Thanks for the info.
--- Yoshihiko Takinami <[EMAIL PROTECTED]> wrote:
> Hi,
>
> At 5 Feb 2001 07:30:06 -0800 (PST),
> Richard Saunders <[EMAIL PROTECTED]> wrote;
>
> > Tessar's are four elements, is the M50/4 macro a
> four
> > element lens a Tessa?
>
> It seems one of these designs commonly known as
> Tessar type.
>
> > The FA28-70/4 has a remarkable resemblence on MTF
> > curves at photodo.com to the Angeleux 28-70/2.8, I
> > believe the Angeleux were orginal designs.
>
> No. FA28-70/4 is an original design by Pentax.
>
> > I believe the FA50/1.4 is a standard formula with
> a
> > name?
>
> It is one of the designs known as double Gauss type,
> a
> very usual design for normal lens. And Pentax's
> Super-
> Takumar 50/1.4 was one of the first designs of this
> type.
>
> Needless to say, it is Pentax's original design.
>
> > The FA100/3.5 Cosina?
> > FA28-105 (new) and FA28-200 were these orginal
> Tamron design's
>
> They are just OEM lenses for Pentax.
> Most Petax lenses are original design by Pentax.
>
> Hope this helps.
> --
> Yoshihiko Takinami
> Osaka, Japan
> [EMAIL PROTECTED]
>
>
>
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=====
Regards
Richard Saunders
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