Thread: Canon FD vs K35

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  1. #31  
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    Quote Originally Posted by Jacek Zakowicz View Post
    It looks like the K35 85mm lens has the very common Thorium element "browning/yellowing" issue- hence the color shift. Almost like putting 81/85 orange filter. The FD apparently does not have this problem and it is faster and more neutral as the result- that's what we are seeing- This is definitely not intentional on the 85mm K35- this is a flaw in the glass related to the age of the glass. If you look through the K35 at a white card it would appear beige/brown tinted- make no mistake- not a good thing. I think the FD would be a better choice optically- if nothing else to get more light through it and easier color correction/coloring on the more neutral image...
    BTW I also see this issue on the 35mm K35s and sometimes the 55mm

    I have a couple of FL lenses (85 f1.8 and a 58 f1.2) and they have a strong warm colour on the rear element. Do you know if there is a way of fixing this colouring? I thought I had heard of exposing it to UV light , or something like that??

    Cheers Paul
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  2. #32  
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    Quote Originally Posted by Karim D. Ghantous View Post
    I don't suppose you are willing to say how much you paid for that set?
    Thanks!! The official price for the set seems to be $40,740 - not sure what the price would be if you supply your own glass or if you'd upgrade from older GL rehouses.

    http://www.glcinemod.com/
    https://cinemaglass.com/product/g-l-...intage-fd-set/

    Cheers!
    __________________________________________________ _____________________________
    timsessler.com & brooklynaerials.com | RED Monstro 8K VV
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  3. #33  
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    Recommend trying a strong UV lamp (with protective eye covering over the unit and a cooling fan) to try to activate thoriated elements. Nail UV curing stations with full on time setting can possibly be a good choice.
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  4. #34  
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    I have tried several times with several different uv lights for days at the time. Never made any significant difference on any Cooke or k35 lens . I concluded this UV 'miracle cure ' is just another urban legend... Sorry to be a bearer of bad news...
    Jacek Zakowicz, Optitek-dot-org, jacek2@optitek.org
    Professional Broadcast and Digital Cinema Equipment
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  5. #35  
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    I’ve had success with a cooke 50mm.

    Went from brown to lightish yellow.

    So not a “cure” for me per se, but an improvement. Did I take a spectrometer reading ? No - but I should have done it for better science.
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  6. #36  
    Senior Member Jacek Zakowicz's Avatar
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    I thought the change was so minor, if any, that made it insignificant. But then again- I'm not in the business of selling "hope in the bottle" ;-)
    Jacek Zakowicz, Optitek-dot-org, jacek2@optitek.org
    Professional Broadcast and Digital Cinema Equipment
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  7. #37  
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    In my experience, UV light on lenses is more for treating fungus on internal elements.

    It won't get rid of it, but it can sometimes stop the fungus growing any further.
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  8. #38  
    Just got a mail. from Eastern Enterprises. My set is in the owen and I also get the replaced iris on these I guess something similar in that regard as to what GL does. Will have:

    Previously rehoused by Zero. FD 14mm that now will get a better housing and will be opened up the front hood to cover Monstro without any vingenting.
    FD 24mm f/1.4 S.S.C.
    FD 35mm
    FD 55mm
    FD 85mm 1.2L
    FD 100mm
    FD 135mm f2
    FD 180mm An old NIKKOR BNC-R superspeed, that I PL mounted my self long ago. This one will be completely rebuilt will get reversed focus better PL mount and same housing as the rest. I added it in there as its a really nice lens for the given focal length.

    Also asked to get them all, except the 14mm, with front threads for screw on filters.

    Been waiting I think soon 3 years for these so cant wait to get them and I hope my wife does not kill me when they get here... :)
    Björn Benckert
    Creative Lead & Founder Syndicate Entertainment AB
    +46855524900 www.syndicate.se
    Flame / VFX / Motion capture / Monstro
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  9. #39  
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    That looks interesting!
    Whats the 18mm 1.5 . that they list under FDs? http://easternenterprises.biz/canon-lenses/

    What fronts are you going with?
    The old MK3 GL Optics FDs were 77mm and even 55 didn't cover VV. The new ones are much larger - they made me some 95mm step-down rings but they will reduce the close focus. I'd definitely be careful with permanent filter threads that might reduce your VV coverage.


    Also the 24mm does not fully cover - I'd say its comparable to the K35. Its a very soft vignette around it. The 14mm surprisingly seems to cover better though.
    This was the coverage of a non-rehoused 24mm FD that Nan at GL Optics shared.



    Cheers!
    Tim
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