Re: [OM] Zuiko 50mm f 1.4 Optical Formula.

[P Bernad]

What is "groups"?
What is "elements"?

On Wed, 26 Jan 2000, Ángel Lobo wrote:

> Hi all.
> 
> On Dec. 5. Joseph writes: 
> 
> > on the subject of the 50/1.4, there were at least two different optical
> > formulas manufactured by Olympus for this lens, and only the latest
> > one rivals the 50/1.8's for sharpness.  
> > Cheers,
> > 
> > Joseph
> 
> 
> I don´t know two different optical formulas on this lens 50mm f 1.4.
> 
> >From the first times Olympus made this lens  with  7 elements /  6 groups.
> I´m I wrong ?
> 
> Joseph, what is the difference from one formula to other ?
> 
> Are you talking about the two different formulas of the 50mm f 1.8 ?
> 1ª  6 elements /  5 groups.
> 2ª  6 elements /  4 groups.
> 
> Or are you calling "different optical formula" the different coating
> treatments ?
> 
> 
> Ángel Lobo.
> CUENCA  ( Spain ).
> 
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> 


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