1. Reminder: Please use our affiliate links for holiday shopping!

Showcase PENTACON 2.8/135, preset, 15 blades iris

Discussion in 'Adapted Lens Sample Image Showcase' started by kwhunter, Jan 22, 2013.

  1. kwhunter

    kwhunter TalkEmount Rookie

    21
    Jan 16, 2013
    Ontario
    Dan
    Not a new lens to me, new to the NEX camera.
    2 generic images:#1 showing the circular aperture on an out of focus highlight; #2 out of focus foreground
    Both shot at 1/1600 and 1/320, ISO100, f/2.8

    DSC00238_zps6ced5111.

    DSC00243_zps99c3009a.
     
    • Like Like x 1
  2. kwhunter

    kwhunter TalkEmount Rookie

    21
    Jan 16, 2013
    Ontario
    Dan
    2 New pictures.

    #3: 1/640, f/11+0.3, ISO100
    _DSC0296_zps8adff71f.


    #4: 100% crop; Still very sharp
    _DSC0296_crop_zps2277cd3b.
     
    • Like Like x 1
  3. Bimjo

    Bimjo Super Moderator

    Oct 28, 2011
    Washington State
    Jim
    Looks like you have a winner here. Thanks for sharing. :)
     
  4. kwhunter

    kwhunter TalkEmount Rookie

    21
    Jan 16, 2013
    Ontario
    Dan
    Picture #5
    1/2500, f/2.8, ISO100, distance about 5 metres, snowing; subject slightly out of focus, soft bokeh.

    _DSC0310a_zps874e2e6d.
     
    • Like Like x 1
  5. eno789

    eno789 TalkEmount Top Veteran

    720
    Jan 1, 2012
    NoCal, USA
    Brian
    Is that the lens with a nickname of Bokeh Monster?
     
    • Like Like x 1
  6. davect01

    davect01 Super Moderator

    Aug 20, 2011
    Fountain Hills, AZ
    Dave
    Very nice shots, keeper for sure.
     
    • Like Like x 1
  7. kwhunter

    kwhunter TalkEmount Rookie

    21
    Jan 16, 2013
    Ontario
    Dan
    I think that's that one...
     
  8. kwhunter

    kwhunter TalkEmount Rookie

    21
    Jan 16, 2013
    Ontario
    Dan
    Thanks, I have the lens for a number of years and have been using it with my Canon system; I think it fits the NEX better, though.
     
  9. freddytto

    freddytto TalkEmount All-Pro

    Dec 2, 2011
    Puebla, Mexico
    I'm sure it is, in addition is very good lens, offer very good details and get focuses really good.
     
    • Like Like x 1
  10. Jefenator

    Jefenator TalkEmount Top Veteran

    876
    Nov 23, 2012
    Oregon, USA
    Jeff
    Sun Stars?

    My own un-scientific studies have revealed a preliminary correlation between blade quantity and sun star awesomeness. Here's 6 and 7 blades, respectively:

    indoor-sun-starz-2. indoor-sun-starz-1.

    I'll be very curious to see what results this 15-bladed Pentacon might produce. I understand, this being the time of year it is I might have to wait a while for any successful outdoor sun star tests! ;)
     
    • Like Like x 3
  11. kwhunter

    kwhunter TalkEmount Rookie

    21
    Jan 16, 2013
    Ontario
    Dan
    I might try to replicate your experiment but I'm missing the crystal orb... what can I substitute it with?
     
  12. Dioptrick

    Dioptrick TalkEmount All-Pro

    Feb 4, 2012
    New Zealand
    Anything that's shiny that can reflect light, like glass or chrome. The more stopped down the apertures are the more distinct the starburst become.
    Here's a burst with 14 blades - yes, from the humble SEL16 at f22.

    SEL1602.




    Btw, any chance you could post a photo of this wonderful Pentacon mounted on your NEX?
     
    • Like Like x 1
  13. kwhunter

    kwhunter TalkEmount Rookie

    21
    Jan 16, 2013
    Ontario
    Dan
    Will try that and... photo is right here:
    https://www.talkemount.com/f12/show...ns-looks-like-your-nex-camera-12/index26.html
    message #257
    and here some fresh pictures from today:

    IMG_0738_zpsd22c73c0.

    IMG_0739_zps5699f4bd.

    IMG_0740_zpsfa2439b0.

    IMG_0741_zps2b39ab70.

    IMG_0742_zps83f364e8.

    IMG_0743_zps2b9ef6ae.

    IMG_0744_zps32364f1c.
     
    • Like Like x 1
  14. kwhunter

    kwhunter TalkEmount Rookie

    21
    Jan 16, 2013
    Ontario
    Dan
    No awesomeness here, but I did not have the proper reflector.
    _DSC0322.

    Actually I found a good subject, but still no awesomeness (f/32) and I like better the out of focus reflections (f/2.8):

    _DSC0327_zps53250e4b.

    _DSC0326_zps862f3877.
     
    • Like Like x 1
  15. kwhunter

    kwhunter TalkEmount Rookie

    21
    Jan 16, 2013
    Ontario
    Dan
    Sunny day today so I thought I 'd try again:
    1st picture shot with the SEL24F18Z @f/22
    _DSC0409_zps40d8e374.
    2nd picture shot with Pentacon 135/2.8 @f/32
    _DSC0414_zpsfa1e3220.
    Different levels of awesomeness.
     

    Attached Files:

    • Like Like x 1
  16. Sela69

    Sela69 New to TalkEmount

    A7 & Pentacon 135. great combo !

    A rosebud is growing up before my eyes in this mild winter. I didn't miss the opportunity to capture this beautiful gift with my Pentacon Bokeh monster :

    16027276068_5f4453ef36_c.
     
    • Like Like x 3
  17. MAubrey

    MAubrey TalkEmount Top Veteran

    It's even versus odd.

    An even number of blades will reproduce as many light points as there are blades. An odd number of blades will reproduce twice the number of light points. So this 15-blade lens should produce 30-point stars! I wonder if you can even distinguish so many...
     
  18. siftu

    siftu TalkEmount Regular

    26
    Jan 30, 2016
    I picked up a copy of the Pentacon 135mm f2.8 exakta mount 15 blade in zebra stripes. I got it for $75 which seemed like a bit of a deal to me. I was expecting it to be a lot softer than it is. Again as expected with a lens of this vintage is suffers a little CA wide open but it's sharpness pleasantly surprised me.

    DSC04757.

    DSC04771.
     
    Last edited: Apr 2, 2016
    • Like Like x 4