Subject: | Re: [OM] (IMG) Deep Purple |
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From: | Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx> |
Date: | Sat, 06 Jun 2009 13:51:02 -0400 |
I'm still surprised to see that much obvious diffraction around the blades. I've never seen that before. Chuck Norcutt Carlos J. Santisteban wrote: > > Chuck Norcutt wrote: >> Very nice and also very interesting. I'm wondering why the moon is >> rendered with 6 diffraction spikes. It look more like it was taken with >> an Newtonian telescope with a 3 arm spider than the 21/3.5. > > Because the 21/3.5 has a six blades diaphragm... and wasn't fully open -- I > believe f/5.6 is the optimal aperture on the tiny 21. > > Cheers, -- _________________________________________________________________ Options: http://lists.thomasclausen.net/mailman/listinfo/olympus Archives: http://lists.thomasclausen.net/mailman/private/olympus/ Themed Olympus Photo Exhibition: http://www.tope.nl/ |
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