Discussion
I took a great deal of images recently, 30D on large/fine jpeg setting, and they seem to be growing in file size when I save as .jpg 12 in photoshop (the highest setting)
Is this normal? Does canon's fine setting have less data in it than photoshops highest setting?
I fear Ive somehow cocked things up. You're not allowed to reduce image file sizes by saving at a high compression then resave (at a higher file size) at a lower compression when submitting to stock agencies. For the obvious reason that the more data there the better.
and 
but mostly
Dobbo, if you even mention shooting raw again
Is this normal? Does canon's fine setting have less data in it than photoshops highest setting?
I fear Ive somehow cocked things up. You're not allowed to reduce image file sizes by saving at a high compression then resave (at a higher file size) at a lower compression when submitting to stock agencies. For the obvious reason that the more data there the better.
and but mostly Dobbo, if you even mention shooting raw again
UKBob said:
I took a great deal of images recently, 30D on large/fine jpeg setting, and they seem to be growing in file size when I save as .jpg 12 in photoshop (the highest setting)
Is this normal? Does canon's fine setting have less data in it than photoshops highest setting?
I fear Ive somehow cocked things up. You're not allowed to reduce image file sizes by saving at a high compression then resave (at a higher file size) at a lower compression when submitting to stock agencies. For the obvious reason that the more data there the better.
and but mostly
Dobbo, if you even mention shooting raw again
Is this normal? Does canon's fine setting have less data in it than photoshops highest setting?
I fear Ive somehow cocked things up. You're not allowed to reduce image file sizes by saving at a high compression then resave (at a higher file size) at a lower compression when submitting to stock agencies. For the obvious reason that the more data there the better.
and but mostly Dobbo, if you even mention shooting raw again
yes they go from around 3.5 up to 5. if you save from raw they come out about 4. like wise if you save a small file at 12 it increases it in size.
southpaw said:
I found this, photoshop setting 12 is a bigger file. I think about 8 for me gives the same file size. No idea why as some extra data doesn't appear magically
Lets hope you're right. I'll test it tomorrow. Nearly a full days work went into that shoot (shot over 2 days) chris.mapey said:
Just shoot in RAW & be a man 
Speak soon...
Chris
Wotcha mapey Speak soon...
Chris
Im afraid. Its too soon. Im just not ready
Gemm said:
Have you set the camera's parameter correctly? You should be able to save the JPEG in 1-10, where 10 is the best quality.
Hmm, looks like there is quite a few settings, but it boils down to 1) Fine (royal princess setting)
2) not quite so fine (gypsy cleaner setting)
coupled with the ability to shoot in different sizes, plus raw, or without raw. I'll do some tests in the morning.
poah said:
yes they go from around 3.5 up to 5. if you save from raw they come out about 4. like wise if you save a small file at 12 it increases it in size.
Megabytes? Mine were as low as 1.something megs, on an 8mp camera!dcw@pr said:
imo 12 is pointless for DSC pics, it is always overkill. I save at 11 for important stuff, but to be honest I can't tell the difference between 10 and 11. Even 9 is adequate 99% of the time
Stock agencies say images must be saved at PS 12, so I have to go with that. I went through some old images. Looked at their file size. Saved in PS elements at a file size which was equivelent to that file size
(ie, I saw that an image was 2.5 megs, and re-saved the image after cleaning it in PS at a setting which was also 2.5 megs) then I read that images below PS 12 wont be accepted, opened them again
resaved at PS12, and they were all declined. So however lossles the compression appears to be, the powers that be can spot it a mile off, every time.
UKBob said:
Hmm, looks like there is quite a few settings, but it boils down to
1) Fine (royal princess setting)
2) not quite so fine (gypsy cleaner setting)
coupled with the ability to shoot in different sizes, plus raw, or without raw. I'll do some tests in the morning.
1) Fine (royal princess setting)
2) not quite so fine (gypsy cleaner setting)
coupled with the ability to shoot in different sizes, plus raw, or without raw. I'll do some tests in the morning.
I mean other than image sizes (L, M, S), isn't there a separate JPEG Quality settings in the menu where you can set it between 1 and 10? (Maybe it's different in 30D....)
Edited by Gemm on Tuesday 20th June 23:02
Oakey said:
What's the big problem with shooting in RAW?
Have to agree with that.
Archive the RAW files to DVD then you have back-ups if you bugger up the JPEGS. Decent RAW conversion software will apply your in-camera JPEG settings anyway so the conversion process is hardly scary.
Another option is get some big CF cards and shoot RAW+Large Fine JPEG. Might be the best of both worlds
tog said:
UKBob said:
Megabytes? Mine were as low as 1.something megs, on an 8mp camera!
If that's straight from the camera at 1MB, then the camera is overcompressing them. My 8MP EOS1 usually gives jpgs around 5-7MB, depending on ISO and subject obviously.
Gassing Station | Photography & Video | Top of Page | What's New | My Stuff