This is a great accessory for precisely collimating your Newtonian reflector telescope to achieve the best image the telescope can deliver, especially for faster systems (f/5 or lower).
This device allows you to adjust both of the telescope's mirrors with a simple, precise, two-step procedure. The collimator fits in the 1.25" focuser and emits a red laser beam into the telescope. Tilt the secondary mirror so that the red laser dot hits the center of the primary mirror. Then tilt the primary mirror so that the return beam hits a silver plate angled at 45 degrees in the collimator's window. Adjust the mirror until the return beam lines up with the original beam. That's it!
The collimator is made of strong anodized aluminum and includes batteries. This new deluxe model now includes a rubber grip placed around the laser assembly within the collimator housing that helps the collimator retain its alignment if bumped or when batteries are replaced.
Instructions for collimation with Newtonian telescopes can be downloaded here.
Optimised for Sky-Watcher superfast f/4 Quattro imaging Newtonians, delivering stunning wide-field views with pinpoint stars to the edge of the flat field. Magnification remains unaltered. Features a 4 x element design with one element made from FPL51 ED glass. Requires 55mm back focus. Image height 28mm. Outside diameter 50.8mm. A suitable M48x0.75 adapter is required to match your camera. Sky-Watcher manufactured Canon and Nikon M48x0.75 adaptors are available.
I am a beginner and bought this to make sure my scope was set up correctly.
The slight problem I had was that the batteries supplied where dead but when I was able to buy new ones it worked very well.
ข้อดี: Well constructed and very easy to use.
ข้อเสีย: Maybe the led is too bright ( new batteries ) .. would be nice if it could be adjusted.
The ZWO ADC actually does work well. It takes a bit of practice and some searches through the internet on how to use, but if planets are low in the sky the ADC will provide a better image.