When in doubt, consult Boj Dimitrov. The K-mount pages tell me that
the F50/1.4 weighs 230g, while the FA50/1.4 weighs 220g. Considering
that the FA lens also has the addition of the MTF chip, the difference
is probably because polycarbonate has replaced metal in the lens's
construction. 10g reduction seems about right because the metal in
the F would most likely have been aluminium, not brass like Takumars
of old. .
Thinking about what a fragile metal aluminium is, polycarbonate may
actually be stronger and more impact resistant and not necessarily a
backward step.
regards, Anthony
"Of what use is lens and light
to those who lack in mind and sight"
(Anon)
2009/9/12 P. J. Alling <[email protected]>:
> I have a couple of F lenses, the build seems to be a bit better than my FA
> lenses. Some seem to contain a substantial amount of metal. I don't
> actually have either the FA 50mm f1.4 or the F 50mm f1.4 so I can't say
> that;s the case as far as these lenses are concerned thought most reviews
> mention the FA's plastic construction.
>
> Miserere wrote:
>>
>> 2009/9/10 J.C. O'Connell <[email protected]>:
>>
>>>
>>> Ive noticed lately that the used F50/1.4 lenses are pulling
>>> in high money lately on ebay, even more than the FA version
>>> brand new in some cases. Anybody know what all the differences
>>> are between these two lenses are optically, mechanically,
>>> funcitonally, etc? Maybe its just a collector thingy or
>>> maybe the F version is better in some way?? I have never owned
>>> either one of them.
>>>
>>
>> Doesn't anybody know? I'm curious now :-)
>>
>>
>> --M.
>>
>>
>>
>
>
> --
>
>
> The free man owns himself. He can damage himself with either eating or
> drinking; he can ruin himself with gambling. If he does he is certainly a
> damn fool, and he might possibly be a damned soul; but if he may not, he is
> not a free man any more than a dog.
>
> --G. K. Chesterton
>
>
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