CSA2-V Series 2 Inch Visible Tube Lens Tube SM2 Lens Tube Coaxial Optical Lens Shading Tube Experiment

    Product information   Model CSA2-40V CSA2-50V CSA2-60V Specification Ø59.7*43.8mm Ø59.7*53.8mm Ø59.7*63.8mm Tube Height 40mm 50mm 60mm Thread Type SM2 (2.035"-40) Internal and External Thread Weight 60.1g 69.0g 79.8g Material 7075 Aluminum Alloy   Optical commonly used thread size standard   This is the unique thread of Thorlabs in the United States, not the commonly used optical thread. SM is the code for the thread of the sewing machine in terms of thread expression, but this company in the United States uses it to connect the internal and external threads of the optical lens and the sleeve. The nature of the thread is UNS, and the United States has a special thread with a tolerance accuracy of 2A / 2B. The special place of this thread is 40 teeth per inch regardless of the diameter. The specific dimensions are as follows:   Characteristic   ►Convenient and easy to operate optical components, can be operated without disa