WILLIAM OPTICS ULTRA-CAT 56 f/4.8 REFRACTOR Counterweight SKU 170mm carbon look

SKU 170mm carbon look

resulting in the observed pattern

iEQ30/iEQ30 Pro (may limit low latitude application)

The focuser includes a high-precision 360° rotator with engraved scale and knurled locking screw

the OCAL makes the daunting task of collimation a breeze

WILLIAM OPTICS ULTRA-CAT 56 f/4.8 REFRACTOR Counterweight SKU 170mm carbon lookThe William Optics UltraCat56 is a high performance 56mm apochromatic refractor designed for astrophotographers who demand top tier performance. Featuring a 5 element advanced Petzval optical design and a fast f 4. 8 focal ratio, it delivers breathtaking edge to edge clarity and vivid details, making it perfect for capturing expansive celestial views. Its robust build, exceptional optics, and innovative features redefine the standard for