Thierry
New member
I just want to intervene to add some details about the right lens(es) to take for shimming.
An ideal focal length would be around 70mm, e.g. the Schneider Apo-Digitar 5,6/72mm L
It is correct that the short focal length lenses are not ideal for shimming, because they are not corrected for "flatness".
Short focal length lenses, although these are very sensitive to the position of the sensor, respectively to the focus, make it difficult to judge the focus differences at infinity
The longer focal length, understand above 100mm, make it as well difficult to shim correctly, because they are less sensitive to focus differences with a few 1/100th differences.
Thierry
An ideal focal length would be around 70mm, e.g. the Schneider Apo-Digitar 5,6/72mm L
It is correct that the short focal length lenses are not ideal for shimming, because they are not corrected for "flatness".
Short focal length lenses, although these are very sensitive to the position of the sensor, respectively to the focus, make it difficult to judge the focus differences at infinity
The longer focal length, understand above 100mm, make it as well difficult to shim correctly, because they are less sensitive to focus differences with a few 1/100th differences.
Thierry