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Old Apr 27, 2010, 8:09 PM   #1
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Default HS10 flash vs high ISO

I took the HS10 for its first outing to an indoor annual Spring Garden Show. It was in a Mall with the exhibits under balconies and skylights - varied lighting conditions (all poor) so each situation was different and not comparable to others - basically hurried grab shots, as the exhibits were very crowded. Not knowing what to expect, I used Program (P) mode and took both flash and nonflash exposures, some of which are paired below (flash on the left and existing light on the right). This camera has two automatic modes, the one I didn't use (and now know I should have as it is supposed to adapt to varying conditions better than this one). Evidently the P mode is biased towards high ISOs (at least in low ambient light), varying only one increment between exposures with and without flash, but varying shutter speeds while keeping f stops constant. Without pixel peeping, exposures at these higher ISOs are better than I would have expected. Though some of you might be interested in seeing these. All are OOC, only reduced and slight cropping for framing uniformity within pairs.

1. 1/60s f/4.0 ISO800 13.8mm / 1/70s f/4.0 ISO1600 13.8mm

Name:  flashcomp-1.jpg
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2. 1/250s f/5.0 ISO800 43.1mm / 1/100s f/5.0 ISO1600 43.1mm

Name:  flashcomp-2.jpg
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3. 1/250s f/5.0 ISO800 41.4mm / 1/52s f/5.0 ISO1600 41.4mm

Name:  flashcomp-3.jpg
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4. 1/210s f/4.5 ISO400 23.9mm / 1/210s f/4.5 ISO800 23.9mm

Name:  flashcomp-4.jpg
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Old Apr 27, 2010, 8:11 PM   #2
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Exhibits from a parade float under the rotunda skylight:

5. 1/75s f/4.0 ISO400 15.5mm / 1/75s f/4.0 ISO400 15.5mm (same, no mistake)

Name:  flashcomp-5.jpg
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6. 1/75s f/4.0 ISO400 14.9mm / 1/80s f/4.0 ISO800 14.9mm

Name:  flashcomp-6.jpg
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Size:  132.3 KB
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Old Apr 27, 2010, 8:41 PM   #3
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Penolta-

Thanks for the very good selection of photo samples.

Sarah Joyce
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Old Apr 28, 2010, 12:22 AM   #4
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Thank you for the test pics. Some of the high ISO ones look better than their flash counterparts.
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Old Apr 28, 2010, 1:44 AM   #5
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exactly!
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Old Apr 28, 2010, 3:02 AM   #6
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Thanks a lot penolta..
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Old Apr 28, 2010, 4:14 AM   #7
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Nice post penolta. I must warn you though. Once you start enjoying high iso images you may find it very difficult to use flash
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Old Apr 28, 2010, 7:54 AM   #8
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I'm just now starting to tinker with the high ISO. Some of your images with flash look a little flattened. The high ISO counterpart have more dimension. Thanks for taking the time to do this. Really helpful.
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Old Apr 28, 2010, 1:13 PM   #9
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Thanks, folks, for looking and commenting.

Some of the losses with flash in these closeups may result from not reducing the flash output, which can be done in the menus. However some can be recovered with a bit of postprocessing. Here is another group of flash images that have been touched up a bit; all but one did not have ambient exposures for comparison. Number 2 in both series is the same - I chose the flash exposure of that pair to use because it preserved more of the color (one would think it would have been otherwise). EXIF is attached to each.

http://forums.steves-digicams.com/cl...0-flowers.html

A few "telephoto closeups" are here (also with EXIF):

http://forums.steves-digicams.com/tr...ll-trains.html

One of my gripes about this camera is that no 35mm equivalent FLs are included in the EXIFs (as they are in DSLRs), although the camera is marked in 35mm FLs on the zoom ring and lens barrel (which is very helpful while shooting)! You have to multiply by a factor of 5.7 to recover that info after the fact from the EXIF (the APS-C factor is 1.5X, which tells you how much smaller this sensor is).
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Last edited by penolta; Apr 29, 2010 at 12:59 PM.
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Old Apr 28, 2010, 6:40 PM   #10
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It's nice to see a well laid out comparison which is helpful, easily understandable and informative.... good work.

There are also times when using high iso & flash is the best solution, so you can get a balanced light that has reduced shadow but still good shape and definition.
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