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ZWO DARKENING RINGS FOR EFW
Sale price
$15.00AUD
Regular price
$19.00
Unit price
/
Unavailable
SKU:
ZWO-DARK-D88
The ZWO Darkening Rings is a set of thin shims designed to prevent light leaks occurring in the gap between EFW filter wheels and ZWO imaging equipment.
The D88 rings have an external diameter of 88mm, making them suitable for the EFW 5 x 2", 7 x 2", 7 x 36mm V1 & 7 x 36mm V2. With a thickness of less than 0.2mm, they do not add any significant backfocus distance for most setups. Four rings are included in total.
The D90 rings have an external diameter of 88mm, making it suitable for the ASI461MM-P and EFW 7 x 50mm.
The below diagram shows where to install them in the imaging train:
Specifications
| Optical length | <0.2 mm |
|---|---|
| Clear aperture |
D88: 55 mm & 58 mm; D90: 72 mm |
| Outer diameter |
D88: 88 mm; D90: 90 mm |
