Extension rings are required if the minimum focal distance of a lens needs to be reduced. They are available in a range of thicknesses and can be combined to produce almost any desired extension. The usefulness of a set of extension rings cannot be overstated, as they allow the parameters of almost any lens to be simply and easily altered.
Pentax Ricoh extension rings are suitable for all C-mount and cs-mount lenses from Pentax Ricoh, Tamron and many other manufacturers.
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Extension ring 5 mm, C-Mount
(Adapter for CS-Mount camera to C-Mount)
Extension Ring 10 mm, C-Mount
Extension Ring 20 mm, C-Mount
Extension Ring 40 mm, C-Mount
Extension ring set, C-Mount