Here we compare various techniques or hardware.
Calculations - Optical Path and image scale calculations
Astrophotography Light Pollution Filters Slam-Down
Broad-Band Imaging - A comparison of some light pollution filters I have for broad-band targets.
Narrow-Band Imaging - A comparison of some light pollution filters I have for AstroPhotography for narrow-band targets.
Optical Train Analysis - Analysis of optical Train in various configurations.
Mount Analysis - Analysis of Mounts I have owned using PHD2 software