Olympus-OM
[Top] [All Lists]

[OM] Re: Apertures, where is f22 ?

Subject: [OM] Re: Apertures, where is f22 ?
From: "Jeff Keller" <jeff-keller@xxxxxxxxxxxxxxxx>
Date: Tue, 7 Jun 2005 13:38:47 -0700
The shorter the focal length the sooner diffraction kicks in when trying to
get high aperture numbers. A macro would probably give the option of a
higher f no. to give enough DOF at close focus distances. Diffraction would
still be a problem, but you have the choice of whether it's fuzzy because of
DOF or diffraction.

-jeff

> -----Original Message-----
> From: Der Eiserne Reiter
> 
> 
> Why do some lenses stop at f16 and others continue to f22 ? 
> Do other people care about f22 ? For instance, the 50/3.5 
> features f22, while the 1.2, 1.4, 1.8 do not.  Technically it 
> is feasible to get f22 with a wider lens, as was demonstrated 
> by C*non in the 50s with their
> 50/1.2 lens. Why do the 35/2.8, 28/3.5 and 28/2 not have f22 ?
> 
> Just wondering,
> 
> Roland.
> 


==============================================
List usage info:     http://www.zuikoholic.com
List nannies:        olympusadmin@xxxxxxxxxx
==============================================

<Prev in Thread] Current Thread [Next in Thread>
Sponsored by Tako
Impressum | Datenschutz