Re: [Leica] no. of blades

["Dan Post" <dwpost@email.msn.com>]

Interesting- I had heard that the greater the number, the rounder the
aperture and hence somewhat better image formation ( diffraction?). I also
read that a moving aperture makes for a better picture- some early P&S
cameras , and one of Nikon's recent ones have no aperture per se. The
shutter acts as an aperture- opening partially in bright light, and all the
way in dim light. The Nikon, which I just checked, has a three
bladed/shutter/iris.

- -----Original Message-----
From: Alfred Breull <puma@hannover.sgh-net.de>
To: leica-users@mejac.palo-alto.ca.us <leica-users@mejac.palo-alto.ca.us>
Date: Wednesday, December 17, 1997 4:43 PM
Subject: Re: [Leica] no. of blades


>Yes. Number, area (amount), shape - compare small, bright out-of-focus
>areas from a Summar (like a ring), Summitar (cirle), Summicron (spot),
>or opposite light (?, sun/ sunreflections direct into the lens) pix
>with the different shape, area, and number of "rays" around the sun, etc.
>
>Alf
>----------------------------------
>At 20:25 16.12.1997 -0800, "Arnold Don Abravanel" <arniea@loop.com> asked:
>>Does the amount of blades in a lens add or detract to value or operation
of
>>a lens??
>
>