The mounting of the DX 102 is completely manual, with flexible rods to allow what are T called slow motions providing a finer control over the movement than simply pulling and pushing the instrument. The extra ingredient over a standard manual mounting is the attachment for a smartphone, directly fixed to the central assembly. This is not to be confused with smartphone attachments that simply enable you to take photos of bright objects through the eyepiece, as found on some other beginners’ instruments.
This is an achromatic refractor with a 102mm doublet lens composed of two different types of glass. It has a focal ratio of f/6.5, which means that it has a comparatively short tube for its diameter – a situation that provides a wide field of view and bright image with a fairly
