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- A quick Review of the MIGHTY MAX 12V 100AH BATTERY
- Nexus II Review
- New Moon Telescopes 20”F/3.3 Review
- FIELD TEST OF THE BAADER MAXBRIGHT® II BINOVIEWER
- My Experience using SkyWatch for the Alphea All Sky Camera from Alcor Systems
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- GSO 8-inch TRUE CASSEGRAIN
- Celestron Regal 65ED M2
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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 | Guest 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.