Sorry, this is the post I should have put here. Also from John on
October 2, 2000. A bit more info
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According to my parts lists, there are 5 different 1.8s. The last three
types (type 3,4 and 5) have plastic diaphragm rings & focus rings. If
you look closely, you can see the parting lines left by the molds.
These 3 all have the 2 piece lens mount (compare to oldest SC type and
you'll know what I mean by 2 piece). Type 3 and 4 differ only in that
there are 2 different part numbers for the lens element group next to
the rear element, other lens elements in type 3 & 4 are interchangeable.
The other difference in type 3 & 4 is that one name ring says MC, the
other doesn't.
Type 3 & 4 started the practice of incorporating the front element, and
L2 into a sealed unit with the filter ring ((ZD3041).
Type 5 has the same rear element as type 3 & 4, but a totally different
front group (w/filter ring) (ZJ1669).
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But as Chris said the easiest way to recognize it is the "made in japan"
on the name ring in front. Often referred to here as the MIJ lens.
Chuck Norcutt
On 8/31/2011 9:01 PM, Chuck Norcutt wrote:
> From John Hermanson on June 7, 2005 from a discussion that was actually
> about multi-coating
> ----------------------------------------------------------------------
> As I recall, the fast wide angles (21/2, 24/2, 28/2, 35/2) were always
> MC. Type 1& 2 of 50/1.8 were SC, The last 3 versions of the 50/1.8
> (type 3, 4, 5) were MC. Type 3& 4 shared all the same parts except
> element group 2nd from the rear. Type 3 would have MC on the front name
> ring. Type 4& 5 were MC without any MC marking. Reflections in the
> front element of MC lenses would be a purplish green in color.
> ----------------------------------------------------------------------
> I'm pressing my recall ability here but I think #5 was considered the
> best but it also supposedly can be subject to sticky diaphragm but the
> lens is assembled with thread locker and may be extremely difficult to
> disassemble for cleaning. I have one and it works fine.
>
> Chuck Norcutt
>
>
> On 8/31/2011 7:29 PM, deebel wrote:
>> Can someone remind me of the variations of this lens produced over the
>> production period and whether any were particularly sought after?
>>
>> Thanks
>>
>> Dave
>>
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