This very elegant 2" reducer/field flattener has been designed to optimize the flat-field imaging performance of William Optics F/6 ratio refractors.WO Flat 6A will provide good illumination and flat field across APS sized sensors and smaller.
APS size - Superb Finish
♦ Designed with APS chip-size DSLR cameras in mind.
♦ FMC doublet design.
♦ Produced entirely with the best Ohara optical glasses.
♦ William Optics polished anodized finish.
♦ All internal surfaces threaded and blackened to prevent reflections.
♦ Reducing factor 0.8X - save 36% exposure time
♦ It will flatten the field amazingly well and finally make you see those stars round! Differently from other brands´ refractors, this flattener works amazingly well with all 80mm F/6 refractors.
Easy to Use
♦ Standard T2 connection - accepts T2 Rings
♦ 55mm working distance (DSLR Camera + T2 Ring .. ready)