akiralx Posted July 10, 2009 Share #1 Posted July 10, 2009 Advertisement (gone after registration) Apologies if this is totally normal, but unusually for me I was shooting jpg last night, and the file counter said 999 (no idea what the real total was, of course). I was using a 4Gb card. Changing ISO from 160 to 1250 I noticed that the available shots had reduced to 752 (I think). And ISO to 2500 reduced it even more. I had no idea that amending ISO could change the shots available. I suppose that noise has to be stored somewhere... Link to post Share on other sites More sharing options...
Advertisement Posted July 10, 2009 Posted July 10, 2009 Hi akiralx, Take a look here Changing ISO affecting file size?. I'm sure you'll find what you were looking for!
stunsworth Posted July 10, 2009 Share #2 Posted July 10, 2009 The number of shots remaining when you are shooting Jpeg is just a guess on the part of the camera. Each Jpeg will have a different size as each file will be able to be compressed to a different degree. If you are shooting high ISOs the files are likely to be noisier than is shooting at a low ISO and therefore won't be able to be compessed to the same degree as an image with less noise. Link to post Share on other sites More sharing options...
Shootist Posted July 10, 2009 Share #3 Posted July 10, 2009 Apologies if this is totally normal, but unusually for me I was shooting jpg last night, and the file counter said 999 (no idea what the real total was, of course). I was using a 4Gb card. Changing ISO from 160 to 1250 I noticed that the available shots had reduced to 752 (I think). And ISO to 2500 reduced it even more. I had no idea that amending ISO could change the shots available. I suppose that noise has to be stored somewhere... Shoot DNG then you know how many a card can hold. Link to post Share on other sites More sharing options...
jaapv Posted July 10, 2009 Share #4 Posted July 10, 2009 That is quite possible. The JPG compression is variable by image content and it may well be that higher ISO shots compress to larger files because of the noise content. Link to post Share on other sites More sharing options...
akiralx Posted July 10, 2009 Author Share #5 Posted July 10, 2009 Shoot DNG then you know how many a card can hold. I do 99% of the time, but had a new 28 Elmarit mounted without UV/IR so thought I would try b/w jpg for a day. Link to post Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.