Image statistics, Min/Max values

[Rudi]

Is the Image statistics Min/Max values ADU values?
How does AstroArt calculate the values?
For my Canon 1000D (12-bit) Max values never reaches the expected 2^12-1=4095 but is always arround 3500 to 3600.

[Dunmunro]

Is the Image statistics Min/Max values ADU values?
How does AstroArt calculate the values?
For my Canon 1000D (12-bit) Max values never reaches the expected 2^12-1=4095 but is always arround 3500 to 3600.

What is the min and background values? IIRC, Canon adds an offset which then reduces the ADU range available for the signal.

[Rudi]

What is the min and background values? IIRC, Canon adds an offset which then reduces the ADU range available for the signal.

Code: Select all

Name  ...........  #3 ngc4631-480s-3_024.fit
Path  ...........  C:\Users\rbr\Dropbox\Main\astro\2019\0401\
Size  ...........  3906 x 2602
Telescope  ......  12 42.3  +32 25
Pixels  .........  10163412
Min  ............  3 @ 3016,149
Max  ............  3651 @ 1210,6
Background  .....  327
Average  ........  327.93809
Sum  ............  3332969910
Std.deviation  ..  45.949128

[Dunmunro]

what exposure time are you using?

Does the ADU reach 4096 during terrestrial photography?

This article may be of some use:

http://www.stark-labs.com/craig/article ... earity.pdf

[Rudi]

It’ a 480[s] exposure.
A loooong daytime exposure shows the same, saturated values around 3500-3600.
I feel like Canon has only sold me a 11 3/4 bit camera