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11
Astrophotography / Re: Quick Cocoon IC5146
« Last post by Carole on Yesterday at 14:04:55 »
Yes, good comparison.

How do you Bin DSLR data Mark?

Carole
12
Astrophotography / Re: Quick Cocoon IC5146
« Last post by MarkS on Yesterday at 13:53:20 »
Snap. 

I didn't realise you were planning to do this so soon after your recent comments on mine.

As always, a lovely image Mark, I do think this target is better appreciated close up.

Now I have seen yours I have gone back and tweaked my "close up" some more, (see my post) :lol:

Carole

Thanks.  Your version is looking even better now!

My plan is to repeat some of my C11 images from 10 years ago to show the difference that the latest sensors can make.  The Cocoon is one of those. 

Here is the one from 10 years ago taken with the modified Canon 350D: 



It used nearly 3 hours of data and I still had to bin it right down just to reduce noise to an acceptable level.  The new image shows fainter structures and many more stars and the imaging time was much shorter.

Technology moves on ...

Mark
13
Astrophotography / Re: M33 Triangulum
« Last post by Carole on Yesterday at 13:53:19 »
I am comparing same scopes with standard DSLR V Mono CCD same sky conditions  Mark, not different people's data, equipment, sky conditions and skills. 

All I know is I can get far better images with a mono camera than a coloured camera, be it OSC or DSLR.  when I first got a Mono camera, I did same targets on 2 different nights - one night with the DSLR and the next night with the Mono camera for comparison, and was blown away by the difference in the two. 

I would NEVER go back to DSLR DS imaging after using a mono camera with the odd exception for example if I was on holiday and had to take the skytracker instead of the full regalia.

Yes the capture and processing is far more complex I agree with that.  It did take me quite a while to get to grips with it all, but I enjoy the processing anyway. 

Your A7S is a magical camera, and probably matches many Cooled CCD cameras, coupled with your Tak Epsilon and your incredibly good skills is combined a killer combination.

But the downside is it doesn't do narrowband and some data I suspect is not visible to it, though would love to be proved wrong. 

But we are talking here of comparing your bog standard Modified DSLR that Roger has to a cooled CCD camera.

By the way, Roger has just rung me.  He has bought a ZWO ASI mono camera which will mean short subs for him as it has a CMOS chip.  This CMOS technology has come on the market after I had bought my Mono cameras. 

Carole

14
Astrophotography / Re: M33 Triangulum
« Last post by MarkS on Yesterday at 13:30:40 »
Quote from: Carole
You can get much more detail out of a mono camera Mark, that is unless we have your expensive kit and skills.  It's also easier to use, though the processing is somewhat challenging at times.

I could not get the detail that I do with a modified DSLR.

You think a mono camera with the attendant complexities of a filter wheel is easier to use than a one-shot-colour?

Fair enough that you say my kit is expensive but it's cheaper than an Tak FSQ refractor with cooled Atik 11000 mono camera plus filter wheel and filters.  So let's do a comparison.

Take a look at this fantastic image of Tom Donahue's (a collaborator of Ollie Penrice) taken over 25 nights in Spain and using 60 hours (yes 60 hours!) of data taken with the above mentioned equipment:
https://www.space.com/17553-night-sky-photo-nebula.html
Let's be charitable and call it 30 hours of data because he says his first 30 hours of data was of low quality.

Now compare it with mine taken in France last year (lower in the sky) which uses just 80minutes (yes just over 1 hour) of data and an uncooled DSLR:
http://www.markshelley.co.uk/Astronomy/2017/antares.html

Agreed my image has a bit less H-alpha but for a given level of expenditure would you prefer to use 25 nights to take a single image or 2 nights?

Technology moves on ...

Mark

P.S. In Spain I would have captured that data in a single night
15
Astrophotography / Re: Quick Cocoon IC5146
« Last post by Carole on Yesterday at 12:49:46 »
Snap. 

I didn't realise you were planning to do this so soon after your recent comments on mine.

As always, a lovely image Mark, I do think this target is better appreciated close up.

Now I have seen yours I have gone back and tweaked my "close up" some more, (see my post) :lol:

Carole

16
Astrophotography / Re: M33 Triangulum
« Last post by Carole on Yesterday at 12:43:44 »
You can get much more detail out of a mono camera Mark, that is unless we have your expensive kit and skills.  It's also easier to use, though the processing is somewhat challenging at times.

I could not get the detail that I do with a modified DSLR.

Carole
17
Astrophotography / Re: Seagull Nebula AAPOD on 16th July 2018
« Last post by Carole on Yesterday at 12:40:01 »
Thanks Noel
18
Astrophotography / Re: NGC6888 Crescent Emission Nebula - Updated
« Last post by Carole on Yesterday at 12:38:59 »
Much better Roger, but perhaps you could mention it is a replacement in the first post as it makes all our comments about it being too dark look odd.

Thanks

Carole
19
Astrophotography / Re: NGC6888 Crescent Emission Nebula - Updated
« Last post by NoelC on Yesterday at 12:15:09 »
Wow - it's red!
I've been fiddling around trying to capture it (have some un-processed data) but hadn't realised it was pretty much one colour.
Well done Roger, nice image.

Noel
20
Astrophotography / Re: Seagull Nebula AAPOD on 16th July 2018
« Last post by NoelC on Yesterday at 12:12:37 »
Sorry Carole; missed your original post;
This image is stunning - a very well deserved win.

Noel
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