Build quality of 35 vs 50 is also a factor.
Actually, I was referring to the EF 50/1.8, not the more cheaply built 50/1.8 II. The former was equivalent in build to the 35/2 (metal mount, etc.), and cost close to 50% less.
I stand corrected, I think. Curious though, given that they haven't made the mark I 50mm f1.8 in over 22 years.Actually
the 50mm f1.8 mk1 and 35mm f2.0 were only produced concurrently for around 2 months, October to December 1990, when the 50mm f1.8 II was launched.
Maybe it was this small detail and your use of the present tense when you said "...the latter is
why the EF 50/1.8 is
so much cheaper than the EF 35/2.." that made me think you were talking about the present version of the 50mm f1.8. Actually
, you would have been clearer writing "...the latter was
why the EF 50/1.8 was
so much cheaper than the EF 35/2.."
But I apologise in any case.