ZWO FF131 f/7.5 APO REFRACTOR Binoviewer This is particularly useful when

This is particularly useful when using lucky imaging techniques with telescope larger than 5 - 8" in diameter

Smooth and precise control of the adjustments are provided by an oil-sealed mechanism and the laser-engraved angle scale of the components

These filters are made from quartz glass which has an ultra-low thermal expansion coefficient and outstanding thermal and mechanical properties

Observatory astrophotography mount ideal for both visual and Astro-photographers

very low readout noise and large full-well depth of 51

ZWO FF131 f/7.5 APO REFRACTOR Binoviewer This is particularly useful whenThe ZWO FF131 is an apochromatic quadruplet flat field astrograph that offers high performance for an exceptionally low price. The quadruplet design makes it perfect for both visual observation and astrophotography. The objective lens features an element of extra low dispersion glass (ED) that minimizes chromatic aberration. The ZWO FF131 is a versatile instrument and excels not just at imaging, but as a grab & go visual telescope (eyepieces &