Astrodymium Fine Adjustment Spacer Rings: For M68 Threads (Set of 12)
This item is discontinued by the manufacturer and is no longer available.
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Please note that this is a 3d printed plastic part.
Astrodymium's # M68-SPACER-RING spacer rings slip over the M68 male thread of an adapter/extension tube and are primarily used for fine tuning backfocus for astrophotography, but they can be used for other purposes as well.
Each set comes with 12 individual spacer rings, with 4 different thicknesses. 3 of each thickness is included: 0.4/0.6/0.8/1.0 mm.
The width of the rings is 3.95 mm, and the inner diameter is 0.5mm larger than the specified size, for good clearance on the threads (They will not get stuck and are easy to insert or remove).
This item is made out of UV resistant PETG plastic and can handle a temperature of up to 70°C (158°F) without deformation.
Other Information
- Country of Manufacture: Canada
Please note that this is a 3d printed plastic part.
Astrodymium's # M68-SPACER-RING spacer rings slip over the M68 male thread of an adapter/extension tube and are primarily used for fine tuning backfocus for astrophotography, but they can be used for other purposes as well.
Each set comes with 12 individual spacer rings, with 4 different thicknesses. 3 of each thickness is included: 0.4/0.6/0.8/1.0 mm.
The width of the rings is 3.95 mm, and the inner diameter is 0.5mm larger than the specified size, for good clearance on the threads (They will not get stuck and are easy to insert or remove).
This item is made out of UV resistant PETG plastic and can handle a temperature of up to 70°C (158°F) without deformation.
Please note that this is a 3d printed plastic part.
Astrodymium's # M68-SPACER-RING spacer rings slip over the M68 male thread of an adapter/extension tube and are primarily used for fine tuning backfocus for astrophotography, but they can be used for other purposes as well.
Each set comes with 12 individual spacer rings, with 4 different thicknesses. 3 of each thickness is included: 0.4/0.6/0.8/1.0 mm.
The width of the rings is 3.95 mm, and the inner diameter is 0.5mm larger than the specified size, for good clearance on the threads (They will not get stuck and are easy to insert or remove).
This item is made out of UV resistant PETG plastic and can handle a temperature of up to 70°C (158°F) without deformation.
Other Information
- Country of Manufacture: Canada