Question about Optics
When looking at the brighter stars I cannot focus them to a sharp image. They appear fuzzy. Image of a star test on Vega attached (taken with a Watec 120N webcam). Diffraction rings are sparse and mottled. Does not really indicate that scope needs collimation. Can you help please.?
The image shows that the optics are not centered properly. The secondary may be tilted slightly to the 2 o'clock position. When not centered, a focused star will have an astigmatic shape, and not come to a full focus. Also check the mirror and corrector plate for dewing, that will also affect the views.
Posted on Nov 08, 2008
I have had the same problem, but when I got used to the collimation process and which way to turn the adjuster screws life has been much easier for photographing, usung a 7.5mm eye piece for adjusting the perfice circle.
Posted on Aug 20, 2010
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Dec 27, 2016 | Celestron Optics
Apr 03, 2012 | Optics
Feb 22, 2012 | Celestron FirstScope 76EQ (180 x 76mm)...
Jul 29, 2011 | Celestron CPC 1100 GPS (XLT) (70 x 280mm)...
Jul 29, 2011 | Celestron CPC 1100 with Standard Coatings...
May 04, 2011 | Computers & Internet
Jan 10, 2011 | Celestron Optics
Dec 26, 2008 | Celestron AstroMaster 130EQ Telescope
978 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: