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Cirkut Gear Selector

2/4/2021

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There seem to be continuing online questions about how to select the correct gears for Cirkut cameras, depending on focal length and focal distance.
​By inspecting the scales on the bed of my Cirkut #8, I find that there is a simple straight-line logarithmic chart for each distance and all focal lengths.
Picture
Note that the x-axis scale is logarithmic and the y-axis is linear. However there is no need to worry about any of that. Choose your lens focal length (in inches) along the x-axis, then the y-axis shows the tooth count of the required gear at 25, 50 or 100 ft. I guess infinity uses the 100 ft setting. A larger PDF version is downloadable from the link below.
It would be a useful exercise to check the data for other Cirkut models, but I don't have those so leave it to others - who may hopefully to publish the results!
cirkut_8_gear_chart.pdf
File Size: 766 kb
File Type: pdf
Download File

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  • Home
  • Reflected
  • Gallery 1
  • Gallery 2
  • Techniques
    • Nikon D70 Macro
    • Rodenstock Imagon
    • Budget Fisheye
    • Slit Scanning
  • PhotoHistory
    • Mizuno
    • 35TLR
  • Restoration
    • Fotochrome
    • Gami-16
    • Graphic 35
    • Karma-Flex
    • Kirk Stereo
    • Komaflex-S
    • Leatherwork
    • Lens Caps
    • Megoflex
    • QRS Kamra
    • Walz Automat
    • Watkins Darkroom Clock
  • Harmonograph
  • Fractals
  • Contact