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The Kodak Retina Close-Up Lens Set, Type R, consists of three 32mm glass lenses (R 1:2/32, R 1:3/32, R 1:4.5/32) for specific Kodak Retina cameras (like IIa, IIC, IIIC, IS, Reflex models) that allow for extreme close-up photography, enabling focus from about 14 inches down to 5.5 inches, used individually or combined to achieve magnification scales from 1:4.5 to 1:1.5 for detailed shots of small subjects.
Usage Notes
- For rangefinder cameras (e.g., Retina IIC, IIIC), the lenses are generally used in connection with a separate close-up attachment which helps correct for parallax error.
- For Retina Reflex and Reflex S SLR cameras, the close-up attachment is not strictly required because SLR cameras have through-the-lens viewing, eliminating parallax issues.
- When using the lenses, the aperture must be stopped down to at least f/8 for the R 1:4.5 and R 1:3 lenses, and to not less than f/11 for the R 1:2 and combined lenses, to ensure adequate depth of field and sharpness