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ZWO DARKENING RINGS D88 FOR EFW
$19.00
Unit price
/
Unavailable
SKU:
ZWO-DARK-D88
ZWO
ZWO DARKENING RINGS D88 FOR EFW is backordered and will ship as soon as it is back in stock.
The ZWO Darkening Rings D88 is a set of thin shims designed to prevent light leaks occurring in the gap between EFW filter wheels and ZWO imaging equipment.
The 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 below diagram shows where to install them in the imaging train:
Specifications
| Optical length | <0.2 mm |
|---|---|
| Clear aperture |
55 mm & 58 mm |
| Outer diameter |
88 mm |
| SKU | ZWO-DARK-D88 |
