PieterVuylsteke
Well-known member
Fact: if a 14bit DSLR image is read in PixInsight its values go from 0 to 0.25, or from 0 to 16383.
Reference : https://pixinsight.com/forum/index.php?threads/re-scaling-bug-for-dslr-pure-raw.11131/
A good exposed flat of a DSLR has thus a value of 0.125 rf about 8000.
But, normally one says a flat should have 0.5. Which, of course, is unreachable with a 14bit DSLR.
Does the ImageCalibration take the fact that a good 14bit DSLR flat only has 0.125 as value into account when calibrating ?
In Adam Block's CMOS video's I see the formula :
(Light - Dark) / (Flat - DarkFlat). But if a Flat is only 0.125 it makes a huge difference with a flat of 0.5 ?
Reference : https://pixinsight.com/forum/index.php?threads/re-scaling-bug-for-dslr-pure-raw.11131/
A good exposed flat of a DSLR has thus a value of 0.125 rf about 8000.
But, normally one says a flat should have 0.5. Which, of course, is unreachable with a 14bit DSLR.
Does the ImageCalibration take the fact that a good 14bit DSLR flat only has 0.125 as value into account when calibrating ?
In Adam Block's CMOS video's I see the formula :
(Light - Dark) / (Flat - DarkFlat). But if a Flat is only 0.125 it makes a huge difference with a flat of 0.5 ?