Sputnik Lens Hoods

NOTE: when installed, these lens hoods prevent the rotation of the lenses and therefore, the camera cannot be focused when the hood is installed. In my use case this does not present any limitation, as I solely use the camera at f/22 and fix the focus at the hyperfocal distance. The camera then becomes a highly effective “point and shoot” stereo camera that is quick to use. For outdoor photography, optical infinity is almost always present and when optical infinity is present, there is no need to focus in stereo photography, in my opinion. All that is required is to find an interesting stereo composition and to be careful to place the nearest object in the scene at the near point of the hyperfocal range. I have shot hundreds of rolls through my Sputnik with this technique and find it to be wonderfully effective.

This is a pair of lens hoods for the Sputnik stereo camera. The functional aperture is 33.3 mm with 4.7mm diameter corners located approximately 41 mm from the entrance pupil. It is designed primarily for use at f/22, f/16, although the vignetting caused at wider apertures is not much more than the inherent vignetting of the Sputnik's unhooded lenses.

The Fusion 360 file is provided in case you want to make changes. Perhaps one change that may be needed is the lens separation. The parameter named "rim-to-rim" controls this and refers to an outer dimension measured across the "hubs" where the hood press-fits onto. Refer to the image where this dimension is indicated in red. I have personally tested the lens hood on Sputniks with rim-to-rim spacings between 89.9 mm and 90.9 mm which all fit properly with the design dimension set to 90.5 mm, but perhaps it will not fit properly on all Sputniks outside this range.