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Thread: Mamiya, Pentax 645 to 4x5 adapter

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    Mamiya, Pentax 645 to 4x5 adapter

    Anyone familiar with these adapters? Made in versions to adapt Mamiya or Pentax to 4x5 view. I thought of trying to make something like this myself but decided I really don't have the skills.

    Moveable 4x5 Large Format to Mamiya 645 Camera Adapter | eBay

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    Workshop Member lance_schad's Avatar
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    Re: Mamiya, Pentax 645 to 4x5 adapter

    I have had a few clients purchase widepan adapters for their graflock 4x5's.
    Haven't heard any complaints.

    Lance
    LANCE SCHAD - Digital Transitions - Phase One,Mamiya | Leaf,Arca-Swiss,Cambo, Profoto
    direct/cell:610-496-5586 office:877-367-8537x224
    http://www.digitaltransitions.com email:[email protected]

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    Re: Mamiya, Pentax 645 to 4x5 adapter

    One problem with this type of adapter used on the back of a 4x5 is that the
    throat in front of the sensor becomes quite deep limiting the amount of lens movements you can use before you get vignetting from the adapter and mirror box of the body getting in the way.

    It's better to use a system that replaces the rear standard of the 4x5 camera.

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    Re: Mamiya, Pentax 645 to 4x5 adapter

    They can work but a right royal PITA to be honest. You can only use with lenses with a flange length longer than the camera lens box + distance of the adapter + min extension of your camera. Maybe with a mamiya you need less stitches, so better than the small format ones I tried

    The price has dropped a lot though.

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    Re: Mamiya, Pentax 645 to 4x5 adapter

    If you have a Mamiya with a digital back then it would be better to fit the back directly onto your 4x5, wither with a Graflok adapter or a sliding back. This is providing that you have Copal-type shutters so that you don't need to body's focal plane shutter

    I've made a DIY adapter one for testing the 645DF on the back of a microscope (x60 lenses with no shutters). I used a Graflok plate and a plastic body cap, worked fine...

    BR, Yair
    Yair Shahar | Product Manager | Phase One | Mamiya Leaf
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    Re: Mamiya, Pentax 645 to 4x5 adapter

    Tom, you need to learn to use Yahoo Japan. You would most likely need focal length of 150mm of more. Here is the unit on a camera:

    ペンタックス645D用4x5AD撮影テスト - 大判カメラ日*。

    And another:

    ペンタックス645D用4x5AD撮影テスト(5) - 大判カメラ日*。

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    Re: Mamiya, Pentax 645 to 4x5 adapter

    I had the camerafusion adaptor for my canon for use with LF. The mirror box shading is a serious problem. The results were incredible but forget trying to use it without proper LV for focusing and so you can see the shading problems and work round them.
    I am not a painter, nor an artist. Therefore I can see straight, and that may be my undoing. - Alfred Stieglitz

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    Re: Mamiya, Pentax 645 to 4x5 adapter

    Thank you all for the replies. I might try the adapter on an old Toyo with a 150mm Rodenstock just to have tilt. Shashin: I spend too much time on the internet as it is.

    Tom
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