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Marshall's V-5000 0.020" Aluminum Extender Washer (Black) is an anodized washer used with or without Extension Tubes to adjust the focus on any CCTV system using a 0.5" (1.27 cm) C Mount Camera. They are especially valued in laboratories and test/measurement applications, where the subject is very close to the lens.
Extenders move your lens away from the sensor to improve clarity (or get closer to the working surface in video microscopes). Use Extension Tubes for large focus adjustments, and add individual Extender Washers to fine tune magnification.
Marshall's full line of lens extenders include:
V-4995XK 5 Piece 38mm Kit of C Mount Extension Tubes
V-4996X 5mm C/CS Mount Adapter Ring
V-4997X 74mm C Mount Extension Tube
V-4998X 22mm C Mount Extension Tube
V-4999X 10mm C Mount Extension Tube
V-5000 0.020" Extender Washer
V-5001 0.040" Extender Washer
V-MC Adapter Ring for Microscope Lens
Bring Objects into Sharper Focus
When you need to fine tune your CCTV camera or microscope, use individual Extender Washers to adjust magnification.
Any of Marshall's Extenders can be added in series to incrementally adjust the focus. Use as much or as little extension as you need.
0.5" (1.27 cm) C Mount Cameras by any manufacturer