Another Astrofest Rho Ophiuchi

[Garbz (Chris)]

Well dataloss hits everyone.

Repost of my shot of Rho Ophiuchi, see if it stays up for more than an hour or two this time.

Few hours with a D800 and a 200mm lens.

[Garbz (Chris)]

And since I was halfway through replying to this thread when the dataloss happened:

Originally Posted by prokyon

Very nice, I love that area and you captured it very well. Which 200 lens did you use?

Nikkor AF 80-200mm f/2.8D, ancient one.

Originally Posted by peter_4059

That's a great image Chris. You must be happy with that.

Stoked. I get the feeling my Corona Australis shot will be better from the camera than the telescope too. The widefield stuff is quite fun.

Originally Posted by RickS

Looks great, Chris! I haven't been game to leave my D800E outside by itself yet

I don't find much point in deconvolution unless you have a reasonably long focal length and small image scale. If you're significantly oversampled there's not much it can do for you. At 2760mm and 0.67 arcsc/pixel it is quite handy

I left mine outside during a storm. I think it'll survive a little cold weather :-)
The only reason I went for any kind of sharpening was I accidentally shot at f/2.8 the original was actually quite soft. Normally I just reach for Unsharp Mask because I fail at deconvolution, but I may have been looking over your shoulder when you did it last week and may have picked up a trick or two.

[Elio]

A beautiful image of a spectacular area!

[RickS (Rick)]

Originally Posted by Garbz

I left mine outside during a storm. I think it'll survive a little cold weather :-)
The only reason I went for any kind of sharpening was I accidentally shot at f/2.8 the original was actually quite soft. Normally I just reach for Unsharp Mask because I fail at deconvolution, but I may have been looking over your shoulder when you did it last week and may have picked up a trick or two.

I have a D700 that has been at -30C shooting the Aurora Borealis in Norway so it gets the outside duties at present

I'm glad if I was able to help. Deconvolution is like a free lunch

[Garbz (Chris)]

Originally Posted by RickS

I have a D700 that has been at -30C shooting the Aurora Borealis in Norway so it gets the outside duties at present

I'm glad if I was able to help. Deconvolution is like a free lunch

My D200 failed at -55C in Canada. It was like watching a slow motion train-wreak. First the camera got slow focusing, then the focusing system failed, then it became stiff to zoom, then the mirror got audibly slower to move, the LCD stopped refreshing (the black / white flashes changed to smooth shades of changing grey), and finally I pushed the shutter and didn't hear the mirror come down again. The camera could only say ERR. Came good after a nice thawing in the car though :-). It was hard keeping batteries warm so they keep working.

Also my experience with deconv thus far is that if there's any noise on the background of the image it turns the noise profile to complete garbage. I'm sure I've been doing something wrong

[RickS (Rick)]

Originally Posted by Garbz

Also my experience with deconv thus far is that if there's any noise on the background of the image it turns the noise profile to complete garbage. I'm sure I've been doing something wrong

I use a mask to protect low signal areas. Just grab a copy of the Luminance (or the image itself if it's grayscale) and stretch it with the blacks clipped a bit.