M42 Lens Adapter.

One of the problems with current DV cameras is the lack of Depth of Field (DOF). Put very simply, if you want to have a foreground object in focus, and a background blurred, you need a large sensor and a large aperture, neither of which are available on a tiny video camera. Of course, there is a hack, and that hack is to make a 35mm lens adapter.

For lenses, I chose to use the “M42” mount, which allows me to use some lenses that I acquired while in Russia. To make the thing work, you use the 35mm lens as it was intended to be used — projecting onto a piece of film, or in this case, ground glass. Actually, in my design, I used a diffusing film from an LCD monitor instead of ground glass, but the effect is the same. Finally, you tape the image of the projection using your small sensor and aperture, and get a much more pleasing image.

For the moment, this is just a set of three images of the device. As time permits, I may write up a tutorial and a discussion of LCD film technology.

Don’t miss my show at the Plains Art Museum. Thanks to everyone who has gone, and especially to those who have provided feedback.

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