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How many megapixels are my pics?

alex bartonek , Aug 11, 2006; 02:59 p.m.

just a general question about this.. when I take pics w/my D70S and use the highest picture mode without RAW are my pictures 6mp pics (assuming 3000x2000)?

What about the D80? Since it is a 10mp camera in theory 3200x2000 (or whatever size its biggest is) those pics come out as 10mp, correct?

Responses


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David H. Hartman , Aug 11, 2006; 03:40 p.m.

Alex,

You can check the file size, the space the image takes on your computer, with your computer’s operating system. My guess is you don’t know how to use it well. Many programs like Nikon View and IrfanView can give you the image size which will be a little smaller. Forgive me if I’m wrong but it sounds like you need to do some serious studying to better use your camera and computer. This is such a simple question to answer with just a few clicks of your mouse. The answer is on the computer you set this message with.

Best,

Dave Hartman.

PS: I’m not a D70 owner so I can’t check my files to advise.

Roberto Totaro , Aug 11, 2006; 03:45 p.m.

3872x2592

Next time try using Google.

Roberto Totaro , Aug 11, 2006; 03:48 p.m.

I didn't understand you OWN a D80... Well. Then I agree with Dave.

alex bartonek , Aug 11, 2006; 03:52 p.m.

David,

No offense, but I have forgotten more about computers/programming then you will know in your lifetime. Forgive me if I am wrong.

I am not asking about filesize or imagesize. I am asking if the highest resolution image my camera takes, being 3000x2000(or so) would that be the 6 megapixel image? Simple question. More then likey it is yes but I figured I'd ask.

Please re-read my post to help you better understand my question.

Thanks Alex

Brian Y , Aug 11, 2006; 03:54 p.m.

Are you talking about file size or image dimensions? Assuming you mean image dimensions, yes.. 3000x2000 = 6,000,000 pixels = 6 mega (million) pixels.

Knowing that SLRs take pictures in the 2:3 aspect ratio and knowing the D200 is 10mp: 2x * 3x = 10,000,000. So 6x^2 = 10,000,000. So x=1291. So a D200's pictures are roughly 2582*3873.

alex bartonek , Aug 11, 2006; 03:55 p.m.

Thank you Brian. Thats what I figured.

Robert Meier , Aug 11, 2006; 03:57 p.m.

Alex, You're question is a very good one, and one that I have puzzled over for a long time. My D70 gives images, made on the best JPEG setting, that are 3008 x 2000 pixels; however, the file size for them is NOT 6 megabites, as I woud expect them to be. The file size varies from about 2.20 megabites to 2.85 megabites.

Brandon Hamilton , Aug 11, 2006; 04:01 p.m.

its "bytes", and there is no direct coorilation between image dimensions in pixles (megapixles) and the file size.

Rainer T , Aug 11, 2006; 04:04 p.m.

Robert ---"the file size for them is NOT 6 megabites, as I woud expect them to be"

A quite common mistake ... the assumtion that a pixel in the image would equal a byte in the file is wrong. (So is everything that derives from this assumtion).

Jpg does a (lossy) image compression ... it doesn't reduce its dimensions, but it does eliminate content and thereby, can reduce the size of the resulting file quite a bit.

Rainer


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