RA drift might be flexure after all

Battery Pack for the Pentax 67

Flare Testing

Backyard Learning

Data from Cooled Camera

Stacked Peltier Devices

Followup on hot camera

Summer is Coming


What I'm Doing About Flare

Clear Skies Returning?

Ghost of Cassiopeia (IC 59 and IC 63) at Calstar 2013