Michele Campini:I noticed when processing my latest image today that a lot of my subs had elongated stars that were very noticeable so I had to throw out quite a few. My guide scope was a bit loose on the first night so the likely candidate was differential flexure. I don't think that was the only issue though.
I hadn't weighted down the carbon fibre tripod and given how light the AM5 mount is, particularly with a Redcat 51 on top, it occurred to me that this could be a problem with any amount of wind or vibration.
As I was also imaging with the Redcat 51 and 2600MC Pro the images are under-sampled so Ive been aiming to collect a lot of subs to facilitate drizzle integration in Pixinsight. I was dithering every sub frame and I noticed it would take my guiding a long time to settle down after dithering. I also feel like this was affecting my guiding performance and the numbers were fluctuating from 0.6 ArcSeconds up to 2-3 ArcSeconds.
I'm aware of the complexities of guiding but I'm just curious if anyone has faced particular challenges with ASIAIR/AM5 guiding in this respect?
I used a 130/900 triplet Apo on my AM5 without counterweight guiding at 0.4-0.5 without any problem.
I use short guiding exposure, 1 sec or sometime less.
When driving is worse than 0.5 it is because there was a small earthquake (as you can see in the graph). It's true, I'm not joking.
I get a awful lot of earth quakes near me ;(
