The SMCP 135mm f 2.5 and SMCP 135mm f3.5 were both part of the lens line
at the same time. A high/low option. One had the choice of the fast
expensive lens of the slower bargain lens, I have examples of both, and
both are excellent performers, with the build quality you'd expect from
the original K series lenses, when inexpensive didn't didn't equal "cheap".
I also have one of the second version, of the SCMT 135mm f2.5, the same
optical formula as the SMCP 135mm. I can't remember the differences
between it and the earlier version, but I seem to remember finding the
information on the AHOC web page, (I could be wrong about that I may
have found that information elsewhere), and my copy definitely matched
the later version.
The SMCP 135mm f3.5 also was a carry over from the SMCT 135mm f3.5,
which seems to have been a carry over without optical changes, except
for the coatings and open aperture metering from the Super Takumar 135mm
f3.5.
On 7/25/2013 6:37 PM, Bob Sullivan wrote:
I don't know about that.
The last version of the Takumar Screwmounts were carried on in the 1st
versions of the K Mounts.
The first K135/3.5 (52mm filter) is different from the later K135/2.5
(58mm filter).
I've never seen a screwmount 135/2.5 Takumar design.
There are some sad 135/2.8 bayonet mount 'Takumars', but without SMC
coated glass.
Regards, Bob S.
On Thu, Jul 25, 2013 at 5:16 PM, Darren Addy <[email protected]> wrote:
But the Version 2 of the last Takumar would have been its equal.
On Thu, Jul 25, 2013 at 5:10 PM, Bob Sullivan <[email protected]> wrote:
The only Pentax 135mm that is better than the K135/2.5 is the A135/1.8.
(Screwmount, original K mount, newer K, M, A, F or FA)
Regards, Bob S.
On Thu, Jul 25, 2013 at 10:12 AM, Darren Addy <[email protected]> wrote:
Interesting article, thanks for the link.
It would seem that the optical change in the Super-Multi-Coated 135mm
f2.5 from version 1 (5 elements in 4 groups) to version 2 (6 elements
in 6 groups), the same optical design that was carried over to the
first SMC K version) was an example of a "silent change" made by
Pentax. They did change the Part Number (which dealers would have
noticed, and you can find stamped in the little A/M switch) but many
people are completely oblivious to the fact that these are (in fact)
*completely* different lenses with the same name. (In this case it was
an upgrade. The 6 element design (K) is one of the highest rated
Pentax lenses... 9.31 out of 10
http://www.pentaxforums.com/lensreviews/SMC-Pentax-K-135mm-F2.5-Lens.html)
Especially aggregious is the supposed "Review Page" on Pentax Forums
for the lens, which groups the two optical designs together so you
don't know if the reviewer is reviewing the one or the other.
http://www.pentaxforums.com/lensreviews/Super-Multi-Coated-TAKUMAR-Super-Takumar-135mm-F2.5.html
On Thu, Jul 25, 2013 at 10:00 AM, Darren Addy <[email protected]> wrote:
Had to Google those two acronyms:
"Two of the common languages spoken on forums are CAKWAF (Complete,
Absolute Knowledge Without Any Facts) and AFIDAWAB (Any Facts I Don’t
Agree With Are Bullstuff)."
On Thu, Jul 25, 2013 at 9:45 AM, Aahz Maruch <[email protected]> wrote:
Roger Cicala of lensrentals.com talks about silent lens upgrades and
makes a few snarky comments about the blogosphere along the way:
http://www.lensrentals.com/blog/2013/07/silent-changes
(Figured this was only semi-OT given the recent discussion about lens
differences.)
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