Jump to content

740427863_Terminatorchallenge.jpg.2f4cb93182b2ce715fac5aa75b0503c8.jpg

Big fat Pliades


Uranium235
 Share

Recommended Posts

Hiya,

Heres one of the targets I was working on last night, I decided to re-visit and old friend... M45. I was surprised I got so much for so little given the amount of moonlight about, some big phat diffaction spikes going on there :)

It was the first time i'd ised the newt for a while and I'd forgotten how long the damn thing takes to cool down properly - must have been 40min before i could achieve correct focus. Mind you, taking it from a warm house to a freezing garden would be bound to give serious tube currents for a while.

M45: The Pliades

6x360s, 5x600s

150P, 1000d, CCD CLS filter, 50mm finderguider

Thanks for looking!

attachment.php?attachmentid=44800&stc=1&d=1287663392

post-18171-133877494682_thumb.jpg

Link to comment
Share on other sites

That is a really nice picture, and it reminds me of the pictures i saw in astronomy books. For the record i think the diffraction spikes just add to the wonder of what must be one of many peoples favourite star clusters. So amazing what you can do with equipment today.

Link to comment
Share on other sites

Both the original and James' reworks are stunning and encouraging (I never thought to use longer exposures on M45 as it's such a bright object.

Do you mind me asking what ISO setting you used on your 1000D? How many darks and flats?

Link to comment
Share on other sites

Do you mind me asking what ISO setting you used on your 1000D? How many darks and flats?

No problem m8, I used:

ISO800

A stock set of 10x360s and 10x600s darks (taken in the fridge, so it matched last nights temp well)

30 bias frames

15 flat frames (from the laptop screen)

Thanks for having a poke with the picture James - loads more detail to be had, I did think about stretching it that far but thats where the moonlight starts to become bit noticeable. I think i could improve it with another hour of 10min subs (if we get clear sky any time soon) and some proper flats. :)

Link to comment
Share on other sites

A very nice image with plenty of signal caught. It would be worth backing off on the black point as you have clipped the fainter stuff and also resist pushing the blue channel too much. With the colour balance right you should end up with some golden coloured stars running through the cluster :)

Regards

Kevin

Link to comment
Share on other sites

Here's a slight re-edit from James's image

Nadeem.

Cor.. thats a good one! Seems I got a lot more than I first thought - thanks for that one Nadeem! :)

Hi Kevin, I havent really touched the channels on this one (yet), it was just a straight calib & stack in maxim. So if I go back, calibrate the frames again, but when i go to "convert colour" - will a 20% reduction in the blue channel scaling do the trick?

Its a case of "suck it and see" I guess :(

Will report back if I get something worthy of posting, cheers!

Link to comment
Share on other sites

The only software I use after maxim is paint shop pro (yeah, i know), but its all ive got :) There is a histogram function I often use, as well as for some saturation, sharpening and noise removal tools. The only problem is that it only works on 16bit TIFF images that need to be pre-stretched before it will accept them as a valid file.

I did give it another go last night and managed to get some other colours coming through, but im not happy with it. Im nowhere near Nadeems version yet! If its clear this weekend I will try to add more data.

Link to comment
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
 Share

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.