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Rokinon/Samyang 85/1.4 Adapted vs Native (Brightness difference?)

Discussion in 'Olympus Cameras' started by KBeezie, Jan 22, 2015.

  1. KBeezie

    KBeezie Mu-43 Top Veteran

    694
    Sep 15, 2012
    Grand Rapids, Mi
    Karl Blessing
    Something I'm considering is the Rokinon 85/1.4 which from samples seems rather nice, but I can get the pentax mount version for about $30 cheaper than the native micro-4/3rd version. And I already have two PK adapters (one tilts up to 8 degrees). But I'm wondering if there's a difference between the native and the pentax lens, they appear to be identical in the specs, though the native version appears to be larger/heavier , my guess is extra materials to fill the gap in registration distance, however just from pictures the rear element appears to be closer to the mount on the micro-4/3rd lens than it is on the pentax version.

    So mainly wondering if there's any significant advantage to getting the native micro-4/3rd mount version such as increased brightness or sharpness, whereas the Pentax mount version is cheaper, would fit on my old Pentax K10D (which I'll be selling anyways), but would also be able to tilt with my PK to M43 tilt adapter adding an additional element to the lens.

    In the sample thread there seems to be a mix of people using it natively or using it adapted (mostly Nikon or Canon as the original mount).

    Edit: The Samyang 85/1.4 for Pentax is 10$ cheaper than the Rokinon for Pentax, yet specs wise seems lighter than both the M43 and Rokinon version...
     
  2. mattia

    mattia Mu-43 Hall of Famer

    May 3, 2012
    The Netherlands
    The last bit has me confused. As far as I'm aware there is only one version of each lens per mount (and Samyang == Rokinon == Bower, all the same thing really), so any weight difference is probably a typo.

    There is always a slight risk of decentering with and adapter vs. Native mount, but a non MFT lens will probably be easier to sell again. Although I would then go for Canon or Nikon mount, not Pentax.
     
  3. KBeezie

    KBeezie Mu-43 Top Veteran

    694
    Sep 15, 2012
    Grand Rapids, Mi
    Karl Blessing
    They look somewhat different too.

    http://www.bhphotovideo.com/c/product/1018527-REG/rokinon_85m_mft_85mm_f_1_4_as_if.html
    http://www.adorama.com/SY85MPX.html
    http://www.adorama.com/RK85MP.html
    http://www.bhphotovideo.com/c/product/769398-REG/Rokinon_85M_P_85mm_f_1_4_Aspherical_Lens.html

    PS: I ended up getting a Rokinon 85/1.4 (Pentax) from a fellow user on here who also happens to be in Michigan for $230. If the De-centering comes the adapter then it'll be interesting as I haven't had a problem with my Pentax-M 50/1.4 or Tamron 90/2.8 1:1 yet, but we'll see.
     
  4. Turbofrog

    Turbofrog Mu-43 Hall of Famer

    Mar 21, 2014
    I would never buy a lens that is available for a DSLR format with a native M4/3 mount unless it was autofocus. For a fully manual Samyang lens, it's a no-brainer. You made the right choice, I'd say.
     
    • Like Like x 1
  5. edwardconde

    edwardconde Mu-43 All-Pro

    Nov 8, 2012
    Los Angeles, CA
    I used one with my old Pentax Kit.. and I loved it!