Focus Adjuster

Non-rotating length adjustment with 8 mm travel and 30 mm aperture. 

Female RING mounts on both sides. 41 mm length +/- 4 mm. 

It can be combined with C60-RING-30 mm and C60-RING-C-MALE 

to make an adjustable C-mount adapter with 8 mm of travel, 

which is useful for bringing multiple cameras into co-focus.

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