Didn't know they had that type of design back then, always thought that 
was more of a modern design.  Nice.  I notice on Boj's site that the 
resolution numbers are slightly better for the "m", so I suppose the 
compromises they made were well done. Perhaps it is not quite as good 
wide open?  As soon as the weather breaks, I am going to find out how it 
performs wide open.

Dave




J. C. O'Connell wrote:
> The K28/2 was an all out expensive floating
> element design which optimizes image quality
> at all focussing distances and apertures,
> the M28/2 was not. The M28/2 was compromised
> for price and much smaller size/weight considerations instead.
> 
> The K28/2 is most unusual for a 28mm lens,
> it has a barrel profile very similar to a typical 105mm/2.8 lens!
> jco
> 
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of
> Jim King
> Sent: Tuesday, February 13, 2007 1:22 PM
> To: [email protected]
> Subject: Re: WTB: Pentax K 28mm f2.0 Lens
> 
> 
> David Weiss wrote on Mon, 12 Feb 2007 19:37:42 -0800
> 
>> I wonder how that [the K28/2] is rated?  I have the "M" version of
>> that lens.  What
>> do you think of the optical qualities of the "M" version?  Is it more
>> rare than the "K"?
> 
> According to Boz's site, the K28/2 is an entirely different design  
> than the M28/2, with one additional element, and it weighs almost  
> twice as much.  Takinami says that along with the K28/3.5, it's the  
> best of the Pentax 28s.
> 
> I have the M28/2 already and if I ever get the K28/2 it will be  
> interesting to compare them.
> 
> Regards, Jim
> 


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