ZWO T2-T2 Extender - 11mm - T2-T2-11 type-cameras-and-imaging-accessories 45mm for 36

45mm for 36

a counterweight

While this may be acceptable for visual observing

This 4-element system provides the magnifying function of a Barlow lens without its limitations by restoring the field rays back to their original direction

ZWO T2-T2 Extender - 11mm - T2-T2-11 type-cameras-and-imaging-accessories 45mm for 36The ZWO T2 11mm Extension has M42*075 female to female threads and is useful to obtain precise distancing when using a focal reducer or corrector that needs a particular chip reducer spacing to reach the proper focus. This 11 mm T2 Extender is compatible with the ASI1600mm, ASI1600MC, ASI1600MM C or ASI1600MC C camera but will work in any optical chain where a T2 to T2 adapter with 11 mm of back focus is required.