In this video I will discuss the visual and interferometric tests of camera mirror telephoto lenses. Contents:
0:00 intro
1:16 Vivitar f=800mm F:8 mirror lens
4:58 Sigma f=600mm F:8 mirror telephoto
7:34 Soligor f=500mm F:8 mirror lens
8:26 Explaining interferometry in auto-collimation
12:09 Actual interferometry measurement setup
14:58 About Strehl Ratio
17:15 Strehl ratio and aberrations of Vivitar 800mm mirror lens
18:18 Comparison with results of Sigma 600mm mirror lens
20:17 Extro
EXTERNAL SOURCE LINKS:
DFTfringe software download:
github.com/githubdoe/DFTFring...
Dale Eason DFTfringe group: groups.io/g/Interferometry/to...
Other videos on DFTfringe software:
• DFTFringe quick start ...
• version6
/ @daleeason9687
• Making a Mirror with a...
User experiences with the Vivitar 800mm mirror telephoto lens:
www.bhphotovideo.com/c/produc...
www.amazon.com/Vivitar-800mm-...
Syntax-Brillian Bankrupcy and Sakar aquirement:
seekingalpha.com/article/6660...
www.cnet.com/tech/tech-indust...
www.optyczne.pl/1093-nowo%C5%...
www.sakar.com/
Original Vivitar 800mm Solid Catadioptric:
www.photo.net/forums/topic/50...
www.dpreview.com/news/3295932...
Vivitar rebranding:
mikeeckman.com/2016/12/vivita...
Star field Foto (by Felix Mittermeier)
www.pexels.com/photo/galaxy-s...
Bokeh bird in garden photo (by kenetik):
forum.mflenses.com/vivitar-ser...
Tommy Cooper photo: panorama.nl/artikel/174764/ko...
End music: "Floating" performed by the Early Birds (recorded in Eindhoven in 2000).
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