Split subjects Moose writes:
<<In what may or may not be an analogous situation, using the same sort of
logic, I tried the recent Panny 12-60, released a year ago. Decent lens, but
not a patch on the Oly 12-100. Haven't done the careful tests yet, but it
<<looks like the PLeica 12-60 is more like the 12-100. so the mere fact that a
Panny lens is a recent design doesn't necessarily mean superior IQ.
I trust you would assume that MSG would be too obsessive compulsive as not to
have at least some data to support the possible suitability of the new Panny
100-300 as not to mislead esteemed list member, Philippe. Unfortunately not
much published data and difficult to find MTF. The previous incarnation was
not bad from a resolution standpoint but AF many times observed to be
s-l-o-w, clearly removing it from any consideration. Noodling around for
awhile located some images of the new lens and comments that AF was quite good.
It has better weather sealing as well. Might be worth a trial using the Lion
in the Living-room (pet kittie) to see if it could suit and send back it it did
not. PL 100-400 is more of a sure thing but bigger and pricey.
<<<SI have noticed indications to lead me to suspect that extension isn't
always best. I wanted a close-up adapter for the Panny 14-140 on GM5 in my
light/casual kit. So I did some not too formal testing.
<<< <cid:part1.B8D79E03.5CCE9249@gmail.com>
Something happened to the links??
<<I was chatting with Ctein the other day, about too many topics in a brief
meeting, and mentioned this suspicion. He was the one who thought the fine
balance between exit pupil/angle and sensor stack thickness might be a <<factor.
I agree that is an interesting conjecture and glad you fleshed it out a bit
more. You provide some circumstantial evidence of its veracity. The
hypothesis will likely never be directly tested on MFT. However there are a
few people on FM alt lens forum who own both Kolari modified sensor stack
A7r(or II) and a non modified version. On could take a system lens known to
behave well (most) with the Kolari mod and see if a large amount of extension
affected relative performance. At least some info would be gleaned on the
effect of moving the exit pupil with different sensor stack thicknesses. The
slight degradation of some lenses with the thinner stack might make the
analysis difficult but it may prove to be very enlightening.
<<<We aren't in unit focusing MF lens land any more, Dorothy.
I am stung and dismayed by your disparaging attitude towards Kansas. As you
knew or should have known, there is an obscure cluttered alley way off the
yellow brick road
that leads directly to my office. There is indeed a small piece of Kansas in
South Hamilton. Big Foot, his little brother ( Cosina Voigtländer 90mm f/3.5
APO-Lanthar) and Big Brother (CV 180/4) reside there.
They are of relative recent design, have a beautiful rendering, tack sharp, as
well as focus with a normal helicoid. They function admirably with extension
and out-resolve any sensor I have or will have in the near future.
There's no place like home, Mike
--
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