S&T Test Report M48 adapter ring 48-mm filter 0.83× reducer 1× field flattener M42 adapter ring 2-inch twist-lock clamp t Left: The FOT86's 1× flattener accepts 48-mm (2-inch) filters and comes with a choice of M48 and M42 camera-side adapter Rings. Right: The Draco 62 has two camera adapters, with M48 and M54 cameraside threads. The M64 ring is required when shooting at f/4.8, but not when using the reducer, which threads into the focuser. Either adapter ring then threads over it. The reducer and the M64 ring each accept 2-inch filters. accepts 2-inch filters Rotator with M64 threads M48 adapter ring M54 adapter ring M64 adapter ring accepts 2-inch filters FOT86 Draco 62 pThe FOT86 with its 1× flattener at f/6.5 yielded pinpoint stars to the corners of a full-frame sensor. There was no sign of astigmatism distorting stars into birds! All corners looked the same, with no focal plane tilt. pAt its native f/4.8 focal ratio, the Draco 62 was virtually perfect across a full-frame sensor. This and the other test images are single fully developed RAW files from a stack used to produce a final image. 70 MARCH 2025 * SKY & TELESCOPE