The Out of Focus Spider

[leon]

Hi Guys,

Yes I know it is just a wee bit out of focus, and your sick to death of seeing this object, but I thought I would show the nice wide field of the area anyway. :whistle: so next time I can get it right. :rolleyes:

Next time I shouldn't have a couple of wines before I start imaging :lol:

Anyway it is a combined effort of 15 @ 5.00minutes each @400, with the Moddded 5D and the Tak, ICNR on, and flats applied. processed in Image plus.

Thanks for having a look

Leon :thumbsup:

[jase]

Leon, yes, these mainstream targets can get a little blasé, but there's always opportunities to frame it differently to provide a different perspective. The FOV is quite remarkable. As you indicate, a little soft due to focus and it would appear you've tried to compensate for this through sharpening as the stars are beginning to show a few dark rings around them.

Something I've done before with widefields, is perform a very light unsharp mask across the entire image in PS - make sure it is very light (in some cases barely perceivable - its always easy to over do it) - just to tighten up a few features and stars. Keep an eye on the stars and in particular the noise in the process. Sharpening the entire image can be flaunt with danger if you've got noise present in the dim area as it will emphasise it. Then duplicate the layer and run the unsharp mask filter again, with the same settings or slightly stronger - but mask the effect to give you control over where you want that extra punch of detail i.e. around the spider and other wisps of nebulosity. If you find this layer is having a profound/un-natural impact on the data, simply drop the layer opacity down to 20% or 30%.

Look forwarding to seeing more posts from, either you have posted much or I've been away for too long (more than likely the latter). Keep at it.:thumbsup:

[leon]

Thank You Jase for your constructive comments, you may have been away a bit from this site, but I too have not posted much of late, must get back into it soon.

Leon

[leon]

Hi Jase, I just had a play with this images and your suggestions certainly made a big difference, although it is still a little soft in the focus area it certainly sparked it up a bit, Thank You. ;)

Leon :thumbsup:

[jase]

No problems Leon. For widefield work it best to stay away from heavier forms of sharpening such a deconvolution. These algorithms work best when data is oversampled, i.e. the arcsec/pixel is low. Widefields typically have a higher arcsec/pixel combination. I'm not saying you can't do it, but from what I've experienced, it will yeild less than desireable results. Unsharp mask or High-pass filter can work its wonders - just use them sparingly.

[multiweb]

Beautiful widefield Leon :thumbsup: Never tired to see the Tarantula. Great target.

[Garyh]

Nice widefield Leon! other than soft focus it looks very good!
cheers

[leon]

Well, thank you Marc, and Gary,, I have to agree, the wide field is great, but i spent so much time on it last night. :rolleyes:

However in the end I stuffed up, I should have doubled checked my focus :whistle:

Leon :thumbsup:

Do not have....:drink: