Orpington Astronomical Society

Astronomy => Astrophotography => Topic started by: Kenny on Mar 09, 2015, 22:12:13

Title: Moon rise
Post by: Kenny on Mar 09, 2015, 22:12:13
SE London Moon rise compilation.
(https://farm8.staticflickr.com/7629/16767642491_31df662630_c.jpg) (https://flic.kr/p/rxGxWk)

Canon EOS 450D DSLR with Sigma DC 18-200mm lens set at 200m. Saturday 7th March.

First shot is 10 seconds at f/11, ISO-1600 to get the foreground. 2nd and 3rd shots are 4 seconds at f/11, ISO-200 to avoid over-exposing the Moon.

Despite knowing in advance I wanted to do this sequence and pick the best shot, the original goal being to get one 'perfect' single shot, I made a few planning mistakes and was a bit rushed when I got to it:

I'm determined to get a Moon rise shot well exposed with foreground and the Moon not burnt out. These were the best two.
(https://farm9.staticflickr.com/8618/16582428929_1ab388c457_c.jpg) (https://flic.kr/p/rgkhp4)
(https://farm8.staticflickr.com/7285/16561383147_5428a2273c_c.jpg) (https://flic.kr/p/retqdK)
But I think post processing has overly affected the Moon in the second one.

Exposure, histogram and curve adjusted and layered in Photoshop CS2.
Title: Re: Moon rise
Post by: Carole on Mar 09, 2015, 22:40:44
Some good shots there Kenny.

Carole
Title: Re: Moon rise
Post by: MarkS on Mar 10, 2015, 02:34:38
They look good Kenny.  There's no obvious blurring of the moon at that scale but I bet if you crop the image the blurring becomes obvious.  200mm x 10sec well exceeds the "Rule of 600" and so does 200mm x 4sec.  You could shorten the exposure time by choosing f/8 and ISO 400.

Mark
Title: Re: Moon rise
Post by: Kenny on Mar 10, 2015, 07:13:54
I agree which is why only the first shot is 10 seconds and the Moon wasn't supposed to be in that one. The other shots are 4 seconds but even that is too long. I chose f/11 so the foreground would be in focus but increasing the ISO would help.

And as we've discussed previously, rule of 600 isn't really an effective measure. It's too long. I'll add this to my list of defects and avoid zooming/cropping the image. ;-)