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I'm considering the 250PDS. The main use is visual, and the second is EAA (I currently use a zwo183mm).
What I'm hesitant about is the primary focus. since It's mostly for visual, I'm wondering on how much back focus it has compared to the standard Skywatcher 10" dobsonians? with the standard dobsonias with the same optics and focuser you already need an extension tube for most eyepieces...
Also, there's probably a "bigger" obstruction (bigger shadow on primary)?
Good day fellow gazers at the sky! I recently joined and i would just like to say how wonderful everyone is (a special shout out to George Gearless)!
Can anyone suggest a good reflector within my budget shown in the title? While i'm here i'd just like to say about the app, Nightshift. It is proffesional, clear and tellls you when to observe, and what you can see, for the next year! It also pinpoints your location exactly, so it is really accurate.https://play.google.com/store/apps/details?id=com.waddensky.nightshift. Anyway, that's me done! Thank you all so much for your time
Hi, I've got a Skywatcher Heritage 130p reflector, and if i insert anything less than 10mm eyepiece, the image won't get crisp. I guess it's normal, but as I'm very new to astronomy, I'd like to know what the sharpness depends on exactly.
Is that the focal length (how fast the telescope is? ) or the size of the mirror and how much light it gathers? Or both affect it the same way?
Are things the same with refractors in this regard? Thanks.
Just wondering if anyone out there had upgraded their secondary spider to use one of these CNC secondary cells ? just looking for some feedback to see how much of a difference they make - primarily interested from a collimation perspective, but also interested to see how much it impacts your diffraction spikes.