Orpington Astronomical Society

Astronomy => Astrophotography => Topic started by: Fay on Oct 12, 2010, 16:32:40

Title: Perseus Double Cluster and comet Hartley 071010
Post by: Fay on Oct 12, 2010, 16:32:40
This was taken on friday, so misty we could not see each other, but we all carried on imaging, as up was visible!

This was 24x300 WPZS66, o.85fr, Canon 350D

(http://farm5.static.flickr.com/4057/5075592966_df0bd1e9ca_b.jpg)
Title: Re: Perseus Double Cluster and comet Hartley 071010
Post by: Mac on Oct 12, 2010, 17:00:10
wow, that amazing how much the comet has moved in that time.

Loads of stars :o

are you going to do the comet stack as well?
Title: Re: Perseus Double Cluster and comet Hartley 071010
Post by: Fay on Oct 12, 2010, 17:01:38
Well, I do not have that on my version at the moment, not sure where it has gone as I have used it before, but not sure if I liked the result.

I will fish around & try it out.

The stars do space out as the image gets larger
Title: Re: Perseus Double Cluster and comet Hartley 071010
Post by: Tony G on Oct 12, 2010, 17:40:03
Great image Fay, well done.

Tony G
Title: Re: Perseus Double Cluster and comet Hartley 071010
Post by: Fay on Oct 12, 2010, 17:42:44
Thanks Tony
Title: Re: Perseus Double Cluster and comet Hartley 071010
Post by: mickw on Oct 12, 2010, 19:31:11
Great stuff Fay
The only one to see let alone image the comet
Title: Re: Perseus Double Cluster and comet Hartley 071010
Post by: MarkS on Oct 12, 2010, 21:14:25

Well done to get that comet Fay - conditions were not at all good that night.  Alongside the double cluster it looks really good.

A lot of the background noise would disappear if you use some darks (taken at the same temperature as that night).

Mark
Title: Re: Perseus Double Cluster and comet Hartley 071010
Post by: RobertM on Oct 12, 2010, 22:20:55
Great image Fay, I've been looking forward to seeing this one.  Could be my contact lenses but the stars look a tad green, otherwise it looks good to me.

Robert
Title: Re: Perseus Double Cluster and comet Hartley 071010
Post by: Fay on Oct 12, 2010, 23:03:52

Do you think this is better, not over processed

(http://farm5.static.flickr.com/4025/5076068883_9c7ab7ebc5_b.jpg)
Title: Re: Perseus Double Cluster and comet Hartley 071010
Post by: MarkS on Oct 13, 2010, 05:56:58
Fay,

It looks like the double cluster is burnt out :-(
But you can take some more frames of double cluster any day to fix that.

What the image needs is more range scaling (e.g. asinh or multiple application of curves) to tone down the stars whilst keeping the comet's glow bright.

Mark
Title: Re: Perseus Double Cluster and comet Hartley 071010
Post by: Fay on Oct 13, 2010, 08:30:20
Thanks Mark. I am not happy with either of these images, shame, but there you go
Title: Re: Perseus Double Cluster and comet Hartley 071010
Post by: RobertM on Oct 13, 2010, 08:33:39
The stars are less green now.  I'd rebalance the colours then try to bring out the comet with scaling as Mark has suggested, perhaps some DDP would help there?

Robert

Title: Re: Perseus Double Cluster and comet Hartley 071010
Post by: Daniel on Oct 13, 2010, 21:08:09
Fantastic capture Fay, must have a go at this one myself, you've framed it really nicely with the double cluster

:O)