ZWO Duo-Band Ha & OIII Filter - 2" - DB2 Prime Focus Camera Adapters Explore Scientific Finderscope Rings are

Explore Scientific Finderscope Rings are all made for 50mm finders

Together with one-shot color astronomical cameras

Users of achromatic refractors will be particularly pleased with the performance using this additional filter

Excellent 65 degree field of view

90 day for battery

ZWO Duo-Band Ha & OIII Filter - 2" - DB2 Prime Focus Camera Adapters Explore Scientific Finderscope Rings areThe Duo Band filter offers an economical entry into the world of narrowband imaging with a color camera and can also offer a practical solution to imaging in light polluted urban areas. The 2" Duo Band is a dual narrowband filter primarily aimed at complementing color ZWO ASI cameras. The Duo Band filter is aimed at the astronomer who may already own a One Shot Color (OSC) camera and wants to image using narrowband techniques or emission objects