ZWO EFW 8 x 1.25″/31mm Refractor Telescope This becomes especially useful with

This becomes especially useful with ultra low focal plane (visual Newtonian) telescopes

Autoguiding connection for astrophotography

4 arc-minutes (6356 Counts/Rev

Compatible filters 8 x 1

SynScan Hand Controller and Cable

ZWO EFW 8 x 1.25″/31mm Refractor Telescope This becomes especially useful withThe ZWO 8 x 1. 25" Electronic Filter Wheel weighs only 400 grams, is CNC machined and has an optical thickness of only 20mm. This model can take 8 x 1. 25 mounted or 31mm unmounted filters. The power absorption of the EFW is only 120mAh @ 5V so any USB cable can power it. The distance between the filter and sensor of the Pro cameras like the ASI533MM Pro is circa 10mm. This close distance prevents any vignetting with 1. 25 filters for telescopes up to