I should think that would depend very much on the index of refraction of
the cement used.
Chuck Norcutt
On 8/29/2014 11:52 PM, Fernando Gonzalez Gentile wrote:
It was thoroughly and not conclusively discussed some 10 years ago.
I think it's worth a new thread on this prime.
Also, I seem to remember Carlos Santisteban thought there was no
significant differences and possible complications regarding cementing
more elements in newer designs.
Fernando.
On Fri, Aug 29, 2014 at 9:28 PM, Chuck Norcutt
<chucknorcutt@xxxxxxxxxxxxxxxx> wrote:
I didn't know that but you can see it here
<http://olympus.dementix.org/eSIF/om-sif/lensgroup/85mmf2.htm> in the
"optical construction" part of the specs. One design is listed as 6
elements, 4 groups. Another (in parenthesis and presumably the older
design) is listed as 5 elements, 4 groups. Mine is a silver nose and
presumably 5 elements.
Chuck Norcutt
On 8/29/2014 7:11 PM, Ken Norton wrote:
At least three. There was also a very significant change in the design
that
resulted in a different number of elements.
On Friday, August 29, 2014, Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
wrote:
How many versions are there? More than three... single coated,
multi-coated (labeled), multi-coated (unlabled)???
Chuck Norcutt
On 8/29/2014 2:54 PM, Ken Norton wrote:
OK, so we have one more vote from the peanut gallery in favor of the
85/2. I won't ask, yet, which version.
--
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