Category: Optics

The universe as seen through lenses and Telescope

ZWO ASI camera and dew problems, how to fix it?

CMOS camera dew problems how to fix it.

How good is the Askar FRA300?

Askar FRA300 for astrophotography

Using a Sigma Art 40mm F1.4 for astrophotography

Sigma Art 40mm F1.4

Collimating an SCT: the C14 magic

seeing Airy disk despite turbulence