ZWO New EOS Lens Adapter for EFW
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The Short EOS adapter for EFW & Cooled camera(6.5mm backfocus version).
Extend distance: 17.5mm
This new type is unadjustable. EOS-EFW support Canon EF lens only, cannot work with EF-S lens.
So you can use Canon Lens with ASI1600 and EFW
