The Southern Crab Nebula - Page 2

Andy01 (Andy) · #21 03-05-2017, 06:28 PM

Mag 14.5 and tiny? Man oh man that's a challenge

You sure you're names' not "Masochist Mike"?
Very impressive result, well done!

Makes you wonder what it would look like if we were located much closer, like the Helix for example?
Top stuff Mike

Tony_ (Tony) · #22 03-05-2017, 07:43 PM

Superb image Mike!
It's incredible how much detail there is in such a small object with a relatively low FL - certainly a credit to your ability.

Tony.

gregbradley · #23 04-05-2017, 08:23 AM

Great work there Mike. Not for the faint hearted.

Greg.

strongmanmike (Michael) · #24 04-05-2017, 02:38 PM

Quote:

Originally Posted by Andy01

Mag 14.5 and tiny? Man oh man that's a challenge

You sure you're names' not "Masochist Mike"?
Very impressive result, well done!

Makes you wonder what it would look like if we were located much closer, like the Helix for example?
Top stuff Mike

Masochist indeed but it's fun to image on the edge

I agree, this might look rather awesome if it were over 10X closer

Quote:

Originally Posted by Tony_

Superb image Mike!
It's incredible how much detail there is in such a small object with a relatively low FL - certainly a credit to your ability.

Tony.

Cheers Tony, the AG12 can deliver when it wants too

...and the seeing lets it

Quote:

Originally Posted by gregbradley

Great work there Mike. Not for the faint hearted.

Greg.

Cheers Greg

SimmoW (SIMON) · #25 04-05-2017, 04:19 PM

Treś exotique mon amie!!

French for 'you bloodybewdy!

strongmanmike (Michael) · #26 04-05-2017, 05:05 PM

Quote:

Originally Posted by SimmoW

Treś exotique mon amie!!

French for 'you bloodybewdy!

Ah ha, grazie molto amigo!! Italian for 'thanks a lot mate'

marc4darkskies (Marcus) · #27 04-05-2017, 11:09 PM

22 hours integration on something that small huh? Impressive, extreme and interesting for sure, but I don't think I'll add it to my target list - even at 3.1m FL.

alpal · #28 05-05-2017, 10:12 AM

Hi Mike,
that's an impressive result on such a small dim target.
As I've said before - small targets are worth stacking using 3 x Drizzle in DSS.
Did you try that this time to extract that tiny bit of extra detail?

cheers
Allan

strongmanmike (Michael) · #29 05-05-2017, 10:16 AM

Quote:

Originally Posted by marc4darkskies

22 hours integration on something that small huh? Impressive, extreme and interesting for sure, but I don't think I'll add it to my target list - even at 3.1m FL.

Meah...you just jealous

....I went to specsavers

Mike

strongmanmike (Michael) · #30 05-05-2017, 10:47 AM

Quote:

Originally Posted by alpal

Hi Mike,
that's an impressive result on such a small dim target.
As I've said before - small targets are worth stacking using 3 x Drizzle in DSS.
Did you try that this time to extract that tiny bit of extra detail?

cheers
Allan

Cheers Al

..nah no drizzle (sorry

), ain't got that capability in the software I use

...no AO and not even PEC

Mike

alpal · #31 05-05-2017, 11:23 AM

Quote:

Originally Posted by strongmanmike

Cheers Al

..nah no drizzle (sorry

), ain't got that capability in the software I use

...no AO and not even PEC

Mike

Hi Mike,
DSS - Deep Sky Stacker - which does 3 x Drizzle - is free!

Is it even possible to use AO with your Newt?
There is not much back focus on Newts but I suppose some people have done it?

I still haven't implemented my idea to close the camera shutter
whenever the guide graph goes out by more than say +/- 0.5 divisions
& then open it again when back in spec.
Then - a problem with a mount - a guide error wouldn't matter.
I am hoping that QHY will make it possible with software -
that would be nice.
I think all camera software should enable that -
it's so simple yet not one camera manufacturer does it.

So yes - there is always room for tiny improvements but
your results are amazing.

cheers
Allan

strongmanmike (Michael) · #32 05-05-2017, 12:07 PM

Quote:

Originally Posted by alpal

Hi Mike,
DSS - Deep Sky Stacker - which does 3 x Drizzle - is free!

Hmmm? maay bee...

Quote:

Is it even possible to use AO with your Newt?
There is not much back focus on Newts but I suppose some people have done it?

Well, I only have 78mm back focus available, probably not...?

Quote:

I still haven't implemented my idea to close the camera shutter
whenever the guide graph goes out by more than say +/- 0.5 divisions
& then open it again when back in spec.
Then - a problem with a mount - a guide error wouldn't matter.

My system hardly ever goes over 0.5 pix anyway

only on poor seeing nights and then I just take the RGB

Quote:

So yes - there is always room for tiny improvements but
your results are amazing.

I agree and cheers mate

codemonkey (Lee) · #33 06-05-2017, 07:56 AM

Looks more like a spider to me! I like the full-frame, gives you some perspective and indicates how small the target it is. A solid effort, Mike, and I don't think you'll be topped on this one for some time, at least by amateurs.

alpal · #34 06-05-2017, 09:00 AM

Quote:

Originally Posted by strongmanmike

Hmmm? maay bee...

Well, I only have 78mm back focus available, probably not...?

My system hardly ever goes over 0.5 pix anyway

only on poor seeing nights and then I just take the RGB

I agree and cheers mate

Hi Mike,
you have all the data - Drizzle would be worth a go but then again
you have a small pixel size on your camera so you're not under-sampled.

78mm is not a lot of back focus but AO may still be possible.

0.5 pixels?
My system will run quite happily at 0.5 pixels on the guide graph for 5 minutes or more
but then it will have an occasional little spike that goes above 1 pixel.
I find that annoying as I know my data is being corrupted when that happens.
How nice would it be to close the shutter during such events?

cheers
Allan

Paul Haese · #35 06-05-2017, 10:16 AM

Wow that is a small target. Nice image of it at 150%, guide graph is impressive for such a large scope on an NJP (which is a great mount but a bit overloaded). You've obviously got that system well tuned and hence the sharp detail on these tiny targets.

strongmanmike (Michael) · #36 06-05-2017, 12:21 PM

Quote:

Originally Posted by codemonkey

Looks more like a spider to me! I like the full-frame, gives you some perspective and indicates how small the target it is. A solid effort, Mike, and I don't think you'll be topped on this one for some time, at least by amateurs.

Thanks Lee, yes definitely a spider in there too

Quote:

Originally Posted by alpal

Hi Mike,
you have all the data - Drizzle would be worth a go but then again
you have a small pixel size on your camera so you're not under-sampled.

78mm is not a lot of back focus but AO may still be possible.

0.5 pixels?
My system will run quite happily at 0.5 pixels on the guide graph for 5 minutes or more
but then it will have an occasional little spike that goes above 1 pixel.
I find that annoying as I know my data is being corrupted when that happens.
How nice would it be to close the shutter during such events?

cheers
Allan

Once the camera has sensed the short spike in the guide star then it has already happened and been recorded so how will closing the shutter help? If you get times where the guide star moves out for a say 10 or 20sec though, then I can see closing the shutter a useful function then..? But this just doesn't happen for me, ever, my guide star plot is only affected by seeing so it is a tight ball of dots when the seeing good and less tight ball of dots when the seeing is poor

Quote:

Originally Posted by Paul Haese

Wow that is a small target. Nice image of it at 150%, guide graph is impressive for such a large scope on an NJP (which is a great mount but a bit overloaded). You've obviously got that system well tuned and hence the sharp detail on these tiny targets.

Well, the NJP will really be put to the test soon, when I mount another 10kg of FSQ, Proline16803, MMOAG and Lodestar on the side

...but given it handled THIS perfectly well, I am quietly confident it will soldier on this time too. I would be worried if I was doing multiple slews a night like with a automated system or SN search program but I only do one slew to my target and then it is sidereal tracking from there, all night.

That's the theory anyway

Mike

Geoff45 (Geoff) · #37 06-05-2017, 12:28 PM

That's really impressive Mike. There is so much more satisfaction in getting a really difficult target to show up well rather than another brilliant shot of the ol' EC.
Geoff

strongmanmike (Michael) · #38 06-05-2017, 07:24 PM

Quote:

Originally Posted by Geoff45

That's really impressive Mike. There is so much more satisfaction in getting a really difficult target to show up well rather than another brilliant shot of the ol' EC.
Geoff

Well thank ya Geoffrey, there comes a time where one must challenge one self aaaand shoot for some of the other several hundred thousand objects worth shooting out there

Mike

Slawomir (Suavi) · #39 07-05-2017, 10:01 AM

Spectacular result Mike, excellent processing and a splendid image. Seems that a visit to Specsavers served you well...

strongmanmike (Michael) · #40 07-05-2017, 02:04 PM

Quote:

Originally Posted by Slawomir

Spectacular result Mike, excellent processing and a splendid image. Seems that a visit to Specsavers served you well...

Cheers Suavi..and maaate the naked eye sky looked really bluudy Amazing on the last night of capture for this...it was like an awakening! Definiely should have gone to Specsavers sooner!

Mike