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Check collamination achroma3/22/2023 The best way to check collimation is with a star, either real or artificial This is Sirius I want to talk about using the actual things we are trying to photograph, in the real conditions, in the field (or your backyard): a star. So, I don’t want to talk about those other tools right now. While the tools will usually get you pretty close, and sometimes, if you’re lucky and good, nearly dead-on, that’s usually where it ends. It’s difficult, it can take a LONG time until you get the hang of it. I’ve used two different laser collimators, I’ve done some modifications using paper and special caps, and even used my eyes to try and get it right. There are a few different collimation tools available. How do you check collimation? A laser collimator If your telescope is not properly collimated, it will be impossible to properly focus, no matter the sky conditions. Without getting into the crazy but cool scientifical physics and math of it, collimation is, simply put, the physical alignment of your telescope’s optics. This is NOT a full collimation tutorial, because you may also need to adjust the primary mirror, if things are really bad, but I’m not covering that here. While all optical instruments need collimation, refractors are typically not able to be adjusted outside the factory. Like a Newtonian, Ritchey Chretien, SCT, etc. NOTE: This quick tutorial is geared toward telescopes with mirrored optics, specifically those with a secondary mirror that allows for adjustment.
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