Does anyone recognize this screen?

I have an extra-bright Sinar 4x5 focusing screen that I've always understood to be from Bill Maxwell. Another forum member has told me that he doesn't think it's a Maxwell screen because all of Bill Maxwell's large format screens are made entirely of plastic, and this one is glass with a thin plastic secondary layer.

Does anyone recognize this screen?

Thanks,

Jonathan


Attachment 100976

I'd need to check but my Wista screen looks similar, it's a combo screen/fresnel with the grid lines on the cack an a thin plastic protector.

Second thoughts after checking the Wista it's not similar, I had a Cambo camera and also a rotating Cmbo back and they used plain GG screens with a plastic fresnel overlay and they were as bright as my Wista

Ian

There was a European (probably Dutch or Belgian) maker with sandwiched screens that had a wax layer in between. Haven't got mine any more (a studio lamp too close to the camera killed it - apparently a common issue), but it had a similar grid pattern with marks for a Sinar Zoom holder (however, IIRC no circle at the centre position).

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Originally Posted by Sevo

There was a European (probably Dutch or Belgian) maker with sandwiched screens that had a wax layer in between. Haven't got mine any more (a studio lamp too close to the camera killed it - apparently a common issue), but it had a similar grid pattern with marks for a Sinar Zoom holder (however, IIRC no circle at the centre position).

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Dutch, the Boss screen. They were camera brand specific in order to place the parrafin layer on the film plane.

I don't think it could be a Bosscreen, as it functions properly and is nice and bright without any wax between the glass and plastic pieces.

Can a Bosscreen be used without the paraffin layer?

Is it true that all of Bill Maxwell's large format screens of the last twenty years were made entirely of plastic? I ask because it was on a Sinar that was purchased new in 1992.

Quote:

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Originally Posted by Jonathan Barlow

I don't think it could be a Bosscreen, as it functions properly and is nice and bright without any wax between the glass and plastic pieces.

Can a Bosscreen be used without the paraffin layer?

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No, both panes would be transparent. And Bosscreens had the main glass pane to the rear - the plastics (acrylic?) one was facing the lens.

Jonathan, we met in Aspendell several years back near bishop creek. "Hey, a guy with a real camera"
How's it going?

Quote:

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Originally Posted by Jonathan Barlow

I don't think it could be a Bosscreen, as it functions properly and is nice and bright without any wax between the glass and plastic pieces.

Can a Bosscreen be used without the paraffin layer?

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No, the parrafin is what formed the image.

This focusing screen is glass with the grid and other markings on the back, with a slightly thinner plastic Fresnel behind it. Kind of like a Canham focusing screen, except that both pieces are plastic with a Canham screen.