ASTROZAP 90-100MM FOCUSING CAP W/BAHTINOV WHEEL AZ-402
Item No. 793-11002
Manuf. No. Astrozap AZ-402
Astrozap focusing cap for ETX 90 90mm-100mm, with integrated Bahtinov focusing wheel, AZ-402
Unlike 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 focusing wheel can be easily removed and replaced with an off-axis wheel for off-axis viewing, or an off-axis solar filter wheel for solar viewing on larger telescopes.
- Simply turn the thumbscrew to the open position, and turn to close.
- No plastic plugs required, and no tools needed.
- Optional wheels for off-axis viewing and off-axis solar viewing available for larger telescopes.
- Astrozap focusing caps are made from lightweight aluminum and powder-coated texture black.