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| Left lens: Graf Variable 8.5-9.5" f/3.8-f/4.5 |
This lens can function as a sharp anastigmat lens working at f3.8 maximum or a diffusion lens working at f4.5 maximum. The adjustment from sharp to diffused focus is by turning a calibrated control ring at the front of the barrel, moving the front cell in or out about ¼”. When it is out, the lens is a sharp f/3.8 – when it is in, the lens is a soft focus f/4.5, and the amount of rotation controls the diffusion. The lens is calibrated with two scales of f stops – one each for sharp and soft focus, and will cover a 5"x7" format. This lens works best with stitching on the CameraFusion sliding back.
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| sharp setting, wide open aperture |
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| soft setting, wide open aperture |
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| medium soft setting, f/5.6 aperture |
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| full soft setting, wide open aperture |
I have two Graf Variables in my collection: the 8.5-9.5" shown above, and a smaller 7.5-8.5" lens which I use with a helical focus unit. They deserve to be used more.
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