- Astro-Devices (of Ukraine) Parallelogram Standard II Pro
- Review: Explore Scientific 16”, Europe edition, late 2016
- VITE 2X Barlow Lens Review
- Sky Commander Review
- Wireless Control of Canon EOS DSLRs with DSLR Controller and TP-Link MR3040 W...
- Review of the 18” f/5 Otte binodobson
- Wireless Telescope Control for Celestron (and Compatible) Scopes
- A Review of Teeter STS18
- MesuMount 200 Review
- First Light with the Prototype 8x42 Space WalkerTM 3D Binoculars
- INTERSTELLARUM DEEP-SKY ATLAS (FIELD EDITION) REVIEW
- THE BAADER BBHS-SITALL SILVER DIAGONAL
- Explore Scientific AR 102
- Review: davejlec's Paralellogram Mount
- Annals of the Deep Sky, Volumes One and Two
CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.
Sep 01 2009 07:15 AM | Chris Lord in Optical Theory
The Fraunhofer diffraction pattern produced by any particular aperture or obstruction placed across that aperture can be modelled using a Fourier Transformation
Mar 12 2005 11:44 AM | admin in Optical Theory
Neither mirror nor prism are better. If you notice, every manufacturer of quality scopes with fast focal ratios uses mirror diagonals. Every manufacturer that sells quality scopes with long focal ratios sells prism diagonals. It’s not an accident. You get the diagonal that matches the scope.