I DONT GET IT

dinorock

dinorock

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Mike
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i have a nikon D300 which has a 12.3mp sensor, so how come my files are 18.8mb in size? or are pixel size and megabite not the same :shrug:
 
dinorock said:
i have a nikon D300 which has a 12.3mp sensor, so how come my files are 18.8mb in size? or are pixel size and megabite not the same :shrug:
Click to expand...

MB and MP are two different things.
Although I see where your coming from.

18.8 MB file sounds about right to me.
If you lowered the JPEG quality that file size would get smaller.
 
andy_fozzy said:
MB and MP are two different things.
Although I see where your coming from.

18.8 MB file sounds about right to me.
If you lowered the JPEG quality that file size would get smaller.
Click to expand...

cheers andy i thoght my max file size would be 12.3mb:bonk: no wonder i filled up my computer hard drive in just 8 months :eek:
 
dinorock said:
cheers andy i thoght my max file size would be 12.3mb:bonk: no wonder i filled up my computer memory in just 8 months:eek:
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:D

No worries mate.
Wait until you start shooting raw then. They get even bigger :eek:
 
andy_fozzy said:
:D

No worries mate.
Wait until you start shooting raw then. They get even bigger :eek:
Click to expand...

already shoot in raw and i know they get bigger when you edit them as well just got a bit confused :thinking: :lol::lol: time for an external hard drive methinks
 
They sound like the RAW sizes to me.

My D90 produces RAW around 9 - 10 MB and JPEGs around 3-4 MB. All at largest files size and best quality.
 
Chaz Photos said:
Pixels are not file size you will find the file size will change with each image if you have a plain image with not much rang of colours it will be smaller then a very busy image with lots of detail and colour.
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cheers chas yeah ive noticed that they change size depending on the subject etc, just didnt expect them to be bigger than my pixel count . only noticed it really since upgrading from a d50 :thumbs:
 
Get an external drive, but you may want to consider getting two, one as a backup, as they DO die.Storage isn't expensive (compared to a couple of years ago in particular...), and backup is something that too many people think of after the event!
 
andy_fozzy said:
Wait until you start shooting raw then. They get even bigger :eek:
Click to expand...

Try scanning in a 6x6 slide at 3200dpi... photos end up being around 200MB each... or 300-400MB each including saving with layers after processing :thumbs:
 
ekimeno said:
Try scanning in a 6x6 slide at 3200dpi... photos end up being around 200MB each... or 300-400MB each including saving with layers after processing :thumbs:
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think i,ll stick to raw 12.3 mp for now cheers :nono:
 
Saving in RAW is nothing added nothing taken away, the files are quite large, but storage now days is as cheap as chips. And if like me your still getting to grips with PS, you can always go back to the original data and try again, and again, and again
 
dinorock said:
cheers chas yeah ive noticed that they change size depending on the subject etc, just didnt expect them to be bigger than my pixel count
Click to expand...

Each pixel needs more than 1 Byte to describe it. If you're using jpeg then it needs 3 bytes (1 each for red, green and blue) for each pixel. So a 12 MP image would be 48 MB. But that information can be compressed, so you get a smaller file.

If you use raw then it requires even more bytes to describe each pixel. And the compression isn't as efficient.
 
dinorock said:
i have a nikon D300 which has a 12.3mp sensor, so how come my files are 18.8mb in size? or are pixel size and megabite not the same :shrug:
Click to expand...

Sounds about right - a pixel isn't 8 bits (1 byte) but upto 14-bits depending on settings used. My guess is you are running on 12-bit with lossless compression.
 
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