I figure, if the source of the lenses, Olympus Tokyo, prints 5 parts lists
(type 1,2, 3, 4 and 5), then there are five types, and that is a more
accurate record than measuring lens length, or anything we could all decide
makes up a lens "type".
Last 50 1.8 type (type 5) is VERY different from type 2. Type 2 front
element is LC0651 and rest of lens shares virtually no common parts with
Type 5 (front element # LCZJ1669 ((part of filter ring)). Type 2 is 6
elements / 5 groups, Type 5 is 6 elements / 4 groups though first 2 groups
(front element and group 2) cannot be disassembled or replaced separately
(front element is "crimped" in place. :-o)
John
Camtech
Richard Schätzl wrote:
> Beg your pardon...
>
> I was asking, because I´ve a 1,4 50mm, MC, 39mm long, Zuiko and wanted
> to know if it has already reached the climax of optical evolution, or is
> the 40mm long, non MC marked (but still MC), Zuiko (now extinct),
> another optical sumit (Mount Olympus) to reach?
>
> Speak: Is the last version and the second version identical in there
> optical properties?
>
> John Hermanson wrote:
> >
> > Uh oh, here we go again...
>
> Sorry, I hope I´ve not to pay your pills against the pain ;-)
>
> > Olympus made enough changes during production of the 1.8 to have
> > 5 different parts lists, though some changes were as simple
> > as Type 3 (sayting MC on the name ring,
>
> I wouldn´t count here changes in coating as design changes, like
> changing the tyre type on a car.
>
> > front element part of filter ring assy,
>
> With plastic aperture ring? did they change to 5/4 design?
>
> > to Type 4 with same front element w/ filter ring but NO MC on the
> > name ring (still multicoated though).
>
> Paul D. Farrar wrote of 6/5 and 6/4 design version of the 1,8, did they
> exist?
>
> Richard
>
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