[OM] Re: Sigma 600mm mirror lens

[Chuck Norcutt]

Andrew L Wendelborn wrote:
> 
> Interested in opinions.
> 
> How does it compare (image quality wise) with
> 
>   i) 300/4.5 + 2XA
>  ii) Zuiko 500mm mirror?

----------------------------------------

The Zuiko mirror is far superior to the Sigma which is worse than most 
other mirror lenses.  Amongst mirror lenses, the Zuiko has excellent 
contrast.  Don't know about the 300 with multiplier.

Chuck Norcutt


 From Modern Photography Catadioptric Lens Tests                                
                

                                  Resolution    Contrast % @30
                                   lines/mm        lines/mm
Lens           Aperture Falloff Center  Corner  Center  Corner
                (in mm) (stops)                 

500/8.0 Zuiko   62.5    0.80    45      40      58      55
600/8.0 Sigma   75.0    0.82    37      29      37      29


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