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09-09-2015, 02:07 PM   #1
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Lens to replace M 135/3.5 (K135/M150/...)?

I'm looking for little better lens than my SMC M 135/3.5 (this is lovely lens that I will keep definitely). By "better" I mean sharper/lower abberations/more contrasty and evetually longer FL (I want use it with my Pentax Q also, so 150 mm will be significant upgrade). I have 135 mm lens with better bokeh and also do not need faster

I'm considering SMC (K) 135/3.5 (is it really sharper then M version?), M 150/3.5 (is it at least equal quality wise?) and SMC M 75-150/4.

Please share any personal experience comparing one of these with M 135.

09-09-2015, 02:16 PM   #2
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Did you consider the Samyang 135mm? It comes in K-mount and has A-mode on aperture ring. By all reviews it seems like a stunning lens. Not as cheap as some other Samyang lenses, though
09-09-2015, 02:23 PM   #3
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how much longer of a focal length are you looking for? you mention 150mm, but I have an A 200mm f4 that is amazingly sharp.....
09-09-2015, 02:36 PM   #4
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A couple of people are using single touch zooms in the Single In challenge right now. I think they are both using the A70-210 which is a great lens but both of them are having some issues with trying to nail focus and zoom at the same time - the fact that one ring controls both (which is also true of the M zoom you mentioned) has made this more difficult. On the Q I imagine that would be even more complicated. Additionally some people say you are better off with C lenses than K due to the optimization for smaller optical circle. Just a thought. I have an 80-200M f/4.5 series I would sell for a pretty inexpensive price but you face the same thing as with the 75-150 - single push/pull zoom & focus. I also have a Takumar Bayonet f/2.5 but I doubt that it would be sharper than the f/3.5 SMC lens.

09-09-2015, 02:49 PM   #5
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QuoteOriginally posted by Na Horuk Quote
Did you consider the Samyang 135mm? It comes in K-mount and has A-mode on aperture ring. By all reviews it seems like a stunning lens. Not as cheap as some other Samyang lenses, though
This, if you're looking for a big upgrade.

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09-09-2015, 03:22 PM   #6
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Thanks for all replies so far. I look for relatively small lens and small upgrade in quality would be enough (for a fair price). For 200-300 range I have Tamron SP 60-300 which is great, but bulky. Tad better 135 mm lens is ok, good 150 mm even better (150 mm is for me handholding limit with the Q). I do not intend to buy K 135/2.5 or the new Samyang. Of course I want to use it on my DSLR also.
09-09-2015, 03:44 PM   #7
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QuoteOriginally posted by Piotrek K Quote
Lens to replace M 135/3.5 (K135/M150/...)?
Hows about SMC Pentax-A* 135mm F1.8, IMHO you'll find none finer than this.
09-09-2015, 06:04 PM   #8
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It will be find a small lens sharper than the 135 3.5. I had the SMC-A 135 2.8 but maybe I had a bad copy, I sold it because I thought the SMC-A 70-210 was a better lens. But it's quite bigger. The Vivitar Series 1 70-210 is also very good but it's even heavier.

I now also have a cheap 32 dollar Takumar Bayonet 135 2.8 for when I don't want to carry the zoom.

09-09-2015, 06:27 PM   #9
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The lens I use the most on my Q is a series 1 70-210/3.5 version 1

I find better control of ca than the tell lenses from Pentax I the K/M range primes
09-09-2015, 07:07 PM   #10
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The best telephoto lens I have used adapted on the Q/Q7 is the DA*300/4.0 - by a long margin. That might be more lens than you are looking for, but for wide-open sharpness and chromatic aberration control I have found nothing better.
09-09-2015, 08:30 PM   #11
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Two things
  • the K135/3.5 has received pretty darned good reviews in the Q sample threads and it's at least $100 less expensive than the 2.5
  • barondla has discovered, especially around 100 - 150, that tricking the Q/Q7 by entering the next step up in FL for the SR helps increase sharpness dramatically.
09-09-2015, 10:08 PM   #12
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The M 75-150mm is much, much better than the 135/3.5. It's the best lens around the 135mm focal length that I've ever used. It's also reasonable common and quite cheap.
09-10-2015, 12:42 AM   #13
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Thanks for all the replies! I would rather stick to SMC K-mount lenses and smaller lenses. That's why I'm considering M 75-150, K135/3.5 and M 150, not 2.5 or 1.8 variants. I do not plan to spend much money, so I also do not expect much better quality compared to my M 135. M 135/3.5 is great - handy and really good lens. Just tad longer/better quality but still easy to pack and handhold lens would be perfect for me.
09-10-2015, 05:55 AM   #14
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I have the Pentax M 135mm/3.5 but prefer to use a Super-Takumar 135mm/3.5. I don't know if it's any better but it is beautiful- a work of art!
cheers
bb2
09-10-2015, 10:16 AM   #15
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RARE Clean Super Takumar 150mm F4 Camera Lens Pentax SMC Multi Coated M42 1 4 | eBay

Pentax Super Takumar 150mm F4 Manual Focus Screw Mount Lens 18674 | eBay


The M75-150 is considerably heavier than the SuperTakumar 150. (465g vs. 324g)
Your current M135 f/3.5 is a bit lighter (270g) and the K135 f/2.5 is heavier (500g) but not much heavier than the M75-150.

NOTE: I am not affiliated with these sales. Just passing along what I see.
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