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12-13-2008, 12:16 AM   #1
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Pentax Mount Equivalent for Canon 135mm F/2?

Nothing I've seen suggests anything like this exists, but I can hope, right?

(I know there are a fair number of 2.8 offerings, but the .8 makes a big difference in low light.)

Edit: Darn, posted in the wrong forum section. Requested thread be moved (thanks soccerjoe!)


Last edited by dantekgeek; 12-13-2008 at 12:23 AM.
12-13-2008, 12:22 AM   #2
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Re: moving the thread, there's a flag in the bottom left of your initial post. Report it and ask for it to be moved
12-13-2008, 03:52 AM   #3
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There is the Pentax A* 135/1.8. And also around that range; Voigtlander 125/2.5, Zeiss 100/2. But all of these are manual focus. I would also be very interested in a 135/2 lens for Pentax
12-13-2008, 04:17 AM   #4
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I hear you guys, a limited DA 100-135mm f/2 - 2.8 would be sweet. That and the DA15 would pretty much cover everything for me!

12-13-2008, 04:50 AM   #5
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no help here

Solid, sharp lens. great contrast, optically terrific even at F2, no noticeable issues...

That was one of my favorite lenses in any mount, and one of the best lenses ever. Nikon made a couple 105's that were almost as good or just about as good, but you won't even come close in Pentax mount near that focal length and not near f2. It would be like if there was an FA135 Ltd F2, that was the longer sibling to the FA77.

Don't know what to tell you, I'm sure you'll get a lot of suggestions for lenses in that focal range or suggestions for fast lenses, but you won't find a fast lens in that range with anywhere near the IQ of the Canon, one of about 2, maybe 3 "L" series lenses that are actually "L" worthy imho.

The DA*50-135 is nice, but it's 2.8 not 2.0 and best results to stay a little back from max 135mm. The DFA100 Macro and the FA100 Macro both sharp if sharp is what you want, but shy of 135mm and again, 2.8... Zeiss has a 100 macro as well, but it will be a manual aperture and focus and reported to be low contrast until stopped down.
12-13-2008, 05:23 AM   #6
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There is the Pentax K 135 F2.5. Not quite as fast, but only a 1/2 stop slower than F2.0. Excellent lens, but totally manual. Many here swear by it. Moderately fast, contrasty, excellent color rendition, and sharp sharp sharp.

NaCl(if it's not on the camera it's in the bag)H2O
12-13-2008, 12:22 PM   #7
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I own and can therefore recommend the A* 135 mm f1:1.8, but they are now getting both expensive and hard to come by, hope I don't ever have to replace it.
12-13-2008, 01:30 PM   #8
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vivitar 135/1.8 m42
vivitar 135/2.3 m42
and........canon fdn 135/2 on Pentax



Переделка объектива Canon FDn на Pentax - Форумы Пента-клуба


12-13-2008, 03:36 PM   #9
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Looks like the A* is about as close as I'll get, which is admittedly pretty darn close. I don't mind so much a manual focus lens as long as its auto-aperture (my mid-range zoom is covered by my nifty-fifty 1.4 A on the crop).

Anyone have any idea what these things are going for these days, or if they're even possible to come by? The only price I saw online was EUR1500 (!!) for a copy with pretty significant cosmetic damage.

Thanks for the suggestions.
12-13-2008, 05:10 PM   #10
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I hope hoya is reading this, we so do need a good 120-150mm fast tele,
12-13-2008, 05:37 PM   #11
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Yes, i know it's a half stop slower and not quite so long, but the IQ is unsurpassed...

Vivitar Series 1 105mm f/2.5.
12-14-2008, 02:17 PM   #12
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There is the Porst 135mm f1.8 manual focus lens: https://www.pentaxforums.com/forums/photographers-marketplace/41416-porst-135...-pentax-k.html
12-14-2008, 11:04 PM   #13
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A* 135mm f1.8 is supposed to be the untouchable legendary lens and you would get the recommendation from many people.

My use of this lens is plagued by its incredible macroscopic fringeing ability, only usable til f4 or so... It is only starting to become sharp in the centre after f2.8 or so...

Then Fa 135mm f2.8 is also prone to frineging wide open and this makes an unattractive option for me.

To mind you that Australian sun is rather harsh and strong so that these lenses do tend to create the fringeing problems in the outdoor environment...
12-14-2008, 11:18 PM   #14
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QuoteOriginally posted by NaClH2O Quote
There is the Pentax K 135 F2.5. Not quite as fast, but only a 1/2 stop slower than F2.0. Excellent lens, but totally manual. Many here swear by it. Moderately fast, contrasty, excellent color rendition, and sharp sharp sharp.

NaCl(if it's not on the camera it's in the bag)H2O
There's also an SMC Takumar (M42 screwmount) 135 f2.5 that I'm a big fan of. Of course that's also manual only and the K mount adapter is required.

You can see it here in a recent marketplace thread:

https://www.pentaxforums.com/forums/sold-items/34036-sold-smc-takumar-135mm-f...e-version.html
12-15-2008, 10:43 AM - 1 Like   #15
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QuoteOriginally posted by arkham Quote
There's also an SMC Takumar (M42 screwmount) 135 f2.5 that I'm a big fan of. Of course that's also manual only and the K mount adapter is required.

You can see it here in a recent marketplace thread:

https://www.pentaxforums.com/forums/sold-items/34036-sold-smc-takumar-135mm-f...e-version.html
The marketplace ad mentions that there are two versions of this lens. One is part number 43802 with 5 elements, and the other is part number 43812 with six elements. The part number is stamped into the bottom of the auto/man switch. Also the markings on the distance scale are different and 43812 is heavier.

Part number 43812 has the same optical design as the SMC Pentax K-mount version.

Here is an interesting test comparing the Canon to several other 135s including the S-M-C Takumar f2.5. The Takumar holds up very well. I believe there is a recent test of the K-mount version that shows it's competitive with the DA* 50-135.

http://oomz.net/135/
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