Quote:
Originally Posted by casstony
Hi Calvin, if you haven't done any DSO imaging it's easier to start with a shorter focal length scope - you'll get good results more quickly and avoid frustration.
You can start with 30 to 60 second exposures but eventually you'll want to learn to guide to enable exposures of a few minutes.
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X2. An 80mm is a pretty good place to start, it gives you a nice field of view (like being able to get the entire Rosette Nebula). Look wider than the Skywatcher Esprit, as it's abit expensive compared to other well know 80mm triplet APO. At the very least check the Photoline scopes offered by Teleskop Services. If the cost doesn't concern you just buy from a local retailer. Get a reducer/corrector, unless your buying a dedicated astrograph type APO (which tend to have them built in). A reducer/corrector will give you a faster scope and slightly wider flat field). A scope like the one below is perfectly fine with just a flattener attached as it is fast for a triplet.
An example:
https://www.teleskop-express.de/shop...P-Focuser.html