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DPChallenge Forums >> Tips, Tricks, and Q&A >> Help a "newbie" out? Film speed? ISO?
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Showing posts 1 - 12 of 12, (reverse)
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11/12/2003 01:47:38 PM · #1
This is my first attempt at submitting a photo for a challenge. I've been "lurking" around a bit just looking and learning, and I really wanted to give it a try this time. The only problem is, how the heck do I find my film speed?? I found the info for the rest... I have a list that looks like this:
Width
Height
Horizontal Resolution
Vertical Resolution
Bit Depth
Frame Count
Equipment Make
Camera Model
Color Representation
Shutter Speed
Lens Aperture
Subject Distance
Flash Mode
Focal Length
F-Number
Exposure Time
Metering Mode
Exposure Compensation
Date Picture Taken
****
Where in all of that is my film speed?? It's a digital camera, Canon Powershot S100, if that helps.

Sorry to be so stupid, believe me, I'm embarassed!
-Alecia
11/12/2003 01:51:40 PM · #2
The film speed has to be calculated:

ISO = [(Width/Height)^Bit Depth / Exposure Time] * Subject Distance

Uhm. I mean, I don't see it. Are you sure there aren't more fields? I am confused as to why you have lens aperature and F-Number listed seperately though. Aren't they the same thing?
11/12/2003 01:53:17 PM · #3
Huh?
11/12/2003 01:53:46 PM · #4
I have no idea!
Those are the only fields I see...
I sure hope you're kidding, because if not, that little formula is bringing back awful memories of math classes long past - and forgotten!
11/12/2003 01:55:27 PM · #5
Yes I was.

What program are you using to get the EXIF data? You may want to try a different one.
11/12/2003 01:57:03 PM · #6
Err... I was using... right click on my file, go to properties. Any better (and easy) recommendations?
11/12/2003 02:10:22 PM · #7
Hmmm. All I get using the right click method is very basic image data (none of which have to do with the camera or photo details). May have to do with the system being used (I have Windows 2000). Anyway, try looking at it using ACDsee or some other photo viewing software.

Either way, I am pretty sure the problem lies with the viewer used, not the photo itseld.
11/12/2003 02:12:39 PM · #8
Ally, I would use the software that came with the camera. Does anyone know if PS or other photo editing software extracts EXIF data??
11/12/2003 02:14:01 PM · #9
Try ACDSee or Exifer. This last one is more perfect. ACDSee always says stupid things, for example I had 6 for aperture. Exifer says at the same time that it was f/8 which sounds much more reallistic.
11/12/2003 02:20:20 PM · #10
Try this one. I have uploaded Exifer, that's specially an exif viewer program. Use it well.

//chacky.onlinebudapest.hu/upload/exifersetup.exe
11/12/2003 02:33:09 PM · #11
If you're speaking of the "elph" the iso is listed as 100 . i found info @ www.digital-camerastore.com under reviews.
11/12/2003 02:38:23 PM · #12
Canon also lists iso @ 100 in specs on their home page .
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