The K 135 f3.5 and the M 135 f3.5 have very different designs, the
former being a 4 element 4 group the later being 5 element 5 group, the
M is also quite a bit shorter and lighter than the K roughly a 1/2 inch,
(12mm to be exact), and about a quarter pound lighter, despite the M
having a built in lens hood. You can look at the specification for the
M here <http://www.bdimitrov.de/kmp/lenses/primes/tele/M135f3.5.html>
and the K here
<http://www.bdimitrov.de/kmp/lenses/primes/tele/K135f3.5.html> there are
links to images of the optical designs and everything.
On 8/17/2014 9:22 AM, Zos Xavius wrote:
PF users rate the K 135/3.5 as superior to the M counterpart, but I've
also heard the opposite being true. I may be wrong, but I believe both
have the same optical fomula. Pentax clearly did some tweaking to
formulas though between the two series because the K series
counterparts generally perform slightly better according to reviews.
On Sun, Aug 17, 2014 at 8:43 AM, Stanley Halpin
<[email protected]> wrote:
15± years ago confusion about the 135mm lens lineup was the reason I went
looking for information. And found what later became the PDML. And found a
range of opinions and advice. I gathered and synopsized all of the opinions
about all of the 135mm offerings and that was the beginning of my (now dormant)
online repository of opinion on Pentax lenses.
WRT 135mm, the consensus was that the best was the A 135/1.8, next was the K
135/2.5, but a close competitor to both of these was the M 135/3.5.
stan
On Aug 16, 2014, at 8:59 PM, Zos Xavius <[email protected]> wrote:
This explains all the mixed reports I've heard about the K 135 2.5. A
big part of me wants to fill my bag with nothing but K series glass.
My back might not like that though...
On Sat, Aug 16, 2014 at 11:29 AM, Bob Sullivan <[email protected]> wrote:
Yes, the weak Takumar 135/2.5 in K mount has a multicolored dof scale
on the barrel - always easy to spot on ebay. I also believe it is not
multicoated glass. The older SMC K 135/2.5 is an excellent lens,
second only to the A135/1.8. Most people don't know about it.
Regards, Bob S.
On Fri, Aug 15, 2014 at 11:31 PM, Darren Addy <[email protected]> wrote:
Bob,
Sorry, I should have explained that part a bit better for those who
are unaware of the confusing state of Pentax's 135mm f2.5 offerings.
Here are the versions of the 135mm f2.5 made by Pentax:
Screwmount:
1) Super Takumar and S-M-C Takumar Version 1
2) S-M-C Takumar Version 2 (6 element design)
K-mount
3) SMC K 135mm f2.5 (6 element design)
4) Non-SMC & confusingly named "Takumar Bayonet" version which you can
find almost anywhere for $50/60.
So I was making the point that the one I am offering (3) is the same
optical design as (2) but not to be confused with the vastly inferior
(4).
Hope that clears things up.
On Fri, Aug 15, 2014 at 11:12 PM, Bob Sullivan <[email protected]> wrote:
A bit confusing offer.
There is a SMC K 135/2.5 lens in a K bayonet mount, but you say NOT BAYONET.
So are you offering a screwmount version? Why not say so directly?
Regards, Bob S.
On Fri, Aug 15, 2014 at 6:40 PM, Darren Addy <[email protected]> wrote:
As you probably know, this is the K-mount version of the acclaimed
Super-Multi-Coated Takumar 135mm f2.5 (version 2), the 6-element
design. This is the finest optical design Pentax made in the 135mm
focal length. On a DSLR it gives you the equivalent of a 200mm FOV and
f2.5.
This one is gorgeous cosmetically, optically, and mechanically and
comes with the original clip on hood, front & rear caps, and matching
"SMC Pentax" hard case. If you are picky about the used lenses you
purchase, this one is for you.
$199 plus actual shipping cost to your address. Email me off-list for a quote.
I prefer not to use Paypal, but would be happy to issue you a Square
Invoice if you desire to pay by credit/debit card.
Respectfully,
Darren Addy
Kearney, NE
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