RE: Vivitar 35-85 better than Pentax 24-90?

[J. C. O'Connell]

yes for 4 to 6 element designs,
no for 12 to 15 element desings.
JCO

> -----Original Message-----
> From: Paul Franklin Stregevsky [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, January 22, 2003 10:07 PM
> To: 'Pentax-Discuss'
> Subject: RE: Vivitar 35-85 better than Pentax 24-90?
> 
> 
> "J. C. O'Connell" [EMAIL PROTECTED] wrote:
> There is a trade off to adding elements:
> 
> A. on one hand they reduced abberations IF precisely ground and placed
> 
> B. BUT on the other hand, the extra air glass surfaces REDUCE 
> contrast (and
> apparent resolution).
> 
> Didn't Super Multicoating (SMC) all-but-eliminate that tradeoff by making
> loss of contrast nearly inconsequential?
> 
> [EMAIL PROTECTED]
>  
> 
>