William Optics ZenithStar 61II Doublet APO (A-Z61II)

William Optics ZenithStar 61II Doublet APO (A-Z61II)This William Optics ZenithStar 61mm APO refractor with WO Bahtinov mask cover provides more portability and utility than any telescope ever offered by William Optics. The refractor uses FPL 53 glass to produce sharp images for astrophotography or wildlife photography. Still maintaining a portability that makes this telescope a great grab and go tool, the Z61 refractor gives a high power performance both visually and, when paired with the P FLAT61R

The proprietory lens design has our Phantom Group™ wideband multicoating on all air to glass surfaces

UNC - Universal

The FF107 APO adopts a 3+1 quadruplet lens structure which contains two pieces of ED glass that can effectively reduce chromatic aberration and enhance clarity and sharpness

The Celestron C11-A packs serious light gathering ability into a rugged aluminum optical tube

ASI385 series ASI174MM

NexStar Evolution is equipped with 4 auxiliary ports-two on top of the fork and two on the bottom

blending the popularity of an EQ mount with the convenience of an Alt-Az mount

keeping your rock tumbler tumbling smoothly

With this OTA

it will be parfocal with TeleVue's Plössls

It fits F50FB

which explain the history