Swarovski Booster for EL32 and SLC (42-56mm)
For all EL 32 and SLC model Swarovski binoculars (except 8 x 30 WB). This handy gadget will double the magnification of your binoculars in an instant. For example; the booster converts the SLC 15x56 WB into a monocular telescope with 30x magnification. Easy to assemble: simply unscrew one of the two twist-in eyecups on your binoculars, and screw on the booster.