The reason I made the exposures all 30 seconds was based on the following logic....
Object rains down say 900 photons in 30 seconds...and to simplify the argument, evenly spread in R, G and B
Multi-spectral camera gets all 900 photons shining on the sensor.
Mono Camera with R G or B filter in front gets only 300 photons. To get an equivalent "full spectrum dose" three exposures need to be made to get the equivalent 900 photons to the sensor.
Also I could only trip the 5D for a maximum of 30 seconds using a USB cable, and didn't feel like guiding any of the exposures
Quote:
Originally Posted by h0ughy
Curiously the rgb the st11 took were 30 seconds each, so thats 90 seconds, yet you only took a 30second shot with the dslr? my maths was never my strong point  |