TESTAR HELICAL FOCUSER FOR FINDERSCOPES BF25-ZWO 8 mm Weight 94 g

8 mm Weight 94 g SKU BA2954132

These indications are valid for the Southern Hemisphere

The tool provide an intuitive GUI that shows a 2D representation of the sky that can be designed from the user simply by the mouse double click

5Å with detents at every 0

Passing band O-III 6

TESTAR HELICAL FOCUSER FOR FINDERSCOPES BF25-ZWO 8 mm Weight 94 gThe Testar Helical Focuser for Finderscopes allows you to easily convert your straight through Sky Watcher finderscope into a proper guidescope, without the need to modify anything. All you need to do is unscrew the rear eyepiece section and replace it with this. The helical focuser is non rotative, so your cables to not get twisted as you focus. This is the only helical focuser on the market designed specifically for straight through finder scopes