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View Full Version : Canon 40D ISO Expansion ???

cmkultradome
Dec-15-2008, 07:24 AM
I recently purchased a Canon 40D. Before buying, I borrowed a friends and set the ISO to 3200 using the custom function setting. Now that I have my camera, I am unable to get the ISO to expand to 3200. I set the custom function setting (ISO Expansion - "ON"), but the camera will still only go to 1600. I am shooting in Manual mode, with a 70-200mm 2.8L. I was shooting at a gymnastic meet this weekend (no flash allowed). It was like a cave in the gym, in order to get even a remotely acceptable exposure, I couldn't shoot any faster than 1/90 (needless to say all of my pictures were taken during poses in the routines). Am I missing something?? Are there other settings I need to change? I know the 3200 ISO will give me a lot of noise, but I just wanted to play with it. Thanks for your help.

Stephanie
Scotto
Dec-15-2008, 07:40 AM
The camera doesn't actually show 3200 on the display.

Once you have enabled the custom function you will be able to select 'H' which is 3200ISO

I shot this last week using my 40D also set to 3200 ISO. I was amazed at how little noise was actually on the image

http://scottsharman.smugmug.com/photos/434736571_beirz-L.jpg
c-line
Dec-15-2008, 04:26 PM
You probably have Highlight tone priority on. With HTP on ISO settings are limited to 1600. You can tell if HTP is on if your ISO setting on looks like this 16oo instead of this 1600. Turn off HTP in CFn II 3.
cmkultradome
Dec-15-2008, 05:09 PM
You probably have Highlight tone priority on. With HTP on ISO settings are limited to 1600. You can tell if HTP is on if your ISO setting on looks like this 16oo instead of this 1600. Turn off HTP in CFn II 3.

Thank you so much!!! That was the case. It was driving me crazy.

Scotto - thanks for posting the picture. I'm anxious to see what the ISO 3200 can do, looks good.

Stephanie
Cuong
Dec-17-2008, 01:34 PM
Try to avoid underexposure to minimize unwanted noise. Well exposed images at 3200 are very usable as shown by Scotto's example.

Cuong
darkdragon
Dec-17-2008, 01:38 PM
You probably have Highlight tone priority on. With HTP on ISO settings are limited to 1600. You can tell if HTP is on if your ISO setting on looks like this 16oo instead of this 1600. Turn off HTP in CFn II 3.


Yeah, i did the same thing! I should have asked here as that would have saved me some time and frustration. :rofl