This adapter allows you to use standard 1.25” barrel size telescope eyepieces in your Zeiss spotting scope. With literally hundreds of 1.25” astronomical eyepieces available, you can greatly expand your magnification and field of view possibilities over the limited number of dedicated Zeiss spotting scope eyepieces.
The adapter is quite simple. There are two main parts. One is a lightly-ribbed threaded ring that fits the male threads around the eyepiece port on the rear of a Zeiss Diascope. The second is a 1.25” barrel with a setscrew that holds the eyepiece.
Simply lay the threaded ring on top of the 1.25” barrel. Slip a 1.25” eyepiece through the ring and into the 1.25” barrel. Tighten the setscrew in the barrel with the supplied metric key to hold the eyepiece firmly in the barrel. Slip the entire assembly into the eyepiece port in the rear of your scope; tighten the threaded ring on the male threads at the rear of the scope to hold the eyepiece in place; and you’re done. To change back to your Zeiss eyepiece, simply unthread the 1.25” eyepiece assembly and attach your Zeiss eyepiece to your scope in its place.
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