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Is a cheshire good enough?
I'm thinking of getting a 6" f/4 scope for astrophotography and wondering if a cheshire would suffice? While I'd love to get some fancy Hotech laser or whatever, I simply don't have the funds for one, and I'm not really scared of a cheshire as I've already used a collimation cap for my dob that I use for visual. Just wondering if a cheshire is accurate enough for f/4.
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