Our main concern was the base level of noise it generated.ĭespite Envisage doing a wonderful job of reducing this noise in post-capture image processing, the main thrust of CCD imaging is to collect a raw image that’s as pure and noise-free as possible. It’s also very tempting if you already have a Meade AutoStar-controlled scope, plus it can be successfully used as an auto-guider – select a target object and the software will make the scope track it. 8'', 10'', 12'', 14'', 16'' Schmidt-Cassegrain Telescopes 7'' Maksutov-Cassegrain Telescope with Autostar II Hand Controller. #How long has meade autostar ii been out manual#This is a great camera if you’re intending to start out in CCD imaging, but don’t really want to get your hands too dirty with the technicalities. View and Download Meade LX200GPS-SMT technical manual online. It may also help if you’re using an equatorial mount with poor polar alignment. The field de-rotator corrects the star trailing that occurs when using an altaz mount which, by default, doesn’t mimic the natural rotation of the sky. This improves image resolution, increases the image dimensions and acts as a field de-rotator, as long as your telescope is controlled by AutoStar. Then, when you take an image, Envisage looks for the dark frame with the closest temperature match and subtracts it automatically to get rid of the noise – a really nice touch.Īnother clever innovation is the use of a software routine called ‘Drizzle’. This data is also recorded against dark frames whenever they are generated. These are essential for lowering the camera’s noise levels.Ī sensor inside the camera takes the temperature of the chip and displays the data on your computer screen. It puts a lot of emphasis on dark frames – images taken with the scope’s lens cap on, that identify any noise present on the CCD chip. Nail the noiseĮnvisage is a clever program geared towards getting you the best image possible. The last item is especially useful if you don’t already own image-processing software and are about to embark on CCD imaging. There’s a planetarium program that moves an AutoStar telescope to point at whatever’s on the screen, a camera-control program called Envisage, and a well-equipped image-processing application.
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