Re: [OM] (IMG) Deep Purple

[Chuck Norcutt]

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/