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Thread: CZJ Tevidon versus Fujinon CCTV

  1. #1
    Senior Member RichA's Avatar
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    CZJ Tevidon versus Fujinon CCTV

    CZJ Tevidon 25mm f1.4 versus Fujinon CCTV 25mm f1.4. Both lenses at f1.4.
    Interesting differences in colour, distortion.

    Fujinon:


    CZJ Tevidon:

  2. #2
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    Re: CZJ Tevidon versus Fujinon CCTV

    Sure it's not the same picture duplicated? =) They look identical to my un-trained eye. Same manufacturer, different brand perhaps?

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    Re: CZJ Tevidon versus Fujinon CCTV

    They are from two different lenses but there are no "obvious" differences wrt to color and distortion.

    The only thing that appears to differentiate the two are the shape of the OOF highlights on the Olympus lens.

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    Senior Member Amin's Avatar
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    Re: CZJ Tevidon versus Fujinon CCTV

    Looking at the close edge of the table, the CZJ shows more barrel distortion. The CZJ bokeh also looks smoother to me (disregarding the OOF highlights).

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    Senior Member apicius9's Avatar
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    Re: CZJ Tevidon versus Fujinon CCTV

    Quote Originally Posted by Amin View Post
    Looking at the close edge of the table, the CZJ shows more barrel distortion. The CZJ bokeh also looks smoother to me (disregarding the OOF highlights).
    Interesting, thanks for the comparison. I also thought the difference was minimal, maybe even slightly in favor of the Fujinon IMHO. Is that the Fujinon lens that needs a bit of machining to fit the adapter? I think I have that somewhere...

    Stefan

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    Senior Member RichA's Avatar
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    Re: CZJ Tevidon versus Fujinon CCTV

    Quote Originally Posted by photoSmart42 View Post
    Sure it's not the same picture duplicated? =) They look identical to my un-trained eye. Same manufacturer, different brand perhaps?
    I don't think Fuji ever made Zeiss lenses. Also the glass is physically different.

  7. #7
    Senior Member RichA's Avatar
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    Re: CZJ Tevidon versus Fujinon CCTV

    Quote Originally Posted by apicius9 View Post
    Interesting, thanks for the comparison. I also thought the difference was minimal, maybe even slightly in favor of the Fujinon IMHO. Is that the Fujinon lens that needs a bit of machining to fit the adapter? I think I have that somewhere...

    Stefan
    At 100%, the Fujinon shows higher resolution, likely due to lack of coma. Both of them need some machining/adapting to reach infinity focus.
    Last edited by RichA; 19th January 2010 at 20:25.

  8. #8
    MelanieC
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    Re: CZJ Tevidon versus Fujinon CCTV

    Which Fujinon is that? I have a 25mm/1.4 Fujinon CCTV lens, but it vignettes so heavily that I have to shoot in square.

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    Senior Member RichA's Avatar
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    Re: CZJ Tevidon versus Fujinon CCTV

    Quote Originally Posted by MelanieC View Post
    Which Fujinon is that? I have a 25mm/1.4 Fujinon CCTV lens, but it vignettes so heavily that I have to shoot in square.
    It's the one you've got, and there is some vignetting, but it isn't hard (complete cutoff, like with say the Cosmicar 12.5mm f1.4) and is mostly acceptable at f5.6 or narrower. The shots I posted were done at f1.4 for both lenses.

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    Re: CZJ Tevidon versus Fujinon CCTV

    Quote Originally Posted by MelanieC View Post
    Which Fujinon is that? I have a 25mm/1.4 Fujinon CCTV lens, but it vignettes so heavily that I have to shoot in square.
    Which one have you got? There is more than one Fujinon-TV 25/1.4 lens in c-mount.

    One does not vignette to the extent you say it does and that one is-

    Fujinon-TV CF25B 25mm f/1.4.

  11. #11
    MelanieC
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    Re: CZJ Tevidon versus Fujinon CCTV

    Here's what mine does at 1.4:



    It looks more extreme than your copy, or maybe I'm seeing things. Mine is model HF25HA. I really like it, especially for a sub-$75 lens.

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    Re: CZJ Tevidon versus Fujinon CCTV

    Melanie, The HF HA would do what the CB does not.

    BTW, the HF HA is a "mega pixel" class lens from Fujinon. The CB is an older, run of the mill (ie not "megapixel")
    variety.

  13. #13
    MelanieC
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    Re: CZJ Tevidon versus Fujinon CCTV

    Hi Vivek, I'm afraid I need a translation. What does the CB do exactly? And is Rich's Fujinon the CB variety? I like to shoot in square so losing the corners doesn't bother me.


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    Re: CZJ Tevidon versus Fujinon CCTV

    Melanie, See: http://forum.getdpi.com/forum/showthread.php?t=12893 for an example.

    Yes, the coverage is nearly complete there with very little edge darkening. That is what the CF25B version does.

  15. #15
    MelanieC
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    Re: CZJ Tevidon versus Fujinon CCTV

    Ah, OK. Sorry, I didn't see your reply right above mine. Thanks for the info. At least I didn't have to file mine down to make it fit!

  16. #16
    Senior Member RichA's Avatar
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    Re: CZJ Tevidon versus Fujinon CCTV

    Quote Originally Posted by MelanieC View Post
    Here's what mine does at 1.4:



    It looks more extreme than your copy, or maybe I'm seeing things. Mine is model HF25HA. I really like it, especially for a sub-$75 lens.
    Definitely doesn't vignette to that extent. My lens has no number on it, but here is how it vignettes:

    http://www.pbase.com/andersonrm/cmou...n_panasonic_g1

  17. #17
    eugenecctan
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    Re: CZJ Tevidon versus Fujinon CCTV

    Quote Originally Posted by Vivek View Post
    Which one have you got? There is more than one Fujinon-TV 25/1.4 lens in c-mount.

    One does not vignette to the extent you say it does and that one is-

    Fujinon-TV CF25B 25mm f/1.4.
    I have Fujinon-TV CF25B 25mm f/1.4 and I bought this adapter ->
    http://cgi.ebay.com/ws/eBayISAPI.dll...ht_2179wt_1200
    With 37.2 MM max inner diameter.

    My camera cannot focus to infinite, Is there any adapter that I can use with this lens without modification?

  18. #18
    eugenecctan
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    Re: CZJ Tevidon versus Fujinon CCTV

    Any c-mount adapter that suitable for Fujinon-TV CF25B 25mm f/1.4 lens without modification needed?

  19. #19
    Senior Member RichA's Avatar
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    Re: CZJ Tevidon versus Fujinon CCTV

    Quote Originally Posted by MelanieC View Post
    Ah, OK. Sorry, I didn't see your reply right above mine. Thanks for the info. At least I didn't have to file mine down to make it fit!
    Soft (shading) vignetting is not so bad, and can even be compensated for. But hard vignetting (where the image is literally cut-off) is insurmountable.

  20. #20
    Senior Member RichA's Avatar
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    Re: CZJ Tevidon versus Fujinon CCTV

    Quote Originally Posted by eugenecctan View Post
    Any c-mount adapter that suitable for Fujinon-TV CF25B 25mm f/1.4 lens without modification needed?
    For mine, I had to remove the rear retaining ring to get it to seat in the adapter for infinity focus. Since the retaining ring holds the aperture ring on the lens, I replaced the wide retaining ring with a narrower plastic ring that I cemented on the edge of the metal c-mount. This holds the aperture ring, but allows it to turn smoothly.
    Cutting the plastic ring (I did it out of an old plastic film cannister) isn't critical since the metal c-mount provides the rim that bottoms out on the adapter. For a fancier set-up, a metal ring with set screws and a teflon or nylon washer would allow the same thing.


  21. #21
    eugenecctan
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    Re: CZJ Tevidon versus Fujinon CCTV

    Quote Originally Posted by RichA View Post
    For mine, I had to remove the rear retaining ring to get it to seat in the adapter for infinity focus. Since the retaining ring holds the aperture ring on the lens, I replaced the wide retaining ring with a narrower plastic ring that I cemented on the edge of the metal c-mount. This holds the aperture ring, but allows it to turn smoothly.
    Cutting the plastic ring (I did it out of an old plastic film cannister) isn't critical since the metal c-mount provides the rim that bottoms out on the adapter. For a fancier set-up, a metal ring with set screws and a teflon or nylon washer would allow the same thing.

    IMPRESSIVE!! May I know how did you remove the rear retaining ring?

  22. #22
    eugenecctan
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    Re: CZJ Tevidon versus Fujinon CCTV

    IMPRESSIVE!!! How did you remove the rear retaining ring?

  23. #23
    eugenecctan
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    Re: CZJ Tevidon versus Fujinon CCTV

    I am very impress with Fujion CF25B, it gives me full coverage with no vignetting problem. I am still working hard now to modify the lens so that it can focus infinity.

  24. #24
    Senior Member RichA's Avatar
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    Re: CZJ Tevidon versus Fujinon CCTV

    Quote Originally Posted by eugenecctan View Post
    IMPRESSIVE!!! How did you remove the rear retaining ring?
    It's actually just a couple of set-screws. Unlike this older Pentax Cosmicar 12.5mm f1.9 which needs no mods to fit. I found this one attached to an old vidicon CCTV camera hanging (no longer working) in a store and I asked the owner if I could buy it.


  25. #25
    eugenecctan
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    Re: CZJ Tevidon versus Fujinon CCTV

    Quote Originally Posted by eugenecctan View Post
    IMPRESSIVE!!! How did you remove the rear retaining ring?
    Quote Originally Posted by RichA View Post
    It's actually just a couple of set-screws. Unlike this older Pentax Cosmicar 12.5mm f1.9 which needs no mods to fit. I found this one attached to an old vidicon CCTV camera hanging (no longer working) in a store and I asked the owner if I could buy it.

    May I know what size/ what kind of screwdriver do I need? and where can I get it? I will try to get it from Walmart/Home depot tonight. Appreciate if I can have some clear direction to speed up the modification process.

    <<I replaced the wide retaining ring with a narrower plastic ring>>
    How did you manage to find a suitable plastic ring? Envy..

  26. #26
    eugenecctan
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    Re: CZJ Tevidon versus Fujinon CCTV

    Fujion lens Testing, Currently I am only manage to get it on focus within 1 meter distance.

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    Re: CZJ Tevidon versus Fujinon CCTV

    I'm not sure this applies but FWIW my Fujinon 35mm would not focus to infinity when first attached to the metabones adapter. I had loosen the 3 small screws on the barrel and readjust. It was a trail and error process until I got it right. After the first try the lens actual focused beyond infinity. It took several trials to get it right.

  28. #28
    Senior Member RichA's Avatar
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    Re: CZJ Tevidon versus Fujinon CCTV

    Quote Originally Posted by turbines View Post
    I'm not sure this applies but FWIW my Fujinon 35mm would not focus to infinity when first attached to the metabones adapter. I had loosen the 3 small screws on the barrel and readjust. It was a trail and error process until I got it right. After the first try the lens actual focused beyond infinity. It took several trials to get it right.
    Yes, it's a bit of a pain when it goes past infinity. Some very long lenses do that, to accomodate the barrel length change with temperature that can effect focus.

  29. #29
    Senior Member RichA's Avatar
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    Re: CZJ Tevidon versus Fujinon CCTV

    Quote Originally Posted by eugenecctan View Post
    Fujion lens Testing, Currently I am only manage to get it on focus within 1 meter distance.
    The rear element should be removable with a fine, flat jeweller's screw-driver. Then you can replace it with a smaller ring.

  30. #30
    Senior Member RichA's Avatar
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    Re: CZJ Tevidon versus Fujinon CCTV

    Quote Originally Posted by eugenecctan View Post
    May I know what size/ what kind of screwdriver do I need? and where can I get it? I will try to get it from Walmart/Home depot tonight. Appreciate if I can have some clear direction to speed up the modification process.

    <<I replaced the wide retaining ring with a narrower plastic ring>>
    How did you manage to find a suitable plastic ring? Envy..
    Flat jeweller's screw-driver with a blade about 0.5mm wide. You can buy sets of these things for about $5.00. You loosen the retaining ring screws that are on the sides of the rear ring. The ring then just lifts off. Make sure the lens is lens side down. You then need to have a narrow (narrower than the width of the depression in the adapter, about 36mm, no wider. I used the open end of a black plastic film can because it just matched the diameter of the ring below the threads of the c-mount on the lens. I cut the end of the film cannister off just to the height of the rim on the lens, just below the threaded c-mount. Then I glued it in-place but I was careful to only apply adhesive to the wall of the rim on the lens below the threaded mount. The reason for this is that you want the aperture ring of the lens to be snug against the plastic of the film cannister, but not to bind it and not to be glued to it because the aperture ring still has to turn. If you cut the plastic ring to just the height of the lip of the lens mount rim (Just below the threads, see the other image of the lens in this thread) then when you attach the adapter to the lens, it will just touch it, forming a good mate. If you cut the thickness just right so there is some minor compression between it and the adapter, you don't even need to glue it because the adapter becomes the retainer. I leave the adapter on that lens (you can buy them for about $9.00 now) and if I need to use an adapter for another c-mount lens, I use a different adapter. Having said this, if someone can machine you a thick aluminum ring with set-screws in it, you can use thin piece of teflon cut into a washer between the aluminum ring and the aperture ring and it will provide a very nice, smooth fit.

  31. #31
    eugenecctan
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    Re: CZJ Tevidon versus Fujinon CCTV

    Quote Originally Posted by RichA View Post
    Flat jeweller's screw-driver with a blade about 0.5mm wide. You can buy sets of these things for about $5.00. You loosen the retaining ring screws that are on the sides of the rear ring. The ring then just lifts off. Make sure the lens is lens side down. You then need to have a narrow (narrower than the width of the depression in the adapter, about 36mm, no wider. I used the open end of a black plastic film can because it just matched the diameter of the ring below the threads of the c-mount on the lens. I cut the end of the film cannister off just to the height of the rim on the lens, just below the threaded c-mount. Then I glued it in-place but I was careful to only apply adhesive to the wall of the rim on the lens below the threaded mount. The reason for this is that you want the aperture ring of the lens to be snug against the plastic of the film cannister, but not to bind it and not to be glued to it because the aperture ring still has to turn. If you cut the plastic ring to just the height of the lip of the lens mount rim (Just below the threads, see the other image of the lens in this thread) then when you attach the adapter to the lens, it will just touch it, forming a good mate. If you cut the thickness just right so there is some minor compression between it and the adapter, you don't even need to glue it because the adapter becomes the retainer. I leave the adapter on that lens (you can buy them for about $9.00 now) and if I need to use an adapter for another c-mount lens, I use a different adapter. Having said this, if someone can machine you a thick aluminum ring with set-screws in it, you can use thin piece of teflon cut into a washer between the aluminum ring and the aperture ring and it will provide a very nice, smooth fit.
    Thanks a lot for the priceless information, can you please attach here with the photo for the bottom of the lens after connected to c-mount adapter? I want to know how deep the lens have to screw in the adapter to focus infinity and without damaging camera sensor.

  32. #32
    Senior Member RichA's Avatar
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    Re: CZJ Tevidon versus Fujinon CCTV

    Quote Originally Posted by eugenecctan View Post
    Thanks a lot for the priceless information, can you please attach here with the photo for the bottom of the lens after connected to c-mount adapter? I want to know how deep the lens have to screw in the adapter to focus infinity and without damaging camera sensor.
    The lens has to bottom out in the adapter to reach infinity focus. All these c-mount lenses have the same focusing distance so they all must seat in the adapter properly. There is a rim on the lens, which meets the top of the threaded part. That rim must sit in the bottom of the adapter. If it is above the bottom part of the adapter because you can't screw the lens all the way into the adapter, because the back of the lens is too wide, it will not reach infinity focus.
    No lens part is likely to reach the sensor, it is much deeper in the camera than the bottom of any lens will likely reach.

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    Re: CZJ Tevidon versus Fujinon CCTV

    Quote Originally Posted by Amin View Post
    Looking at the close edge of the table, the CZJ shows more barrel distortion. The CZJ bokeh also looks smoother to me (disregarding the OOF highlights).
    I am really glad I got the fujinon lens. I now have the Pentax 25mm f1.4 but the fujinon I feel is slightly better. I also have the nokton 25mm 0.95 but when I want something tiny then the fujinon will be the goto lens. You lose one stop but its pretty sharp wide open so you can use it at f1.4 no worries provided subjects are in the center sweet spot.

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