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Old 24th of March 2007 (Sat)   #1
sirsloop
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Default HDR - San Francisco at sunset

I was out in SF on business this past week... I didn't get any time to sight see or anything, but I did manage to snap a couple HDR stacks from my room on the 15th floor of the JW Marriot in San Francisco...

This is an HDR shot from 17 images...


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Last edited by sirsloop : 24th of March 2007 (Sat) at 16:18.
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Old 24th of March 2007 (Sat)   #2
macroshooter1970
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Default Re: HDR - San Francisco at sunset

wow 17 images. did you really need that many?
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Old 24th of March 2007 (Sat)   #3
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Default Re: HDR - San Francisco at sunset

lol... why not...

probably could have done it with 4 or 5
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Old 24th of March 2007 (Sat)   #4
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Default Re: HDR - San Francisco at sunset

I think that the massive number of images may have contributed to the softness visible in the buildings, especially those in the lower left hand side of the image.

It's a nice idea, but I'd say that ambition was detrimental here.
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Old 24th of March 2007 (Sat)   #5
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Default Re: HDR - San Francisco at sunset

Quote:
Originally Posted by folville View Post
I think that the massive number of images may have contributed to the softness visible in the buildings, especially those in the lower left hand side of the image.

It's a nice idea, but I'd say that ambition was detrimental here.
2nd that. Although maybe it helped add some motion to the sky...that many stacked hurt the buildings more.
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Old 24th of March 2007 (Sat)   #6
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Default Re: HDR - San Francisco at sunset

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Originally Posted by sirsloop View Post
lol... why not...

probably could have done it with 4 or 5

like the others, it hurt the image I think. 3-4 at the most should be more than enough.
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Old 25th of March 2007 (Sun)   #7
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Default Re: HDR - San Francisco at sunset

I actually went back and limited this to 5 shots and recreated.... results were no better or worse than before. In fact, I think having so many images helped with editing. The tonal curve and histogram was much wider... holding more info. FYI, all 17 shots were hand held so that explains a lot about softness. I also never added any sharpening during post processing..

a quick usm and its a bit different...

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Last edited by sirsloop : 25th of March 2007 (Sun) at 04:16.
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Old 25th of March 2007 (Sun)   #8
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Default Re: HDR - San Francisco at sunset

The second one is definitely better. Look at the air conditioning unit in the center, much crisper, sharper.

Nice sunrise.

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Old 25th of March 2007 (Sun)   #9
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Default Re: HDR - San Francisco at sunset

Now i think it's been oversharpened, so you have both the softness caused by slight differences in camera placement as well as the appearance of jpeg compression.

For this sort of shot you'll definitely need a tripod, even just a cheap one to keep your camera in place. Then you'll be golden.
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Old 25th of March 2007 (Sun)   #10
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Default Re: HDR - San Francisco at sunset

fyi... here's one exposure from the middle of the stack...

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Old 25th of March 2007 (Sun)   #11
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Default Re: HDR - San Francisco at sunset

How did you do it? You bracketed 17 shots with different settings and use PS2 HDR Merge feature? Did you use different TV or AV values?

The second one with 4-5 shots seemns to have some kind of ghosting around the edge of the building (or is it my laptop screen ).
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Old 25th of March 2007 (Sun)   #12
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Default Re: HDR - San Francisco at sunset

Yep... HDR Merge, then used the mode: 8bit feature to bring it back to a viewable jpeg.

Both full size images are from all 17 images... the cropped shot of the mountain range was just a single exposure.

These are all ISO 800, F11, 10mm and vary from something like 1/400 to 1/5th handheld out of a Rebel XTi and ef10-22
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Last edited by sirsloop : 25th of March 2007 (Sun) at 17:05.
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Old 26th of March 2007 (Mon)   #13
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Default Re: HDR - San Francisco at sunset

Obviously you can't go back and shoot these, but if you were to try the same type of thing again, it'd be suggested that you lower the iso rating and keep the shutter at a tolerably high level so that you can hand-hold without so much trouble (1/5th is really pushing it, even with a wide lens). Seeing them now, i'd say that you should definitely have opened the aperture just to give you more working room for other settings.
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Old 26th of March 2007 (Mon)   #14
Alec Trevelyan
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Default Re: HDR - San Francisco at sunset

2nd one is much better, though now jpeg compression is killing it
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