crwdns2934241:0crwdne2934241:0 Dan

crwdns2934249:0crwdne2934249:0:

You need a means to measure (without touching the CCD) the distance to the lens mount so it is optically parallel to each other. And of course this is to the hundredths of mm otherwise a part of the image will not be in focus when the aperture is fully dilated (open).

crwdns2915684:0crwdne2915684:0:

open