TEC 折射望遠專用 0.9x 焦點縮減修正器

Had a perfect first light with this last night—my stars went from bloated to pinpoints across the whole frame. The threaded connection on the rear makes swapping filters feel secure and repeatable.

Finally got the spacing dialed in with the 0.9x reducer—it really flattens the field edge-to-edge on my scope. Stars look pin-sharp all the way across the frame now, even with my DSLR.

First light with the .9x corrector and the corner stars in my full-frame shots are finally round instead of seagulls. Backfocus landed right at the spec, so I didn't have to fiddle with spacers. Solid glass, no visible color shift either.