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Ronchi on a refractor

Started by David Simons, 09/01/2007 03:25AM
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Posted 09/01/2007 03:25AM | Edited 09/02/2007 07:07PM Opening Post
David Simons
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Join Date: Aug 2001

Location: Santa Rosa CA, US

Posts: 255

Here is a Ronchi (100 lpi) picture of a Ukraine made 8" f10 refractor lense against a flat mirror. I think the mirror was around 1/4 wave. This is the first time I have tried a picture like this smile

The before and after focus picture were very similar, so I am only showing one picture. For reference I included a shot of a 60mm f8 fluorite lense.

Comments welcome !

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David Simons
Posted 09/01/2007 06:24AM #1
Dmitri Kulginov
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Location: Partille, SE

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Nice and smooth, with tons of CA 8)

David, can you make a picture with fewer stripes, 2-3-4?

Dmitri
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Posted 09/01/2007 09:25AM #2
John Biretta
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Looks nice so far. How about adding a green filter,
and then showing only 3 stripes?
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