Thu Dec 02, 2021 12:09 am
Well, position has its pros and cons. If you put it vertical, there as higher risk of dust falling into it. I had no problem with the shims keeping it horizontal.
Regarding the shims to keep or take out, many EF lenses have far less precision than PL. You never know before trying a proper collimation.
Now that the cat #19 is out of the bag, test it as much as you can and use the subforum.
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