Skip to content
ProAstroz - Australia's leading William Optics & exclusive Founder Optics Distributor
ProAstroz - Australia's leading William Optics & exclusive Founder Optics Distributor

William Optics Fluorostar 91 FLT91 f/5.9 Imaging APO Triplet Refractor FPL-53

Save $149.00 Save $149.00
Original price $3,299.00
Original price $3,299.00 - Original price $3,299.00
Original price $3,299.00
Current price $3,150.00
$3,150.00 - $3,150.00
Current price $3,150.00
Color: Red

William Optics Fluorostar FLT91 f/5.9 Imaging APO Triplet Refractor FPL-53 - Australian Authorised dealer

Add the FLAT6AIII 0.8x flattener here
Add the FLAT68III 1x flattener here

The FLT91 is compatible with both the FLAT6AIII - a 0.8x flattener/reducer - AND the 1.0x FLA68III flattener - providing excellent imaging versatility.

Please note: the guide scope in the photos is not included - this is an optional extra you can find here. 

Carrying case is included. 

The William Optics FLT 91 is the perfect apochromatic refractor for visual and photographic astronomers demanding excellence in a midsize telescope. The three-element optical design features a 91mm aperture using FPL-53 glass. The STM coatings and superb quality provide excellent optical performance and unmatched value.

The Rotolock 2 inch adapter provides for a solid and efficient connection for a WO 2 inch diagonal, and other accessories.

The retractable dew shield features a removable lens cover, with our patented Bahtinov Mask revealed by unscrewing the faceplate. The clear design allows for brighter star patterns and precise focusing for astrophotography.

The Saddle Bar Handle offers a solid handle with a built-in dovetail chamber for use with the WO Uniguide scopes or other V-style guiding/finder scopes.

The super-smooth field rotator includes markings for every degree and a solid thumbscrew position lock.

 


Settings:

Visual setup:
FLT91 + 2"diagonal + eyepieces.
It is recommended to use the included extension tube.

Imaging:
FLT91 + Flat6aIII + CCD (55mm CCD setup)
When using the flattener the extension tube should be removed.

Flat6AIII settings - 5.4mm.