T2 extension tube with 21 mm length for optimal working distance.
ZWO M42 TO M42 21mm EXTENSION
SKU: ZWO-T2-EXT-21
€29.00Price
Out of Stock
Description
Additional Information
T2 extension tube with 21 mm length for optimal working distance.
Example of use:
In this example the aim is to reach 55mm with an OAG: attach the 21mm extender to ASI071 to reach 55mm back focus distance:17.5mm+21mm+16.5mm=55mm
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