The Apertura AD series presents a terrific value. (A cheshire sight tube/collimating eyepiece is more accurate, believe it or not and a star-test collimation, while difficult to learn, can result in perfect collimation.) The biggest difference will come down to price, altitude bearing style, and perhaps most importantly, availability. You could buy a battery powered fan for your dob second-hand if that’s something you really wanted out of the Apertura AD dob and there’s better ways to collimate than by using a laser collimator. They have red dot finders instead of optical finderscopes, though.Įach of these dobsonians are much more alike than unlike one another they all have the same apertures and focal lengths, they all have the same high quality optics, and they all have inter-compatible accessories. But they have excellent large altitude bearings and the base can be broken down and packed flat. Explore Scientific FirstLight: A bit of an “odd one out.” These have somewhat strange focuser mechanisms and the 6” has an oversized mirror support.This can be useful when transporting a telescope in a small car it can be the difference between stuffing the tube in the trunk and the base in the back seat, or stuffing the tube in the back seat and the base in the front passenger seat and having no passengers at all. SkyWatcher FlexTube: Same tension bearings as Classic, but with collapsible tube gimmick to allow you to save about 13” of vertical space when transporting.SkyWatcher Classic: Highly comparable to Apertura AD series, except with inferior tension bearings and fewer accessories.Red dot finders instead of optical finderscopes. ![]()
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