In my work I am dealing with *.CR2 raw images taken by a Canon DSLR in raw mode.
When I read about the format here, I was surprised to find that it has 4 TIFF IFDs which contain a) Original Size JPEG Image b) Thumbnail JPEG image c) Uncompressed RGB data d) Lossless JPEG image.

My impression until now was any camera captured RAW image file would have Raw Bayer Data i.e. R,Gr,B,Gb kind of bayer data, and some EXIF data about camera capture settings etc.

But after reading this CR2 specification I am slightly confused as to how can it have a RGB data or even surprisingly JPEG data. This seems to be the data after demosaicing(obtaining the missing R/G/B pixel data for the original sensor Bayer pattern). If thats the case I would not consider *.CR2 as "truly raw" data. It has done demosaicing before dumping the socalled raw file.

Am I missing something?

Does any other Camera Raw formats(e.g. Nikon - *.NEF, Kodac - *.kdc, Pentax - *.ptx/pef,...) have real raw bayer data without any processing done?


Question: Why does my 24VDC fan draw much less current than labeled?
Answer: The electrical motors have (as a rule) high efficiency. That is why the current consumption highly depends on the motor mechanical load. For example, if you try to stop the rotor, the current should increase at least twice. 

When the fan works it is differently loaded, depending on the airflow. On the next picture, you can see, that the efficiency is maximal when the airflow is limited by the pressure difference - i.e. when the fan have to make to work in order to move the air:



So, if you test the fan in idle mode it will consume less power.