3インチフェザータッチフォーカサー用48mm大口径写真用フラットナー (SFF3-3FT-48)

I was worried about vignetting with my f-7 refractor, but this flattener keeps stars sharp corner-to-corner. Threading directly onto the Feather Touch focuser was easy, and the 48mm optic gives me plenty of room for my full-frame camera.

This oversized 48mm optic really pulls the stars tight across my APS-C sensor, with no visible falloff at the corners. I'm getting sharp stars right to the edge of the field now, which was impossible with my old setup. The threading was smooth and precise onto my 3" focuser, making installation a br

Threaded perfectly onto my Feather Touch focuser with no adapters needed, and the 48mm clear aperture gives me sharp stars all the way to the corners of my full-frame sensor. Definitely worth the upgrade for my f-7 refractor.