Trying an old TV zoom lens

Discussion in 'Adapted Lenses' started by Deadbear77, Apr 14, 2018.

  1. Deadbear77

    Deadbear77 TalkEmount Hall of Famer Subscribing Member

    Sep 14, 2012
    Northeast Ohio
    Kevin
    4A92AFEC-4961-48C0-A4F4-60DAE172F245.jpeg

    Bought this lens, got it pretty cheap. Wanted to try it for video, turns out it’s a B4 mount. Had to buy an adapter for it. The adapter comes with a built in 2x extender, should make it usable on apsc without any vinyetting. Should make this lens about 28-330mm f1.7. Hopefully I will be able to detach the chords and mount box.
     
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  2. AlwaysOnAuto

    AlwaysOnAuto TalkEmount Hall of Famer

    Feb 17, 2015
    I've never heard of the B4 mount before.
    Cool project, hope it works out.
     
  3. davect01

    davect01 Super Moderator Subscribing Member

    Aug 20, 2011
    Fountain Hills, AZ
    Dave
    Never heard of this one before, best of luck with it :)
     
  4. Deadbear77

    Deadbear77 TalkEmount Hall of Famer Subscribing Member

    Sep 14, 2012
    Northeast Ohio
    Kevin
    Don’t even waste your time. Very heavy, dull image, hard to focus. The end.
     
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  5. addieleman

    addieleman Passionate amateur Subscribing Member

    Nov 13, 2012
    Netherlands
    Ad Dieleman
    Been there, done that (not with this lens). Sometimes a lens went up for sale the same day it came in.
     
    Last edited: Apr 15, 2018
  6. Hin Man

    Hin Man TalkEmount Veteran

    331
    Jan 18, 2013
    I have fujinon 75mm f/1.8 in C-mount and it is very unique especially in the flare department. I hope you can find a way to make it work as it can be a fun projects. I am a gear junkie and I am always intrigued with lenses that has a character. My Fujinon in c-mount is small and lightweight for a 75mm


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    by Hin Man, on Flickr
    Fujinon 75mm f/1.8 in C-mount next to a Contax G 90mm f/2.8


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    by Hin Man, on Flickr



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    alternativefacts

    by Hin Man, on Flickr
    A shot to protest the immigration hostility in our current adminstration



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    20160305-DSC00508

    by Hin Man, on Flickr


    I hate it when a lens doesn't surprise me or a dud that needs to go another home. Things happen and I always try to search online and ask for others for reference but I always go with the gut feel in purchasing. It doesn't work all the time but when it does, a treasure trove in my book as long as I don't accumulate to the point of no-usage and dust collection. My Fujinon is my specialty lens waiting for the rainy occasions as it has the ghostly flare that is very unusual and quite appealing for the novice in me.


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    Light Travelers

    by Hin Man, on Flickr



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    by Hin Man, on Flickr

    Cheers,
    Hin
     
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  7. WNG

    WNG TalkEmount Hall of Famer

    Aug 12, 2014
    Arrid Zone-A, USA
    Will
    Hin Man,
    The flaring is artistic and unique. Very appealing. I tried to adapt a C-mount zoom once, but the results were Meh. The image circle was too small and I can see shadows of the inner rails of the zoom mechanism in the images. How did you get entire frame coverage with this C-mount Fujinon? Unless these are cropped pics?
     
  8. Hin Man

    Hin Man TalkEmount Veteran

    331
    Jan 18, 2013
    Maybe I get lucky. I have tried three c-mounts with Fujinon 75mm f/1.8 and two versions of Fujian 35mm f/1.7. All seem to cover the entire Aps-c frame with no issues, some noticeable vignettes can be seen but not as a black circular rings blocking light to sensor. Maybe vignette actually varies with lenses. I find the Fujinon much less on Vignette when comparing it to my last copy of Fujian 35mm f/1.7. And I use similar thin adpater converting C-mount to E-mount. C-mount can't be used directly on FF as a crop is needed.


    10970301013_ce0292c391_h.jpg Fall Mosaic 10

    by Hin Man, on Flickr
    all shot with Fujian 35mm f/1.7 with NEX 5N when I first tried out c-mount. I still keep one copy of Fujian 35mm along with my Fujinon 75mmf f/1.8.

    I have not tried C-mount zoom for the same reason as I have seen various zoom that has serious vignette throughout the ranges in the zoom. I am still eyeing occasionally on a Fujinon or Sony C-mount zoom in the range of 12 to 70 f/1.7 and I have seen something like 16mm to 75mm f/1.8 as well. If such a C-mount zoom exists with correctable vignette and I am here to give it a try. Will need research before I can commit to a new project with C-mount zoom for both pictures and video. I am new to video but I do have interest in short clip for my own experiment and exploration.

    Cheers,
    Hin
     
    Last edited: Apr 15, 2018
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  9. WNG

    WNG TalkEmount Hall of Famer

    Aug 12, 2014
    Arrid Zone-A, USA
    Will
    Well, I think you lucked out on these primes. The 75mm has lovely rendering and 3D isolation.
    That's what I had tried, a 12-70mm f/1.8 by Toyo Optics. It looks identical to the Fujinon and I think another brand. I believe these were the same lens marketed between them.
    I can verify that it won't work with APS-C, so don't bother wasting time and money on one. Just a circle in the middle of the frame, hazy low contrast at the 12mm end and decent at 70mm. But the circle is fixed.
     
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  10. Deadbear77

    Deadbear77 TalkEmount Hall of Famer Subscribing Member

    Sep 14, 2012
    Northeast Ohio
    Kevin
    So this lens has a built in switch to magnify 2x. Without it you get the vinette circle, don’t forget my adapter also has a 2x magnification also. This makes the 1.7 lens gather a lot less light. It also has a macro switch. To get infinity focus on the short end of the zoom you need to have the macro switch about half way turned. If you zoom anywhere above halfway you have to switch off the macro completely. This is a royal pain in the ass. So in other words this lens in full frame mode is about 36/410mm 5.6 lens. With a lot of fringing and not sharp at all.
     
  11. WNG

    WNG TalkEmount Hall of Famer

    Aug 12, 2014
    Arrid Zone-A, USA
    Will
    For 480 lines of TV, it was probably considered great. ;)
     
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