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Forums Lobby GET TO KNOW YOUR CAMERA & MASTER IT Nikon D7100, D7000 (Public) topic #27128
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Subject: "RE: Simple Mega Pixel question" Previous topic | Next topic
dslater Silver Member Charter MemberMon 06-May-13 07:56 PM
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#3. "RE: Simple Mega Pixel question"
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Hollis, US
          

Each pixel in your raw image is represented by a 2 byte integer. At 4928x3264 pixels, this gives
4928x3264x2 = 32169984 = 30.6 MB where a megabyte is actually (1024*1024=1,048,576) bytes. The D7000 raw format is a compressed format, so these 30.6 megabytes of data are compressed down to about 23-24 megabytes on your card.

To further confuse the issue, A megapixel is 1,000,000 pixels. The reason a megabyte is 1024*1024=1,048,576 is due to the way software developers think about memory and numbers and the fact that this is an even power of 2.
Camera manufacturers like to use 1,000,000 pixels to mean a megapixel because it lets them put slightly larger numbers in their marketing literature. You D7000 is marketed as a 16.2 megapixel camera. If it were calculated the same way as megabytes are, it would only be 15.3 megapixels.
Note: in recent years, hard drive manufacturers have taken to using 1,000,000 bytes as a megabyte for the same marketing reasons

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A general, generic topicSimple Mega Pixel question [View all] , blume357 , Mon 06-May-13 03:10 PM
 
Subject Author Message Date ID
Reply message RE: Simple Mega Pixel question
aolander Silver Member
06th May 2013
1
Reply message RE: Simple Mega Pixel question
kodiak photo Silver Member
06th May 2013
2
Reply message RE: Simple Mega Pixel question
dslater Silver Member
06th May 2013
3
Reply message RE: Simple Mega Pixel question
blume357
07th May 2013
4
     Reply message RE: Simple Mega Pixel question
chesterdawg Silver Member
07th May 2013
5
          Reply message RE: Simple Mega Pixel question
jagabom Silver Member
08th May 2013
6
Reply message RE: Simple Mega Pixel question
PAStime Silver Member
09th May 2013
7
Reply message RE: Simple Mega Pixel question
elec164 Silver Member
09th May 2013
8
     Reply message RE: Simple Mega Pixel question
PAStime Silver Member
10th May 2013
9
          Reply message RE: Simple Mega Pixel question
elec164 Silver Member
10th May 2013
10
               Reply message RE: Simple Mega Pixel question
PAStime Silver Member
11th May 2013
11

Forums Lobby GET TO KNOW YOUR CAMERA & MASTER IT Nikon D7100, D7000 (Public) topic #27128 Previous topic | Next topic


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