Originally posted by teamplayer A related question - I find that on a holiday where I take at least 250 snaps, coming back and uploading those is a serious drain on my computer's memory. For general holiday snaps, with no plans to print or blow up the shots, what quality should I be using? How much does the photo quality suffer as you go down in stars? I can't find any guide which provides me with any context as regards those stars - it's a reverse Spinal Tap (amp up to 11) situation - what is * as compared to *** etc.? Can anyone point me to an explanation of this?
There are two schools here. One school will never shoot at anything except full resolution, in case they might accidentally take the shot of a lifetime to print big and hang on the wall. I view it as a kind of angst. As you can tell, I belong to the other school. My school realizes that we will seldom print, and then only in A4 or A3 size, for those prints you can make do with the 6mp setting and still have room to crop a bit.
As for the compression level (the stars). Try this: take a RAW shot of a scene with lots of highfrequency detail, like wires, trees or such. Then use the in-camera development to develop 1, 2, and 3 star jpegs of that same raw shot. Finally compare the jpegs to each other using the in-camera comparison tool. You can zoom and pan two versions in sync and pixel peep all you want. The compression artifacts are clearly visible around hard edges.
My personal conclusions from this exercise is: 2* is almost as good as 3*, 1* is a great deal worse than 2*. But try it yourself.
So my normal shooting is 6mp 3*, unless I expect heavy cropping (eg. my lens is too short), then I go to 10mp 2*, which yields same file sizes as 6mp 3*. I'm a casual family shooter, not an artist. So I'm pretty pragmatic about this topic.
Here's one final argument for reduced resolution: To properly benefit from the full sensor resolution, the rest of the image capture system must be of the same standard. That means tripod, perfect focus, optimum aperture, sufficient shutter speed, top glass, no subject motion blur etc. Anytime you skip some of these points, you have already lost half the resolution and might as well just record in reduced pixel density, like 6mp.
You might also delete the failed and subpar shots early and save space that way.
Regards,
--Anders.