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Showcase Tokina 17mm f/3.5 RMC II

Discussion in 'Adapted Lens Sample Image Showcase' started by scott, Dec 25, 2010.

  1. scott

    scott Mu-43 Veteran

    332
    Nov 15, 2010
    Snow on a magnolia; an early test picture in pretty flat light:

    5291594936_5160815437_z.
    (larger here)
    Tripod, aperture priority, f/11
     
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  2. scott

    scott Mu-43 Veteran

    332
    Nov 15, 2010
    A late-afternoon daylight test picture this time:

    5298252513_1e28d18cbb_z.
    Handheld at 1/125 f/11. ISO 100, EV -1/3
    (larger here)

    In general the lens seems to be very sharp, and the additional DOF is nice. (I used an online calculator to figure out focus settings for each usable aperture.) There's a little bit of barrel distortion, but it's only noticeable in certain pictures, and those can be adjusted.

    The lens is low on constrast at f/3.5, and diffraction reduces sharpness a lot at f/16. So the only useful apertures are 5.6, 8, and 11, but that's fine for what I need. Focusing at the 2-meter mark at f/11 gives usable DOF from 3 feet to infinity, so I can't complain.

    Any reactions to these pictures would be appreciated. I had some buyer's remorse that I didn't save up a bit more and buy a used Canon FD 17mm instead, but the distortion seems to be about the same, and the logical side of my head says this lens seems plenty sharp.
     
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  3. Stephen Geis

    Stephen Geis Mu-43 Top Veteran

    538
    May 13, 2010
    Charlotte, NC
    Scott,

    I think these photos look good. Especially like the first. That lens would make a great streer shooting tool ...

    Stephen
     
  4. scott

    scott Mu-43 Veteran

    332
    Nov 15, 2010
    Thanks, Stephen--I appreciate the feedback.
     
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  5. scott

    scott Mu-43 Veteran

    332
    Nov 15, 2010
    Some 100% crops (handheld):


    f/3.5 - soft, low on contrast



    f/5.6 -- good



    f/8 -- good


    f/11 -- still good...


    f/16 -- pretty bad. The shutter speed was 1/30, so I suppose there could be some shake blur, but in general this lens doesn't do well at f/16.
     
  6. scott

    scott Mu-43 Veteran

    332
    Nov 15, 2010
    Update on this lens--while it generally seems sharp and well-built, I discovered tonight that the focus scale is very inaccurate.

    I measured out 7, 8, 10, and 12 feet on the basement floor, since I planned to add a couple of focus marks (since the lens has a big gap between 2 meter and infinity). But when I focused on my test sheet, the lens scale read less than five feet when I was at seven feet; five feet when I was at 10 feet; and between 5 feet and 2 meters when I was at 12 feet.

    I tried a Pentax 55mm, a Micro-Nikkor 55mm, and a Canon 100mm, and they were all really close.

    Since I was planning to scale-focus the Tokina to maximize DOF, this could be a problem.
     
  7. scott

    scott Mu-43 Veteran

    332
    Nov 15, 2010
    An update, fwiw--with a few aluminum-foil shims in the adapter, I've gotten the focus scale about as accurate as I can. Right now when the lens is focused at 2m, the focus mark is in the small space between 2m and 5 feet. That much difference I can deal with.

    And, having looked over various sample photos, I think this is one of the best adapted lenses I've tried. Sharpness and contrast are very good. So I think I'll hold onto it as a slightly-wider backup for the 20/1.7, and just make a mental note to adjust slight when I need to scale-focus it.

    Here's a test picture, scale-focused at f/11 in today's dull pre-snowstorm light:

    5390549413_37d2a3f381_b.
     
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  8. grebeman

    grebeman Mu-43 All-Pro

    Mar 13, 2010
    South Brent, south Devon (UK)
    Barrie
    It's worth a lot, way to go Scott :smile:

    Barrie
     
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  9. Declan97

    Declan97 Mu-43 Veteran

    379
    Feb 3, 2012
    Padang, Indonesia
    This is 2nd time i see this lens result and yes its amazing wide sharp
     
  10. chasm

    chasm Mu-43 Veteran

    262
    Mar 2, 2010
    I like the way it renders. Quite immediate and involving. Unless of course that's just your PP skills!
     
  11. edmsnap

    edmsnap Mu-43 Veteran

    430
    Dec 20, 2011
    Edmonton, Alberta
    Longest-day-of-the-year sunset:
    Prairie_Sunset_-_02.
     
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