![]() Just after the field rotator, is a slot for a 48mm threaded astronomy filter. To ensure that you will have the most precise framing possible in a small portable system, the camera can be rotated to with accuracy. Focusing is similar to a telephoto camera lens with a smooth helical style focuser which has an attractive finish and engraved calibration markings, and it includes a tension adjustment to increase focusing drag or to lock the focuser in place for fast and accurate focusing. Inspired by luxury watches, the field rotator is fully rotatable by 360 degrees and is laser etched with a degree indicator rotator marked to a precision of one degree. The helical focuser mechanism has also been improved. This internal focusing mechanism keeps the dewshield stationary as you change focus (no more snagged or twisted cables or dew heating strips). ![]() ![]() The William Optics RedCat 51 II has received updates from the original RedCat 51 including a revamp for finer focus control via the dewshield tension control adjustment. The William Optics RedCat 51 II refractor telescope features a 51mm objective lens in a sleek quadruplet Petzval APO design, using Synthetic Fluoride (FPL53 and FPL51) glass for a full frame flat field image.
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