Made with standard M54x0.75 thread, inner diameter 54mm, outer diameter 62mm. Package includes 0.5mm and 1.0mm two precision metal spacers.
Two sizes can be used separately or stacked together for 1.5mm total thickness to adjust flange distance and correct infinity focus for lens modification.
Precision machined solid metal, sturdy and not easy to deform, stable for long-term installation.
Fits well for M54 threaded telescope eyepieces, camera adapters and astronomical accessories for back focus calibration.
Compact lightweight spacer set, easy to store and carry, essential accessory for astronomy and astrophotography lovers.
وصف
Specifications
Thread: M54 × 0.75
Inner Diameter (ID): 54mm
Outer Diameter (OD): 62mm
Set Thickness: 0.5mm and 1.0mm (1 piece each)
Material: Precision Metal