Pictures left not changing with ISO on Mark III

The estimate for the number of shots left doesn't change as I change the ISO (RAW or JPEG) on my Mark III but it does on another person's Mark III and it does on my XTi...

Ideas?

It doesn't on mine. CF or SDHC.

1.1.0? Maybe...what size cards and what card slot? Some quirk of styles?

Grrrr. Yeah, we both have 1.1.0, and we're both using CF. I have SD in there too, but the same happens with only CF in there. Styles wouldn't have anything to do with this...

I would hope styles wouldn't do it, but I've seen worse errors than that in firmware.

And well, full card, empty card, 2gb, 4gb, 8gb, CF and SDHC, RAW, various JPGs and folders, mine appears fairly confident that it knows exactly how many shots are left regardless of ISO.

Now you've really piqued my interest.

Good - maybe we can get to the bottom of this........

???

How drastic is the change in shots remaining? I just tried two different Sandisk 8GB Extreme IIIs and got 351 and 352 when empty. After 10 pictures it was down to 341 and 341. 10 more and it's 331 and 330. We know the shot count is based on a preset average (or something) anyway, so....I'm going to blindly guess that if the difference is only one or two pictures, it might be a quirk of that card in that camera. When you get a chance, try your card in his camera and see if they agree on what should be left, then try it ISO again. Same for his in yours.

Sort of that, I'll blame dust delete data until someone comes up with something more crackpot than I because I'm at a complete loss for the moment.

Shots remaining is an estimation. Different factors affect the number displayed.

Yes, I believe it is an estimate of shots left. A very good estimate I think. Depending on how many unique colors are in each shot the file size changes.

No, I understand it's only supposed to be an estimate. But that estimate varies by nearly 100 shots on my XTi when I have it set on ISO 100 vs. 1600. On my Mark III on 100 vs. 6400, there is no change in the estimate. There is a change on my friend's Mark III.

FWIW, I get about 467 shots remaining (IIRC) on my Mark III with an empty 8GB card. I usually end up getting more than 550 shots on an 8GB card when filled, but the estimate always starts around 460...

What jpg compression have you picked on the Mk III? And how about noise reduction and other menu choices?

As I see what you have explaned so far.......

If you shoot in Raw the camera will estimate how many "average type" shots you have left on the card. If you take say 10 shots of the sky it will be totally different that if you took say 10 shots of downtown New York that is because the amount of pixels used in the sky shots is minimal however a busy New York image would have lots of colours and contrasts so would use more pixels. The sky images could be half the size.

Then of course if you changed to shoot in low res Jpeg the images left would go up drastically.

I can only quote this on your 1D MkIII not your other camera's

HTH

Chris Gill

You'll get the most variation with jpeg because of the compression of "like" pixel values, but RAW files -- I'm looking at a folder with files varying from under 11 meg to over 16 meg from my 5D. And my 5D does recalculate the image count when I change the ISO, for whatever obscure reason...

Tony

tonylong wrote in post #4191705
And my 5D does recalculate the image count when I change the ISO, for whatever obscure reason...

That's not weird, that's what's supposed to happen. I just don't know how to get my Mark III to do that (purpose of this whole thread). My XTi does it....

sbressler wrote in post #4191741
That's not weird, that's what's supposed to happen. I just don't know how to get my Mark III to do that (purpose of this whole thread). My XTi does it....

Probably because noise control on the 1D III blows the other current cameras away...and noise is a huge factor in file size thus frame count remaining.

cdifoto wrote in post #4192558
Probably because noise control on the 1D III blows the other current cameras away...and noise is a huge factor in file size thus frame count remaining.

I agree in principal, but that doesn't tell us why it does change on another Mark III as stated in the OP.