Astronomy Specialist

SHARPSTAR 0.75x REDUCER FOR 61EDPH-III

$230.00 USD
SKU: SSA-61EDPH-III-R

Sharpstar

  • M68 x 1 Male
  • M48 x 0.75 Male


 

The Sharpstar f/4.4 Full-Frame Reducer for the 61EDPH-III is a dedicated corrector with a reducing power of 0.75x. It reduces the focal length of the 61EDPH-III to 270mm and the focal ratio to f/4.4.

This 4-element corrector delivers an illuminated and corrected field of 44mm, making the 61EDPH-III usable with full frame sensors. The working distance between the flattener and the sensor is 55mm.

The 61EDPH-III f/4.4 reducer can be connected to the focuser of the Sharpstar 61EDPH-III by using the M68 x 1 male thread. The camera side features the universal M48 x 0.75 male thread, allowing standard wide T-rings to be connected without the need for additional spacers. An internal M48 x 0.75 filter thread allows standard 2" filters to be used.

The reducer includes an M54 extension tube which can be removed in case extra backfocus is required. Without this, the resulting backfocus requirement becomes 75mm.

 

Reducing power

0.75 x

Focuser connection

M68 x 1 male

Camera connection

M48 x 0.75 male

Working distance

55 mm (75 mm with M54 spacer removed)

Length

90.46 mm

Weight

400 g

Outer diameter

59 mm

SKU

SSA-61EDPH-III-R


 

  • 0.75x Reducer
  • M54 extension tube 20mm

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SHARPSTAR 0.75x REDUCER FOR 61EDPH-III

$230.00 USD

Optical design

Image circle

Focal ratio

Aperture

Focal length

Optical thickness

Threads

M68 x 1 Male, M48 x 0.75 Male

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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