Astronomy Specialist

FLAT6AIII 0.8x REDUCER FOR FLT91

$359.00 AUD $459.00
SKU: WO-P-FLAT6AIII-M92
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William Optics



The William Optics Flat6AIII is an apochromatic triplet 0.8x flattener/reducer with STM-coated Ohara lenses. The 44.4mm image circle makes it a perfect match for full-frame sensors. This particular version has an adapter for use with the Fluorostar 91.

The Flat6AIII features adjustable spacing for use with a range of cameras and imaging systems. The Flat6AIII includes an M48 filter thread which will hold any standard 2" mounted filter.

The version for the FLT91 includes an M92 x 1 to M63 x 1 adapter to connect it to the FLT91's focuser. On the camera side there is an M48 x 0.75 male thread, which will accept any wide T-ring.

Note: As this is an adjustable flattener, you must adjust the distance for your specific telescope. See the Instructions tab above.


Reduction factor 0.8 x
Telescope connection M92 x 1
Camera connection M48 x 0.75
Image circle 44.4 mm
Backfocus distance 55mm from M48 thread (after adjustment - see Instructions tab)
SKU WO-P-FLAT6AIII-M92


Note: Once you have unscrewed the rear adapter to the appropriate value in the table below, the remaining backfocus distance to make up will be 55mm from the rear M48 thread.  

Distance adjustment needed for correct backfocus

FLT91 5.4 mm
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FLAT6AIII 0.8x REDUCER FOR FLT91 & FLT120.

FLAT6AIII 0.8x REDUCER FOR FLT91

$359.00 AUD $459.00

Optical design

Image circle

Focal ratio

Aperture

Focal length

Optical thickness

Threads

Cooled

Colour or Mono

Pixel size

Sensor dimensions

Resolution

Sensor diagonal

Quantum efficiency

Read noise

Fullwell capacity

Bit depth

FPS

Camera backfocus

Filter size

Filter size

Bandpass (FWHM)

Bandpass (FWHM)

Glass thickness

Mount type

Payload capacity

Latitude range

Dovetail saddle

Slew speed

Encoders

Periodic error correction

Counterweight shaft

Azimuth adjustment range

Internal diameter

Illuminated diameter

Compatible telescope external diameter

Weight

Length

Width

Height

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