therion82

M31 - the Andromeda galaxy Exposure time: 30x45sec telescope: sw 130pds mount: celestron cg5 camera: canon 1100d from bortle 6 sky, in Athens, Greece Stacking and processing with Siril

@Cornelius Varley thanks for the response! how this adjustments can be done?

I have an old celestron cg5, upgraded to goto, with the iOptron kit (https://www.ioptron.com/product-p/8400.htm). After a few months of not using it, I set it up, and when I started the alignment , I noticed a weird sound and no movement in the dec axis. After some seconds the sound stopped, but still no movement was occurring. Using my flashlight I saw that the two gears were not touching, as you can see in the attached photo. Any suggestions/comments? Can it be repaired? Looking forward to your responses

@david_taurus83 yes indeed, it's like having a clip like filter!

I think that Baader Protective t ring, is the more expensive version of this https://www.firstlightoptics.com/adapters/flo_2-inch_T_adapter.html , right guys?

@dark knight : this seems a really nice, and inexpensive solution. But as Steve stated above, can this affect the ability to achieve focus? What do you think?

Thanks Steve, for the response! So what do you think are my options here? Only clip filters? Could a coma corrector do the trick?Meaning can it fit inside there?

I am considering buying a used 2in filter, but I am bit troubled, on how I can attach this on my current AP setup. I am using a skywatcher 130pds, and a canon dslr. I connect the dslr to the scope with a t-ring that I bought extra, and an adapter that was included in the telescope's original package, as you can see in the attached photo. So the question is how am I going to attach the 2in filter?Am I going to need something extra?

Hello all, I am actively looking for a cls filter, since I try AP from a high light polluted area, with a stock (un-modded) dslr camera. So looking for a cls filter seems a quite logical decision, right? But is it? I discovered lots of flame threads over the internet about cls filters. Some of them stating that these filters mess with the white balance, and coloring in general, making processing tricky and difficult. Others that didn't do any difference, or make the whole thing worst. Others that are true saviors, and others stated that it makes sense only for modded dslrs, meaning the ccd equivalent of these filters. What do you think?

Andromeda on September 2018 Less than 5 minutes total exposure time, with a skywatcher 130pds on az synscan go to mount, and a 1100d canon at iso 800. Location:Marathon, Athens, Greece

Adding my first successful(?!?!?!) try with astrophotography. From super light polluted Athens/Greece, I present you M31. I took this on September 2017 Only 6 lights @21 seconds, with 1600 iso. Meaning a total of 2 minutes. Telescope : skywatcher 130 pds mount: skywatcher synscan goto camera: canon 1100d (un-modded) DSS was used for stacking and cs6 for streching