The Kowa Adapter Ring for Astronomical Eyepieces (Knurled Screw) gives your TSN-770, TSN-880, or TSN-99x Series Spotting Scope incredible versatility by making it compatible with 1.25" astronomical eyepieces. Simply remove your Kowa eyepiece from your scope and screw this adapter into the scope's threaded eyepiece opening. You can then slide the 1.25" eyepiece into the adapter and secure it via the two knurled screws. The adapter is also compatible with Kowa's 1.6x Eyepiece Extender for deep space observation and photography. TSN-99x scope bodies have a focal length of 583mm and the TSN-880/770 bodies have a focal length of 500mm.
All Kowa spotting scopes, binoculars, or other optical products sold through a United States or Canadian authorized Kowa dealer come with a
Limited Lifetime Warranty*. This warranty gives you specific legal rights and you may have other rights which vary from state to state. Your Kowa spotting scope, binocular, or other optical product is warranted to be free of defects in material and workmanship for the lifetime of the product.
Please call Kowa office to receive an RMA (return merchandise authorization) number before shipping the product to Kowa.
Call Kowa for more information at
1-800-966-5692