80=1600 ISO Shots with S5is

[jack55]

Here are some shots I took of my block with the Christmas lights on my house.
I shot the same spot/frame 35mm focal length in program mode @ 80, 100, 200, 400, 800, 1600 ISO @ 6mm focal length. Acceptable shots were at 80, 100 & 200. Unacceptable shots, (too grainy/noisy) were 400, 800, 1600.

ISO-80, f/2.7, max aperture 2.875, exposer time 1 sec.
http://1-4u-computer-graphics.com/80a.jpg

ISO-100, f/2.7, max aperture 2.875, exposer time 1 sec.
http://1-4u-computer-graphics.com/100a.jpg

ISO-200, f/2.7, max aperture 2.875, exposer time 1 sec.
http://1-4u-computer-graphics.com/200a.jpg

ISO-400, f/2.7, max aperture 2.875, exposer time 1 sec.
http://1-4u-computer-graphics.com/400a.jpg

ISO-800, f/2.7, max aperture 2.875, exposer time 1 sec.
http://1-4u-computer-graphics.com/800a.jpg

ISO-1600, f/2.7, max aperture 2.875, exposer time 1 sec.
http://1-4u-computer-graphics.com/1600a.jpg

Here are the difference in file sizes for each ISO
http://1-4u-computer-graphics.com/MyScreenHunter.jpg

[Jon]

Your point being? You'll always have noise in dark/underexposed areas, and it'll always be worse at high ISO values. And noise, like detail, makes file sizes bigger.

FWIW, the larger sensors of the EOS line are much better for high ISO work.

[mot]

good for ISO200 and under and acceptable for ISO400

[jack55]

Your point being?
Jon... why are you always so NEGATIVE?

I was just showing the differences in ISO with S5is for people to see.

[Woolburr]

Jon... why are you always so NEGATIVE?

I was just showing the differences in ISO with S5is for people to see.

All your "test" showed was how to make noisy images...to show how to make a relative exposure at different ISO values the correct sequence would have been:

ISO 100 1 second at f/2.7
ISO 200 1/2 second at f/2.7
ISO 400 1/4 second at f/2.7
ISO 800 1/8 second at f/2.7
ISO 1600 1/15 second at f/2.7

But since you are a professional photographer, you already knew that.;)

[Collin85]

Jack, I know you mean well but I'm also a little stumped on the precise purpose of these tests.

If it's to demonstrate high-ISO performance, then you need to alter either the shutter speed or aperture to maintain exposure parity. So a doubling of an ISO speed would also require stopping down the aperture by a full-stop or doubling the shutter speeds. Since you were already wide-open at f/2.7, that means doubling the shutter speeds for each iteration (as Dan pointed out). And plus you'd need a decent composition too.. a shot of near-darkness doesn't demonstrate much.

If it was to show how ISO affects exposure.. then that it a little bit pointless since we could of also opened the aperture up or slowed the shutter speeds for the same results. ;)

Regards,

[_aravena]

ISO is relative to the rest of the camera's setting plus location. ISO 1600 there sucks but not in every situation. While I've yet o see a decent 1600, I have shot 800 in my store and it came out perfectly fine.

[jack55]

Jack, I know you mean well but I'm also a little stumped on the precise purpose of these tests.
Regards,
All I was doing was showing the differences of the ISO at the same camera settings. ;)

One way to fix the higher ISO noise problem with these non dslr cameras is to use different settings like you said and or use PhotoShop program to improve them... here are two other programs to improve ISO shots:

http://fdrtools.com/documentation/fdrtools_2_x_e.php

http://www.northlight-images.co.uk/article_pages/noise_ninja_plugin.html

[jack55]

All your "test" showed was how to make noisy images...to show how to make a relative exposure at different ISO values the correct sequence would have been:

ISO 100 1 second at f/2.7
ISO 200 1/2 second at f/2.7
ISO 400 1/4 second at f/2.7
ISO 800 1/8 second at f/2.7
ISO 1600 1/15 second at f/2.7

But since you are a professional photographer, you already knew that.;)Thanks for your feedback.

I was just showing the noise at all ISO w/ same camera settings to show the differences.
I realize there are several way to remedy that through camera settings or software programs.
Here is the properties of all six shots:
http://1-4u-computer-graphics.com/ISOsettings.jpg