OK, time to put my hand up (1 Viewer)

For about a couple of years now I've been using a Nikon D100. What I STILL can't understand is how a 6 Megapixel camera can produce an image of 34 odd megabytes in TIFF (image shot on RAW).

Please can someone enlighten me, preferably in words of 1 syllable, how this happens. Also, if a 6 Megapixel camera can produce A 34 megabyte image, will, say, an 8 Megapixel camera be capable of producing a 45 Megabyte TIFF, or a 12 Megapixel camera result in a 68 Megabyte file? Is there some logical conversion factor which can be used to 'predict' this?

I know, I KNOW I should understand but ............

Please be gentle with me!!!


Kevin

I think you get three lots of info from each pixel - RGB - via the camera's processing which trebles the file size (approx - not sure why it's not quite 18Mb) and then this is doubled if you're converting your RAW files to 16 Bit TIFFS (my Canon 20D gives approx 46Mb 16 Bit files)

Of course, I could be wrong, but I think that's about what it is!

Hi Kevin

A Tiff file 3072 x 2048 (6Mega pixel) x 3 ( for each RGB colour) = 18Mbytes

The above assumes 8 bits is used for each RGB colour.

If 16 Bits are used then you have 36 Mbytes.

8 Bits gives you 256 levels.

16 Bits gives you 65536 levels.

Robert

"Great minds think alike" springs to mind!

Thanks all for putting me straight so painlessly!!

Kevin

Adey Baker said:

"Great minds think alike" springs to mind!

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