50mm – 90mm Length, C-Mount Fine Focus Tube

Product Details Finely Threaded Internal Barrel for Fine Focus Adjustments Inner Diameter Baffle Thread for Stray Light Reduction Knurled Lip on Female End for Controlled Adjustments TECHSPEC C, S, and T-Mount Fine Thread Focus Tubes are used for making precision adjustments to optical element positions within a system. These tubes feature an outer barrel with male C, S, or T-Mount thread at the base end and a finely threaded interior barrel to allow for fine focusing. The secondary barrel has a female S, C, or T-Mount thread, knurled ring at the front end for easy adjustment, and a threaded interior for light baffle. Set screws can be used to fix the extension position. TECHSPEC C, S, and T-Mount Fine Thread Focus Tubes offer different extension length options to meet specific application demands. Note: Compatible Allen wrenches for C, S, and T-Mount Fine Thread Focus Tubes ( #56-271 , #55-452 , and #58-637 , respectively) sold separately. Specifications General Type: Fine Focus Tube Function: Extension Tube (Adjustable) Physical & Mechanical Properties Extension Length (mm): 50.0 – 90.0 Clear Aperture CA (mm): 18.0 Outer Diameter (mm): 30.0 Inner Diameter (mm): 18.0 Threading & Mounting Thread Type: C-Mount Barrel Thread: M18 x 0.5 Regulatory Compliance RoHS 2015: Compliant × Certificate of Conformance: View × Reach 235: Compliant ×