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Thread: 150mm Konica Hexanon GRII Process Lens

  1. #1
    Marco Fantin
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    150mm Konica Hexanon GRII Process Lens

    I picked up one of this shutterless beauty on eBay for $8. I glued it to a spare 4x5 lens board to mount it on my 8x10. The lens is so tiny it looks weird on the camera.
    However it covers the format with no problems (not sure of how much room for movements yet - the far corners are showing some softness).

    The lens is uncoated and hazy/fogged up which makes for a very dreamy and "flare-y" atmosphere over an overall very sharp image.

    If you want to see an example of the results--and judge it for your taste--see the video below:



    It was unexpectedly very fun to play with this beat up lens.

    It is a very simple lens so I will open it up and try to clean the haze. Perhaps I will make a follow up video with a test of solvents and procedure to clean up the lens, if it survives!!! Starting from mild solvents going to more and more aggressive ones. I am a chemist so I have access to all sorts of stuff to try and get this lens to its original state.
    My Youtube Channel - Darkroom and large format tutorials

  2. #2
    ic-racer's Avatar
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    Re: 150mm Konica Hexanon GRII Process Lens

    Thanks for sharing. I really like wide lenses on 8x10.
    I had a similar experience with a little wider lens. I got a foggy 125mm to use on 8x10, and after disassembly, was able to clean it up pretty well. Hope you have good luck with your lens also.
    My lens cuts a little off the corners, so when I printed this I enlarged it just past the easel blades to eliminate the dark corners. Resulting angle of view would be about that of a 135mm lens.


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  3. #3

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    Re: 150mm Konica Hexanon GRII Process Lens

    Um, er, ah, I've had three Konica Hexanon GR IIs. 150/9, two 210/9. Still have one of the 210s. All coated. All very sharp. All somewhat flary.

    OP, you're mistaken about y'r treasure's lack of coating.

  4. #4

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    Re: 150mm Konica Hexanon GRII Process Lens

    Nice demo of this small lens. A favorite activity of mine is to put lenses designed for another purpose on the 8x10.
    As an aside, I always told my students to make their exposure, and then turn aroound where they were likely to find an even better image. The tree roots on which you laid your equipment is fascinating.

  5. #5
    Corran's Avatar
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    Re: 150mm Konica Hexanon GRII Process Lens

    I have one of those, and suspected it would cover 8x10 but never tested it. Thanks for the confirmation.

    It came with a 210mm and 300mm. Was testing the longer lenses on ULF. I almost sold the 150mm once but I suppose I'll keep it for now.
    Bryan | Blog | YouTube | Instagram | Portfolio
    All comments and thoughtful critique welcome

  6. #6

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    Re: 150mm Konica Hexanon GRII Process Lens

    I have a 210mm and 260mm both are covering 8x10 easly, the 260mm has almost endless covering power on 8x10. Never see a dark corner!

  7. #7
    Marco Fantin
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    Re: 150mm Konica Hexanon GRII Process Lens

    Quote Originally Posted by Jim Noel View Post
    Nice demo of this small lens. A favorite activity of mine is to put lenses designed for another purpose on the 8x10.
    As an aside, I always told my students to make their exposure, and then turn aroound where they were likely to find an even better image. The tree roots on which you laid your equipment is fascinating.
    Yeah very good point, I saw at least another couple good composition when editing the video!
    My Youtube Channel - Darkroom and large format tutorials

  8. #8
    Marco Fantin
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    Re: 150mm Konica Hexanon GRII Process Lens

    Quote Originally Posted by Dan Fromm View Post
    Um, er, ah, I've had three Konica Hexanon GR IIs. 150/9, two 210/9. Still have one of the 210s. All coated. All very sharp. All somewhat flary.

    OP, you're mistaken about y'r treasure's lack of coating.
    You are right, compared to other glass, the reflections looks the same intensity than my 180mm fujinon single coated, but stronger than multicoated lenses. The reflections are slightly bluish-purple so it must have at least one layer of coating. The glass do not have a strong color tint; this is what threw me off in the first place, I thought it was just plain glass.
    My Youtube Channel - Darkroom and large format tutorials

  9. #9
    Marco Fantin
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    Re: 150mm Konica Hexanon GRII Process Lens

    Quote Originally Posted by ic-racer View Post
    Thanks for sharing. I really like wide lenses on 8x10.
    I had a similar experience with a little wider lens. I got a foggy 125mm to use on 8x10, and after disassembly, was able to clean it up pretty well. Hope you have good luck with your lens also.
    My lens cuts a little off the corners, so when I printed this I enlarged it just past the easel blades to eliminate the dark corners. Resulting angle of view would be about that of a 135mm lens.


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    What solvent did you use for the cleaning? I was thinking to start with simple soapy water and a q-tip.
    My Youtube Channel - Darkroom and large format tutorials

  10. #10
    ic-racer's Avatar
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    Re: 150mm Konica Hexanon GRII Process Lens

    Quote Originally Posted by marcookie View Post
    What solvent did you use for the cleaning? I was thinking to start with simple soapy water and a q-tip.
    I have tried almost everything and concluded haze itself, washes off easily with just about anything. If there is damage to the coating, that is permanent and I think it can sometimes take the form of a fine texture on the coating which does not come off, and it can look like residual 'haze.' At least that is my explanation as more aggressive cleaning almost never works for me.

    So my favorite is Windex and microfiber cloth. Sometimes alcohol (90% isopropyl) if I know it is grease vapor. But still looking for that 'silver bullet' that makes any lens perfect again.

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