Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

Uranium235

Askar ACL200 - First colour image (NGC7000)

Recommended Posts

Well, its been a couple of weeks before I was able to go out and grab some OIII for this one (always a challenge due to localised LP) - but its now in the bag and I've spent the morning processing it (still feeling pretty tired though.....lol).

So, the million dollar question - can this lens make a pretty photo?  Yeah, I think so :)

Had to crop a little bit out because of a medidian flip on the OIII, but I didnt lose that much. While I was there I also topped up the Ha luminance layer for a bit less noise in the outer regions.

One other note though... being as the lens body is almost entirely made of metal (and can hence get quite cold) - you do need to go out and adjust the focus after about 45 min from the session start... nothing unusual or different from any other telescope or lens really.

 

19x900 (Ha_L), 8x900 Ha_R, 8x900 OIII_G&B  - Modified cannistra biclour process

Askar ACL200, QSI6783, NEQ6

Thanks for looking! :)

 

50444829427_5bbf400f0f_o.jpg

 

Ha luminance layer:

Ha_L_proc_85.thumb.jpg.887dbdd37015bd2d187557e855e6ee04.jpg

  • Like 33

Share this post


Link to post
Share on other sites

Pretty photo indeed Rob,

nicely captured and processed,

I think the lens has performed admirably, I do not think you could ask for more.

well done

Paul

Edited by ultranova
  • Thanks 1

Share this post


Link to post
Share on other sites

Looks pretty darn good Rob, did a bit of pixel peeping and can't fault it.

Have you tried any RGB with it yet ?

Dave

  • Thanks 1

Share this post


Link to post
Share on other sites

Very nice Rob. Love the colours and the depth in the pic is superb.

  • Thanks 1

Share this post


Link to post
Share on other sites
3 hours ago, Davey-T said:

Looks pretty darn good Rob, did a bit of pixel peeping and can't fault it.

Have you tried any RGB with it yet ?

Dave

Havent tried RGB yet Dave, that will be my next box to tick being as M45 is now coming into view from my back garden (a bunch of very bright stars should be a good test).

  • Like 1

Share this post


Link to post
Share on other sites

Lovely image Rob - congrats.

  • Thanks 1

Share this post


Link to post
Share on other sites

Great image Rob.  Really excellent colour and detail there too.

  • Thanks 1

Share this post


Link to post
Share on other sites

Very nice, what aperture did you set the lens to? 

Edited by LooseFur
typo
  • Thanks 1

Share this post


Link to post
Share on other sites
17 hours ago, LooseFur said:

Very nice, what aperture did you set the lens to? 

This was wide open at f4, using the 2/3rds focusing technique (not focusing on a centrally placed star, but moving it out 2/3rds towards the edge of frame).

  • Like 1

Share this post


Link to post
Share on other sites

cool! I am struggling to get good stars across the image of my modded canon 6D at f/4. I can get the lower left corner good, but the top right suffers, and vice versa. Painful!

Share this post


Link to post
Share on other sites

Cor blimey, Rob, that doesn't look like a lens image! The stars are tiny.

I can safely say that I'm very impressed!

Olly

  • Like 1

Share this post


Link to post
Share on other sites
8 hours ago, ollypenrice said:

Cor blimey, Rob, that doesn't look like a lens image! The stars are tiny.

I can safely say that I'm very impressed!

Olly

Might have something to do with the Astrodons :D  and a bit of processing magic.

Share this post


Link to post
Share on other sites
On 13/10/2020 at 13:01, LooseFur said:

cool! I am struggling to get good stars across the image of my modded canon 6D at f/4. I can get the lower left corner good, but the top right suffers, and vice versa. Painful!

You have the same lens? Try 2/3rds, but moving the star towards the affected corner.

  • Like 1

Share this post


Link to post
Share on other sites
2 hours ago, Uranium235 said:

You have the same lens? Try 2/3rds, but moving the star towards the affected corner.

yes, same lens but I am on full frame so I am not sure how much of the lens area you are using with your camera ? Is it full frame?
Though I am very new to all this so I have a lot to learn! 
I opened a thread about this on CN actually (https://www.cloudynights.com/topic/734450-issue-with-asymmetry/). I can't seem to get both corners sharp (top right, bottom left)

Edited by LooseFur
added info

Share this post


Link to post
Share on other sites
2 hours ago, LooseFur said:

yes, same lens but I am on full frame so I am not sure how much of the lens area you are using with your camera ? Is it full frame?
Though I am very new to all this so I have a lot to learn! 
I opened a thread about this on CN actually (https://www.cloudynights.com/topic/734450-issue-with-asymmetry/). I can't seem to get both corners sharp (top right, bottom left)

Im using the KAF8300 sensor - its just very slightly smaller than APS-C

Share this post


Link to post
Share on other sites
14 hours ago, Uranium235 said:

Im using the KAF8300 sensor - its just very slightly smaller than APS-C

aaah ok - Yes, I am using full frame so you are not using the edges of the lens that I am...

Share this post


Link to post
Share on other sites
8 hours ago, LooseFur said:

aaah ok - Yes, I am using full frame so you are not using the edges of the lens that I am...

In my experience, there are very, very few lenses or telescopes that can cover a true full frame (35mm+) with pinpoint stars. And those that do, cost a lot more (thousands).

  • Like 1

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.