Astrozap Focusing Cap Sky-Watcher Refractor Dew Shield List Vixen: R200SS

Vixen:  R200SS

16" Total Length

Unlike a simple Hartman or Bahtinov mask

Outside Diameter Fit Range (Your optical tube OD needs to be within this range of fit)

Binocular Pair

Astrozap Focusing Cap Sky-Watcher Refractor Dew Shield List Vixen: R200SSUnlike a simple Hartman or Bahtinov mask, the Astrozap focusing cap is a multi purpose tool which allows for quick 'shutter like' operation. Just turn the wheel to the open position for focusing, and then turn it again to the closed position to keep the dust out, or to image dark frames with your CCD or DSLR camera. The inside of the focusing cap is lined with soft foam to protect the finish on your scope or lens shade. Three nylon thumbscrews tighten