I just put my preliminary build together and now has a problem. In order to focus the sample has to be really close to the objective (x40). So much that I had to put the premade slide upside down to focus properly and run calibrate.
Does that mean my parfocal distance is not 45mm? (default in build script) Would changing it to 35mm fix this issue? Do I need to print optic part at various setting 35-40-50 to test?
The objective is generic ones from Aliexpress. When I ask for more details the seller sent this:
Which I think is the proper focusing distance!? But x100 should be much shorter right?