When the pixels of a guide camera becomes small and QE becomes high, you may not need a big guide scope; smaller pixels can detect the guide error in a shorter focal length. Furthermore, when the focal length is reduced, the FOV becomes larger, so it is easier to find bright guide stars. The QHYCCD miniGuideScope is based on just this idea. The miniGuideScope is a 30mm f/4.3 (130mm FL) ultra-small telescope. It has no complex focal adjust system. Just rotate the front of the OTA and it provides fine focal adjustment. Once focus is achieved, the tube can be locked into position and there is no need to focus again unless the system is moved. The QHY miniGuideScope provides pin-point star images as sharp as any lens in the industry. Specifications Model miniGuideScope Diameter 30mm Focal Length 130mm Aperture 1:4.3 Object Lens Type Doublet Focus System Front Side Focuser Focus Locker Yes Camera Interface C/CS Mount Compatible Cameras QHY5II and QHY5III series Anti-Scatter Light Matt Paint Yes, Internal painted Weight (OTA only) 111g Telescope Connector Optional Standard ViewFinder Scope Connector with Tripod Screw Thread Diameter of the OTA 31.6mm Focus Adjustable Range Inf. to 1.5 meter
