The TSN-EX16 extends the Kowa TE-11WZ eyepiece from a 25-60x zoom to an incredible 40-96x zoom with virtually no light loss. The Kowa TSN-EX16 simply screws on to your scope body via the existing adapter thread. The sleek design of the adapter perfectly compliments the Kowa 880/770 spotting scope bodies. The TSN-EX16 Extender can be used for angled & straight viewed scopes. The TSN-EX16 Extender also features its own screw thread which allows for easy connection of Kowa digiscoping adapters and accessories. Kowa 1.6x Eyepiece Extender for TSN-880/770, TP556 - TSN-EX16