Greetings all. I've been studying the excellent youtube videos by SharpCap creator Robin Glover on optimum CMOS imaging settings. He provides a formula for the recommended sub-exposure length in seconds is as follows: = 10x(R squared/P) where R is the read noise in electrons (available from the instruction manual for the camera) and P is the light pollution rate in electrons per pixel per second. P can be calculated using a calculator provided by Robin at www.tools.sharpcap.co.uk . According to this formula, the recommended sub exposure time is very sensitive to the light pollution factor which is in turn very sensitive to the Quantum Efficiency of the camera. For instance for my location and set up @50% QE at F5 I get 90 seconds. @75% QE at F5 I get 60 seconds. Obviously a huge time savings if the higher number is more accurate. In the camera specifications it says that it has not yet been determined. This camera has been out for a while. Is there any updated information on the Quantum Efficiency of this sensor?
Thanks and clear, dark skies!
Allan
Big Music Creek Observatory
10" Meade LX600 ACF wedge/pier mount
Marion County, Arkansas
