Elongated Stars – Problem solved
Early last week, in my quest to find the source of my elongated stars problem, I was doing research on the internet when I came across a paper by Craig…
Still suffering from elongated stars due to differential flexure
This week, the weather has been very good...it's the fourth clear night in a row. Futhermore, I am attending a CCD conference on Saturday...what more could you ask to satisfy an astrophotographer? On…
Elongated Stars – Focuser problems
Last night, in order to try to reduce the differential flexure problem that have been plaguing me, I replaced the guiding camera 2" extension tube I was using with the ED80T CF…
Elongated Stars – Differential Flexure Confirmed
October 20th I imaged LBN640 taking 45 X 4 minutes sub-exposures at ISO 800. Using DeepSkyStacker and Maxim DL, I did some analysis on the sub-eposures produced during the session. Here is…
Elongated Stars – Further Analysis
Monday night, I decided to conduct a quick test to confirm whether or not the modifications (IR filter removal and cooling) of my Canon 350D had indeed introduced tilt of the CMOS…
Elongated Stars – Improvements but still suffering from tilt
Yesterday, I took the time to disassemble the cooled 350D from the main OTA and here is what I did: Inspected the T-Ring to make sure that the central portion of…
Elongated Stars – Not Resolved but have more clues
After fixing the Starshoot Autoguider Camera, I re-installed everything and did some tests again (i.e. took 60, 120, 180 and 240 subs while guiding). To my great deception, all the subs showed…
The quest continues to get rid of elongated stars
While searching for a solution to the elongated stars in my images online, I stumbled on a Cloudy Nights thread where a gentlemen realized that his QHY5 guiding camera had a…
Hopefully, it looks like flexure was the culprit.
2 days ago, I reverted back to the piggy-back installation and did a 4 minutes exposure with autoguiding enabled. I no longer had elongated stars in my images. However, with…
Still stuck with Elongated stars.
Tonight here is what I did to try to fix the elongated stars in my images following the changes I've made on my setup: Tightened the Guider focuser tension screw…