue?
2. Do I need a reference ( proven focusing correctly ) lens to perform the adjustment?
3. Do I have to adjust both Infinity and close range together or I can just adjust the close range?
4. Should I always use the 1 M measurement as the baseline for close range adjustment?
It seems quite consistent that all three of my lenses are front focusing....
Thanks,
Ed
Before I tried the adjustment, would like to confirm a few things:
1. My lenses are LTM through M adapter and some lenes do not align exactly at 12 o'clock. Should I shim the adapter before the adjustment to make sure that it is not an adapter issue?
2. Do I need a reference ( proven focusing correctly ) lens to perform the adjustment?
3. Do I have to adjust both Infinity and close range together or I can just adjust the close range?
4. Should I always use the 1 M measurement as the baseline for close range adjustment?
It seems quite consistent that all three of my lenses are front focusing....
Thanks,
Ed
RichC
Well-known
1. Depends on the lens - some were designed to align the scales at an angle, I believe (e.g. all my Canon lenses are at about 11 o'clock. This makes NO difference to focusing accuracy - do not shim.
2. Ideally yes, so you know that you have at least one lens in perfect adjustment. However, unless you're using old lenses or ones prone to poor quality control (e.g. Soviet ones), the fact that all of your lenses front focus points to your R-D1 needing adjustment - esp. if your lenses are modern, decent ones (e.g. CV, Leica, Zeiss).
3. Depends on how much you need to adjust the close focus - if it's just a little, then infinity focus may be unaffected. But you must check infinity focus - making one type of adjustment will affect the other (even if it's - hopefully - negligible).
4. Doesn't have to be exactly 1 m - near will do. All you want to do is to ensure that at close distances, the plane of focus is exactly where the camera focus patch says it ought to be. So, to make this easy, the depth of field needs to be as narrow as possible (widest aperture, closest subject distance).
You'll end up faffing about for a few hours, doing and redoing test shots, so give yourself a whole morning or afternoon.
Also, the description of what the adjustment screws do on my website is correct...
2. Ideally yes, so you know that you have at least one lens in perfect adjustment. However, unless you're using old lenses or ones prone to poor quality control (e.g. Soviet ones), the fact that all of your lenses front focus points to your R-D1 needing adjustment - esp. if your lenses are modern, decent ones (e.g. CV, Leica, Zeiss).
3. Depends on how much you need to adjust the close focus - if it's just a little, then infinity focus may be unaffected. But you must check infinity focus - making one type of adjustment will affect the other (even if it's - hopefully - negligible).
4. Doesn't have to be exactly 1 m - near will do. All you want to do is to ensure that at close distances, the plane of focus is exactly where the camera focus patch says it ought to be. So, to make this easy, the depth of field needs to be as narrow as possible (widest aperture, closest subject distance).
You'll end up faffing about for a few hours, doing and redoing test shots, so give yourself a whole morning or afternoon.
Also, the description of what the adjustment screws do on my website is correct...
bluelight
Established
Thanks Rich ...