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Showcase Pentax 135mm f2.5 SMC-K

Discussion in 'Adapted Lens Sample Image Showcase' started by nickthetasmaniac, Sep 28, 2011.

  1. nickthetasmaniac

    nickthetasmaniac Mu-43 All-Pro

    Jan 11, 2011
    This thread is for the K-series version of this lens, which has the following printed around the front element: SMC Pentax 1:2.5/135 - serial number - ASAHI OPT. CO., JAPAN.
    It is one half of Pentax's classic f2.5 K-series telephoto pair (the other being the SMC 200/f2.5) and is highly regarded by Pentaxians.

    Here is the user-review page from Pentax Forums, which has quite a lot of useful info: Pentax 135mm F2.5 Reviews - K Prime Lenses - Pentax Lens Reviews & Lens Database :smile:

    This is not the same lens as the K-mount Pentax Takumar-Bayonet 135/f2.5, which has pretty average optical and build quality and should not be confused with the legendary M42-mount Takumars.

    Here's a few quick test shots on the GH2 with a Fotodiox adapter. For what it's worth, this is about as much weight as I'd be comfortable mounting with this adapter... If I get around to getting the K200/f2.5 I'd probably start looking at the Novoflex or Voigtlander adapters.

    Both wide open at f2.5

    6193261405_b2de886fb7_b.

    6193777402_10beebb0aa_b.
     
    • Like Like x 4
  2. addieleman

    addieleman Mu-43 All-Pro

    Aug 5, 2010
    The Netherlands
    Ad
    Beautiful bokeh!
     
  3. nickthetasmaniac

    nickthetasmaniac Mu-43 All-Pro

    Jan 11, 2011
  4. nickthetasmaniac

    nickthetasmaniac Mu-43 All-Pro

    Jan 11, 2011
    I've been giving this lens a flogging over the last few days and have developed some initial thoughts...

    It's sharp, very very sharp... From f4-11 I see no discernible difference between this and the modern teles I have experience with (DA* 50-135/f2.8 and ZD 50-200 SWD). Even at f2.5 it's better that I expected from a lens of this generation.

    Bokeh is good but not mind-blowing. It's nicely uniform and undistracting, but it doesn't have the gorgeous dreamy-ness of my Nokton 25mm and K50/f1.2 (not that I expected it too...).

    CA's are a pain in the ass at all apertures. To be expected, this is a common complaint with this lens and a general issue fast film lenses when used on digital...

    Build quality is amazing. Tactically different, but on the same general level as the Nokton :smile:

    6202788461_14405b6eec_b.
    f5.6

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    f2.5

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    f4
     

    Attached Files:

  5. Christilou

    Christilou Mu-43 Top Veteran

    657
    Feb 25, 2010
    Camberley, Surrey
    Nice images here. I was wondering if it's possible to get an adapter for the EP3 to Pentax FA lenses and if so, which do you recommend?
     
  6. nickthetasmaniac

    nickthetasmaniac Mu-43 All-Pro

    Jan 11, 2011
    Yep any of the PK-m43 adapters will work with FA lenses (although you won't have Auto Focus...). I use one from Fotodiox which is cheap and decent. If you want to spend more the Voigtlander and Novoflex versions are very nicely made. Basically, you just need to make sure the adapter supports infinity focus (all but the cheapest/shoddiest do).

    The only lens series you have to worry about is the current APS-C specific DA-series, as these are designed to have the aperture set by the body and don't have a manual aperture ring on the lens...
     
  7. Christilou

    Christilou Mu-43 Top Veteran

    657
    Feb 25, 2010
    Camberley, Surrey
    Okay, thank you Nick :)
     
  8. nickthetasmaniac

    nickthetasmaniac Mu-43 All-Pro

    Jan 11, 2011
  9. nickthetasmaniac

    nickthetasmaniac Mu-43 All-Pro

    Jan 11, 2011
    An almost 100% crop shot with the GH2. I think this was at f8.

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