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Thread: Looky what I bought!

  1. #1
    Senior Member thrice's Avatar
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    Looky what I bought!

    I know this sub-forum is a little slow paced, but I thought I should share my new toy. Cost me all of $195. Rated 9+ if you ignore the 6mm scratch on the rear element. It's a Zeiss 135/3.5 Planar.

    If my maths isn't flawed, a 135/3.5 on 4x5 is equivalent to a 35/0.9 on 24x36mm (in FOV/DOF of course, not light gathering capability).

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    Super Duper
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    Re: Looky what I bought!

    Quote Originally Posted by thrice View Post
    I know this sub-forum is a little slow paced, but I thought I should share my new toy. Cost me all of $195. Rated 9+ if you ignore the 6mm scratch on the rear element. It's a Zeiss 135/3.5 Planar.

    If my maths isn't flawed, a 135/3.5 on 4x5 is equivalent to a 35/0.9 on 24x36mm (in FOV/DOF of course, not light gathering capability).
    Lovely lens, I hope the rear element scratch doesn't degrade its performance too much (rear element scratches are much more significant than front element scratches, unfortunately).

    I've never run DOF corresponding equivalent numbers between 35mm format and 4x5in format, but yes: 135mm on 4x5 renders approximately the 35mm FOV on 35mm Film format. I used a 135mm lens on my old Speed Graphic quite a lot in High School days, usually with flash and stopped down to f/8 or f/11 or so.

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    Senior Member thrice's Avatar
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    Re: Looky what I bought!

    I had a 90mm APO-Summicron-R with 3 scratches all around 6mm on the rear element. They never affected images in the slightest. I think it depends largely on the angle of incidence the light leaves (or enters) the particular element. I would imagine a similar scratch would be much less evident in large format than 35mm since it is far less affected by diffraction.

    I sincerely doubt (and will eat my hat if I'm wrong) that a 6mm scratch (unless it's 6mm deep) will affect IQ in any measurable way.

    The dealer e-mailed today to say they tested the shutter and it's slightly off at slower speeds so they're going to get it CLA'd for free before sending to me

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    Super Duper
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    Re: Looky what I bought!

    Quote Originally Posted by thrice View Post
    I had a 90mm APO-Summicron-R with 3 scratches all around 6mm on the rear element. They never affected images in the slightest. I think it depends largely on the angle of incidence the light leaves (or enters) the particular element. I would imagine a similar scratch would be much less evident in large format than 35mm since it is far less affected by diffraction.

    I sincerely doubt (and will eat my hat if I'm wrong) that a 6mm scratch (unless it's 6mm deep) will affect IQ in any measurable way.

    The dealer e-mailed today to say they tested the shutter and it's slightly off at slower speeds so they're going to get it CLA'd for free before sending to me
    I hope you find that to be true. Remember your 90mm lens was a telephoto on its format, this is a wide on its format. It makes a difference.

    It does sound like the vendor is being accommodating!

  5. #5
    jamie123
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    Re: Looky what I bought!

    Quote Originally Posted by thrice View Post
    If my maths isn't flawed, a 135/3.5 on 4x5 is equivalent to a 35/0.9 on 24x36mm (in FOV/DOF of course, not light gathering capability).
    Not exactly. A 135mm lens has the DoF of a 135mm lens. As for the FoV, I have compared the FoV of my 135mm lens with a zoom lens on my Canon SLR and the 135mm lens on 4x5 seems to have the same FoV as the Canon lens at 35mm IF you crop the latter to 4x5 aspect ratio. So it basically matches the 35mm focal length on the short side but on the long side it's more like 40mm. Hope that makes sense.

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    Re: Looky what I bought!

    Quote Originally Posted by jamie123 View Post
    Not exactly. A 135mm lens has the DoF of a 135mm lens. As for the FoV, I have compared the FoV of my 135mm lens with a zoom lens on my Canon SLR and the 135mm lens on 4x5 seems to have the same FoV as the Canon lens at 35mm IF you crop the latter to 4x5 aspect ratio. So it basically matches the 35mm focal length on the short side but on the long side it's more like 40mm. Hope that makes sense.

    Query Results

    You submitted the following name/value pairs:
    focal = 35
    format = 24 x 36
    Width = 24 mm, Length = 36 mm, Diagonal = 43.2666 mm
    **f *Hor * * * Vert * * *Diag * * * H/V *
    *35.0 54.4322 * 37.8493 * 63.4400 * *1.4381

    Subject distance 10 ft
    *
    Depth of field @ f/1
    Near limit 9.31 ft
    Far limit 10.8 ft
    Total 1.48 ft
    *
    In front of subject 0.69 ft (46%)
    Behind subject 0.8 ft (54%)
    *
    Hyperfocal distance 134.1 ft


    Query Results

    You submitted the following name/value pairs:
    focal = 135
    format = 101.6 x 127
    Width = 101.6 mm, Length = 127 mm, Diagonal = 162.639 mm
    **f *Hor * * * Vert * * *Diag * * * H/V *
    135.0 50.3818 * 41.2423 * 62.1268 * *1.2216

    Subject distance 10 ft
    *
    Depth of field @ f/3.5
    Near limit 9.49 ft
    Far limit 10.6 ft
    Total 1.08 ft
    *
    In front of subject 0.51 ft (47%)
    Behind subject 0.57 ft (53%)
    *
    Hyperfocal distance 178.2 ft



    Numbers from Rui's FoV calculator and DOFMaster.
    Not exact, but pretty close. :-)

  7. #7
    Senior Member thrice's Avatar
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    Re: Looky what I bought!

    Gosh it arrived a little uglier than expected, scratches on front and rear elements and fungus inside and on the shutter!

    I have fully disassembled and cleaned all lens surfaces and the shutter blades, looks very sexy now provided light on the front element isn't too bright

    Anyone have any advice on how to mount filters on this thing? It has threads quite deep inside the front barrel which I assume are 58mm but I can't get a B+W 58mm filter in there. my current theory is a 62-67 step-up and some rubber bands.

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    Re: Looky what I bought!

    Get a same size Hoya filter and remove the glass. Put any filter on top of it. With this, you can still use a hood which is quite important with this lens.

  9. #9
    Senior Member thrice's Avatar
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    Re: Looky what I bought!

    I have a 62-67 step up on it's way along with the new Nano-coated B+W which no doubt will go to a more diffraction limited lens, but at least I get the good filter.

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