Andrew Celestron CPC-1100 Celestron NexStar 8SE OTA on Sirius EQ-g mount running EQMOD Orion ST-80/SSAG guiding package Coronado PST on iOptron SmartEQ Imaging Source DBK21AU04 and DMK41AU02 Mallincam Hyper Color imager My astronomy blog: http://andysastro.blogspot.com Norman OK (nearest CSC station) 73 de AE5YJ
Others may disagree. Your millage may vary. Void where prohibited by law.
Quote:I would think if it were the sensor, that I would see them when using native focal lengths, no? As far as the issue with the 2.5X powermate, that was in internal reflection and I'm not seeing that issue with mine. I've tried a normal 2X barlow and still got the rings.
Observing the Sun with complex optical systems since 1966, and still haven't burned, melted or damaged anything. Not blind yet, either!
Quote:Any pictures? At various focal lengths... That will help us diagnose you the best course of action...
Quote:Try a lens cap, works every time. But seriously, the problem may be in the camera, I'm sorry to say. This sort of fringing occurs in CCDs and is more pronounced with longer (red and IR) wavelengths. Some chip designs are worse than others and even with the same design there is variation from one chip to the next. If that's the case then tilting the camera is your best option.
Quote:No, registax should automatically compensate for it. Often the best way to get the drift you need is just to do a poor polar alignment, it will naturally drift for you then...