Telescope-Accessories-William Optics Ultra Flat 156 and 0.79x Reducer for FLT156

Fluorostar 156 Ultra Flat—The 0.79x FLT156 Full-Frame Corrector!

The massive William Optics Fluorostar 156 competes squarely in a heavy-weight
class, and that is not just due to its physical size—as massive FPL-53
and lanthanum glass elements combine in this triplet titan’s optical design
for truly incredible optical performance. When it comes to harnessing this
scope’s massive performance you need some serious gear, which is where the
William Optics Ultra Flat 156 and 0.79x Reducer for FLT156 comes in. Distill
the FLT156’s astrophotography prowess now!

At 1217 mm of focal length, the William Optics Fluorostar 156 Triplet APO
Refractor provides a limited view of some larger deep sky targets such as the
Orion nebula and the Pleiades with its 156 mm f/7.6 optics and full-frame
cameras. For more comfortable framing on these targets and wider, more
panoramic, perspectives, the Ultra Flat 156 0.79x Reducer is the perfect
solution! Designed to connect seamlessly to the FLT156 refractor, this
corrective element provides an M54x0.75 connection and 43.2 mm image circle
for connection and coverage of large dedicated full-frame
astrophotography cameras and accessories on the market today.

Please Note: This flattening reducer is designed for the industry standard back focus of 55 mm. While it does not feature backfocal adjustment functionality, William Optics indicates small adjustments can be made by inserting a PVC spacer between the end cap and main corrective element housing.

Dedicated William Optics Fluorostar 156 Astrophotography Upgrade

If you’re looking to maximize the astrophotography performance of your
William Optics FLT 156 6″ f/7.8 Fluorostar APO Triplet Refractor
and expand your view into the night sky, then this is the corrective element
for you!

Augmenting Ultimate APO Optics
Featuring a 0.79x focal
reduction, this flattening reducer takes the 1217 mm focal length of the
FLT156 to around 961 mm, providing a noticeable widening of your telescope’s
perspective on celestial targets. This additionally increases the scope’s
speed from f/7.8 to f/6.2, providing a brighter comparatively brighter image
to your camera. This flattened image covers a 43.2 mm image circle, covering
sensors up to full-frame!