M22 Globular Cluster in Sagittarius

[Screwdriverone (Chris)]

Hi Again,

Here is my latest effort processing M22 in Sagittarius.

I tried something different and cropped off the edges and resized.

See what you think, and thanks for stopping by. Comments and criticisms welcome.

Image Details:

Subject: M22 Globular Cluster
Telescope: Black Diamond 200mm Reflector @ F5 on HEQ5 Pro
Camera: Canon 1000D
Capture: Canon EOS Utility
Guiding: No
Frames: 7 x 30 second at ISO 800, 1 x Dark Frame
Processing: Registax 5 only

Here is a link to a less compressed JPEG (2 Meg)

Thanks for looking

Cheers

Chris

[Dennis]

Hi Chris

A lovely image, especially for a non-auto guiding system. I like the setting of M22 amidst the wider spaced stars of the Milky Way. There seems to be some slight coma in the corners, but I suspect this is unavoidable given the larger sensor area of the Canon.

Cheers

Dennis

[Screwdriverone (Chris)]

Hi Dennis,

Yes, I did cutoff a fair bit of the outside to remove most of the coma, but I think some of this was due to slight tracking errors in the drive, not sure if I should run the PEC training?

The HEQ5 has an autoguiding port, I just haven't got to configure and use it yet.

Baby steps...

Cheers

Chris

[mldee (Mike)]

Are you using the MPCC yet Chris? Sorry, just read your M20 post. Do you have/need the T extender with the 1000d. Total spacing to your sensor from back of the MPCC should be 55mm, and you have 44mm from sensor to front of the bayonet mount flange on the camera. That means 11mm to be made up somewhere. An el cheapo Eos to T adaptor is not that far off.....

[Screwdriverone (Chris)]

Hi Mike,

No, not using the MPCC yet, I only have the T-ring screwed on to the 2" flange thread after removing the 1.25" focuser barrel. I am not sure the best way of connecting the T Ring to the MPCC as I couldnt see how to do that with what I have, perhaps the spacer you mentioned is what I need.

Not sure if the coma is from the F5 or due to the stars wobbling a bit on the drive. I noticed in each run of 10 images, I had to chuck away about 3 due to blurred stars. Strange that it was so periodic, some were GREAT, by flicking through each saved image in a viewer, I could tell which ones weren't going to cut it.

I think the focus was pretty good, I didnt change it the entire time I collected M8, M20 and M22.

I tried a quick look at NGC253 in Sculptor when it rose but with 30 sec subs, it was lost in the Sydney Skyglow from the East, need to wait until its at the Meridian.

Not bad for a newbie hey?

Cheers

Chris

[bmitchell82 (Brendan)]

Not a bad little glob there Chris! slowly slowly and everything will come together

[Jen]

nice one Chris not bad for a noobie at all baby steps alright i dont think i will ever get up from crawling
These guys in here make it look so easy

yep now you better put an observatory on that long list of yours

[Hagar (Doug)]

Nice image Chris. Some problem there but from reading the other posts it looks like you are well on your way to working through them. Best to take small steps and move on to the next when you are happy.

Well done.

[jjjnettie (Jeanette)]

I think it's fantastic.
You're coming along in leaps and bounds.
Once you're up and guiding there will be no stopping you!. Don't forget to indicate as you over take me.

[renormalised (Carl)]

Nice image, Chris. Resolved to the core and not overcooked. Nice pinpoint stars in the centre, but a little coma as mentioned. Still, a very good image for the setup you've used. Well done

[Screwdriverone (Chris)]

Originally Posted by bmitchell82

Not a bad little glob there Chris! slowly slowly and everything will come together

Thanks Brendan, Slowly is an understatement... I havent done ANYTHING since the first imaging session where I took the three pics I posted, still havent fixed the collimator either. Hopefully on the weekend this rain will stop and I can have another go. Thanks for the comments.

Originally Posted by Jen

nice one Chris not bad for a noobie at all baby steps alright i dont think i will ever get up from crawling
These guys in here make it look so easy

yep now you better put an observatory on that long list of yours

Jen, Yes, I have been thinking a pier might be the go, then I can trundle out, slot the head on, connect up the lappy and image from inside where its nice and warm...mmmm....toasty!
Cheers

Originally Posted by Hagar

Nice image Chris. Some problem there but from reading the other posts it looks like you are well on your way to working through them. Best to take small steps and move on to the next when you are happy.

Well done.

Thanks Doug, Yeah, by no means a ripper, but I am happy with this first imaging run, especially since I havent joined the dark side of the force as yet as I am trying to figure out how to mount my 5" as a guide scope on the top of the tube rings for now. Credit hold from the missus so no special guide scope unless I can scrounge one together from what I have. I appreciate you stopping by to have a look and just love getting compliments, thanks.

Originally Posted by jjjnettie

I think it's fantastic.
You're coming along in leaps and bounds.
Once you're up and guiding there will be no stopping you!. Don't forget to indicate as you over take me.

Hi Jeanette, don't worry, I wont kick up too much dust as I pass, only so you can check out my tailgate as I head off into the distance
Cheers

Originally Posted by renormalised

Nice image, Chris. Resolved to the core and not overcooked. Nice pinpoint stars in the centre, but a little coma as mentioned. Still, a very good image for the setup you've used. Well done

Thanks Carl, Another thing to sort out is the MPCC fitting. Next time out for sure, then no coma and another little step forward I hope. Already have it, so its just a matter of checking if I can focus with it in or not..
Not a bad first go for a glob I reckon too.

Wow, so many responses, I wasnt sure if anyone looked in this forum, its great to hear from you all and the encouragement and comments/critiques are very welcome. Thank You all.

Cheers

Chris