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Thread: TT&H Cooke lens

  1. #1

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    TT&H Cooke lens

    I gotten a TT&H Cooke lens ,But not able to clarify it as to which it is:
    since on Seth's site I find the mention of a TT&H Cooke lens for 5" 6" and 7"
    But can not find any thing on a 61/2 inch Cooke F-4.5 lens There are references to series II lens
    one is on the page 11 on the following site http://www.cameraeccentric.com/html/info/cooke_1.html
    and then on page 22 of same book. So the question is it a plain Jane or is it
    an Aviar unmarked ? will be able to supply photo's upon receipt of the lens:
    thank for your time and information

    Have tried the Cooke web site for information
    Last edited by seawolf66; 3-May-2012 at 05:16. Reason: info correctin
    Lauren MacIntosh

    Whats in back of you is the past and whats in front of you is the future now in the middle you have choices to make for yourself:

  2. #2
    IanG's Avatar
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    Re: TT&H Cooke lens

    Some TTH Cooke lenses were made for specific camera manufacturers like Thornton Pickard and so are not listed in the TTH Adverts/Catalogues etc. In addition some of these Cooke lenses were older triplet designs while lenses of the same name sold seperately were 4 or more elements.

    There was a Series IIa f3.5 6.5" it's listed in a 1921 advert in front of me.

    Ian

  3. #3

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    Re: TT&H Cooke lens

    pictures are worth a 1000 words.....
    My YouTube Channel has many interesting videos on Soft Focus Lenses and Wood Cameras. Check it out.

    My YouTube videos
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  4. #4

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    Re: TT&H Cooke lens

    A triplet has three bits of glass and two air spaces, an Aviar has four bits of glass and three air spaces. Count the number of strong reflections and Bob's yer uncle.

    Actually, it can be hard to be sure you haven't missed a reflection. One solution is to use a laser pointer, which works *much* better than a lamp or spotlight. Another is to see if the lens is symmetric front and back. Aviars are, Cooke triplets are not - one of the 'problems' with a triplet is that the perfect design can end up wanting the aperture iris in the middle of the centre element.

  5. #5

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    Re: TT&H Cooke lens

    Eddie: As soon as I have it , I will post a photo or two Here: Lauren


    Quote Originally Posted by eddie View Post
    pictures are worth a 1000 words.....
    Lauren MacIntosh

    Whats in back of you is the past and whats in front of you is the future now in the middle you have choices to make for yourself:

  6. #6

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    Re: TT&H Cooke lens

    Click image for larger version. 

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ID:	73161Eddie here are some photos of it,
    Its a TT&H cooke 6-1/2inch -at F-4.5 the rear elements are marked with the same number's a F.L.
    the brass ring has TT&H on it: the rear element does unscrew from the body and the front does not
    the retaining ring in the lens has the same number written in pencil on it: Also came with front and rear caps : that fit tight

    Quote Originally Posted by eddie View Post
    pictures are worth a 1000 words.....
    Lauren MacIntosh

    Whats in back of you is the past and whats in front of you is the future now in the middle you have choices to make for yourself:

  7. #7

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    Re: TT&H Cooke lens

    Looks like an Aviar from the size of the rear barrel. The proof will be in whether the rear section has one element (triplet) or two (Aviar).
    "I love my Verito lens, but I always have to sharpen everything in Photoshop..."

  8. #8

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    Re: TT&H Cooke lens

    I have a little fear of maybe scratching the lens since their very nice and clean and scratch free:
    tried but scratched the brass and non of the two ring's budged on the rear cell:


    Quote Originally Posted by Mark Sawyer View Post
    Looks like an Aviar from the size of the rear barrel. The proof will be in whether the rear section has one element (triplet) or two (Aviar).
    Lauren MacIntosh

    Whats in back of you is the past and whats in front of you is the future now in the middle you have choices to make for yourself:

  9. #9

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    Re: TT&H Cooke lens

    Cooke nomenclature seems very confusing with two series ll lenses at the same time.
    I have an 10.4 inch Series ll anastigmat which is a triplet.
    If you close the aperture down and look at the back with a ceiling light above you, you will see either two reflections of the light (triplet) or 4 reflections (Aviar).
    I am sure others will chime in with a more refined technique.
    It does look like there are two cells on the back
    Bill
    "There are a great many things I am in doubt about at the moment, and I should consider myself favoured if you would kindly enlighten me. Signed, Doubtful, off to Canada." (BJP 1914).

  10. #10

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    Re: TT&H Cooke lens

    PS The whole back may screw out of the shutter, not just the glass. You don't need to take out the retaining ring holding the glass in the brass sleeve cell. ( if I have interpreted your scratch comment correctly)
    Bill
    "There are a great many things I am in doubt about at the moment, and I should consider myself favoured if you would kindly enlighten me. Signed, Doubtful, off to Canada." (BJP 1914).

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