Focal Reducers & Flattener Combos

Looking to make your Astro-Tech (or variant) scope faster and flatter for photography? Then the .8x reducer/flattener is exactly what your are loo...

Looking to make your Astro-Tech (or variant) scope faster and flatter for photography? Then the .8x reducer/flattener is exactly what your are loo...

You've got 115mm of ED triplet glass pointed at the sky. The AT115EDT's optics deliver clean color correction — three FK-61 elements working togeth...

You've got 130mm of ED triplet glass pointed at the sky. The AT130EDT's optics deliver clean color correction — three FK-61 elements working togeth...

The AT102EDL is a versatile doublet APO at 714mm f/7 — plenty of focal length for mid-range targets and sharp enough for visual work on any given n...

The AT90CFT and AT90EDX are excellent visual scopes at 540mm f/6, but if you're imaging through either one, you already know the two things an f/6 ...

The AT125EDL is a serious visual scope at 975mm f/7.8, but when you turn it toward astrophotography, two things work against you: the curved field ...

The Astro-Tech AT152FF 0.8x focal reducer/field flattener is designed specifically for prime focus astrophotography with the AT152EDT triplet refra...

Astro-Tech AT115EDTRFv3 0.8× Reducer/Field Flattener The AT115EDT is a triplet apochromat — three air-spaced elements that bring color under tight ...

Astro-Tech AT130EDTRFv3 0.8× Reducer/Field Flattener A triplet apochromat like the AT130EDT does one thing very well: it controls color. Three elem...

The AT80EDLRF is the dedicated 0.8× reducer and field flattener for the Astro-Tech AT80EDL f/7 doublet APO refractor. It does two things at once: i...