840-0110-A1 can be attached to the platform of 840-0110-T mount on any side. Optics is firmly held by a stainless steel fixing screw and it rests against two contact lines - the edges of the cut-off corner. The frame doesn't obstruct the view. It allows to work with two beams situated very close to each other.
840-0110-A1-4 fixes thin optical elements Ø30÷40mm.
840-0110-A1-2 fixes elements Ø20÷25 mm (1").