NGC1365 Southern Spiral Galaxy CDK17 F4.5 12 hours - Page 2

gregbradley · #21 12-12-2013, 05:16 PM

Quote:

Originally Posted by Ross G

A beautiful galaxy photo Greg.

Closeup with great colour and detail.

Love it!

Ross.

Thanks Ross.

I plan on adding more data next new moon and clear weather.
I think it would be worth it as its in my opinion one of the best images I have gotten out of my CDK17 so far.

Greg.

DJT (David) · #22 12-12-2013, 05:30 PM

Tahts a great image Greg. Detail is quite something.

gregbradley · #23 12-12-2013, 05:36 PM

Quote:

Originally Posted by DJT

Tahts a great image Greg. Detail is quite something.

Thanks David. I am very happy with it as well. I hope it bodes well for future galaxy images that I may be on to a hot setup here.

Greg.

Peter Ward · #24 12-12-2013, 05:49 PM

I'd probably not crop it so close...I think some more surrounding space would take it to the next level.

An excellent rendition.

Enrique · #25 12-12-2013, 06:07 PM

Fantastic image. I am in the process of capturing my own. I hope I come close to yours,

Regards,

Enrique

DJT (David) · #26 12-12-2013, 06:43 PM

Quote:

Originally Posted by gregbradley

Thanks David. I am very happy with it as well. I hope it bodes well for future galaxy images that I may be on to a hot setup here.

Greg.

That's pretty cool. I remember the thread earlier in the year on these Sony chips which was very interesting. Glad you dived in as its clearly working well for you.

Jon (Jonathan) · #27 12-12-2013, 07:04 PM

Wonderful. Beautiful rendition of my favourite galaxy.

Elio · #28 12-12-2013, 08:53 PM

Stunning image, colours and details are lovable

gregbradley · #29 12-12-2013, 10:44 PM

Quote:

Originally Posted by Jon

Wonderful. Beautiful rendition of my favourite galaxy.

Thanks Jon.

Quote:

Originally Posted by Elio

Stunning image, colours and details are lovable

Thanks very much Elio.

Greg.

stevous67 (Steve M) · #30 13-12-2013, 03:02 PM

Beautiful result Greg - well done.

Steve

Paul Haese · #31 14-12-2013, 10:53 PM

Lots of detail Greg, nice colour too. Needs more data though. Still noise present.

LewisM · #32 15-12-2013, 11:17 AM

I agree with Peter - crop is a little tight for my tastes - needs space.

Otherwise, i like it, a LOT! The best 1365 I have seen to date.

gregbradley · #33 15-12-2013, 04:46 PM

Quote:

Originally Posted by stevous67

Beautiful result Greg - well done.

Steve

Thanks Steve.

Quote:

Originally Posted by Paul Haese

Lots of detail Greg, nice colour too. Needs more data though. Still noise present.

Cheers Paul.

Quote:

Originally Posted by LewisM

I agree with Peter - crop is a little tight for my tastes - needs space.

Otherwise, i like it, a LOT! The best 1365 I have seen to date.

Thanks Lewis.
Its a fairly large galaxy so yeah it takes up most of the frame and I can see that would not be what everyone would like.

Greg.

cazza132 (Troy Casswell) · #34 18-12-2013, 12:35 PM

"Also 17 inches at F4.5 and 77% QE actually burns out the core of galaxy NGC1097 in a 10 minute sub! So a lot of photons being recorded.
"
Wow, mate, that just sounds insane! I know DSLRs have the bayer filter (reduces spacial resolution by about SQRT(2), but you need colour filters that would reduce QE with the dedicated astro cam. They are talking 50% QE with the bayer filter on for DSLRs, and DSLRs have quite a well depth also. Yes you can cool a DSLR, but not as much as a dedicated astro cam. Is it the dark frame noise that the super-cooled astro cams have the advantage? Or the flexibility of the use of narrow band filters to reduce star size (maybe irrelevant with galaxies)? Are RAW files really Raw files with DSLRs? Or have I just answered my own questions? Any thoughts with this one? Great shot btw Greg! - You must be stoked with the brute photon capturing capacity of that 17" beast!

David Fitz-Henr · #35 18-12-2013, 05:40 PM

An awesome shot Greg, loads of details there

I think I agree with Mike; shrinking to 75% size reduces the noise but still shows all the detail.

gregbradley · #36 18-12-2013, 07:06 PM

Quote:

Originally Posted by cazza132

"Also 17 inches at F4.5 and 77% QE actually burns out the core of galaxy NGC1097 in a 10 minute sub! So a lot of photons being recorded.
"
Wow, mate, that just sounds insane! I know DSLRs have the bayer filter (reduces spacial resolution by about SQRT(2), but you need colour filters that would reduce QE with the dedicated astro cam. They are talking 50% QE with the bayer filter on for DSLRs, and DSLRs have quite a well depth also. Yes you can cool a DSLR, but not as much as a dedicated astro cam. Is it the dark frame noise that the super-cooled astro cams have the advantage? Or the flexibility of the use of narrow band filters to reduce star size (maybe irrelevant with galaxies)? Are RAW files really Raw files with DSLRs? Or have I just answered my own questions? Any thoughts with this one? Great shot btw Greg! - You must be stoked with the brute photon capturing capacity of that 17" beast!

Cooled CCDs are cleaner than DSLRs usually as well as each shot uses all the pixels and each count. As opposed to a DSLR where 4 pixels are required to get one colour pixel so there is a loss there. Most DSLRs QE is more like 30% with a few that are around 50% (D800, D4, a few Canon 1D cameras). DSLRs do well but it takes a lot of shorter subs stacked. That seems the best approach.

Quote:

Originally Posted by David Fitz-Henr

An awesome shot Greg, loads of details there

I think I agree with Mike; shrinking to 75% size reduces the noise but still shows all the detail.

Thanks David.

I am adding more data next new moon and I'll post it at that size as well.

Cheers,

Greg.

PRejto (Peter) · #37 24-12-2013, 11:45 AM

Hi Greg,

Fantastic!! One of the best 1365s I've yet to see. I'm anxious to try out my Trius on this galaxy to compare to my result a year ago with my G2-8300, but I'm still trying to get to the bottom of my mount issues. What a royal pain, but I digress.

Peter

gregbradley · #38 24-12-2013, 05:32 PM

Quote:

Originally Posted by PRejto

Hi Greg,

Fantastic!! One of the best 1365s I've yet to see. I'm anxious to try out my Trius on this galaxy to compare to my result a year ago with my G2-8300, but I'm still trying to get to the bottom of my mount issues. What a royal pain, but I digress.

Peter

Thanks Peter. I intend to add to it if the weather clears up.
It did turn out better than I expected so its worth the effort to do more.

Greg.

SkyViking (Rolf) · #39 24-12-2013, 06:47 PM

Wow that is a nice looking NGC1365 for sure Greg. You've got plenty of detail at that image scale, impressive. The noise will disappear with more subs, so just keep going

With more data it'll be one of your best images I reckon.

gregbradley · #40 24-12-2013, 08:35 PM

Quote:

Originally Posted by SkyViking

Wow that is a nice looking NGC1365 for sure Greg. You've got plenty of detail at that image scale, impressive. The noise will disappear with more subs, so just keep going

With more data it'll be one of your best images I reckon.

Thanks Rolf. Yes I think it came out very well and I want to make it the best it can be with this setup.

Greg.