Compatible with the following current Kowa System-S spotting scopes:TSN663M/664MTSN-601/602TSN-82SVDigiscoping adapter for DSLR, as well as compact and mirrorless system cameras.It has never been easier to digiscopy with a Kowa spotting scope.The eyepiece is unscrewed from the spotting scope body. The inner ring of the TSN-PA8 adapter is connected directly to the spotting scope body using the accessory thread. The eyepiece is then reattached to the spotting scope and the outer ring of the TSN-PA8 adapter can now be slid over the eyepiece and fixed in place with the knurled screw. It was developed for use in combination with the TSE-Z9B eyepiece, so that the entire zoom range can also be used for digiscoping, allowing very long focal lengths to be achieved. this adapter can also be used with many older Kowa spotting scope models that have been on the market for decades. For details, you can download the relevant information from our Kowa System S-Link.