Grösse *.afphoto???

[larsh]

Hi, was macht denn, bitte, die *.afphoto so gross, um 200 MB bei einer RAW von 50 MB?

Why the *.afphoto is so big? Thx, lars

[walt.farrell]

A RAW file typically uses between 10 and 14 bits per pixel. To keep things simple, let's say it uses 14 bits per pixel.

Suppose your image size is 3000 x 2000 pixels. That would mean that your RAW image would have 6,000,000 pixels, and would need 84,000,000 bits or 10,500,000 bytes (10MB) in the RAW format.

Now you develop it to an RGBA/16 format. Each pixel of the developed image needs 16 bits for the R, 16 bits for the G, 16 for the B, and 16 for the A (opacity). That's 64 bits per pixel in the developed format vs 14 bits per pixel RAW. And the developed format takes 6,000,000 x 64 = 384,000,000 bits, or 48,000,000 bytes (45.8 MB).

This makes the developed format a bit over 4 times bigger, just to hold the image data.

An .afphoto file has more than just the image data, even if you don't make any other adjustments after developing. For example, it includes a snapshot of the initial image, so you can always revert back to or examine the original image later in your processing.