Astronomy Specialist

SHARPSTAR 61EDPH-III APO TRIPLET F/5.9

$999.00 AUD
SKU: SS-61EDPH-III

Sharpstar

Apochromatic triplet

61 mm

f/5.9

360 mm

  • M68 x 1 Male

1.92 kg


Corrector

 

The Sharpstar 61EDPH-III APO is a fast apochromatic triplet with a focal ratio of f/5.9 and a focal length of 360mm. The newly-redesigned objective lens includes two Extra-Low Dispersion elements for excellent colour correction.

This telescope is light and compact, making it perfect for small equatorial mounts such as the Sky-Watcher Star Adventurer GTI. For imaging, two correctors are available -  a 1x field flattener and a 0.75x reducer (both sold separately), the latter resulting in a wide focal length of 270mm and the focal ratio f/4.4. These correctors are specifically designed for the Mark III version and deliver an exceptionally large corrected image circle of 44mm, making it suitable for full-frame sensors. 

The large 2.5" rack and pinion focuser can be rotated 360° and has a reduction gear of 1:10 for precise focusing. The focuser is compatible with the ZWO EAF electronic focuser bracket.

The telescope includes a 200mm long Vixen-style dovetail bar to make balancing easier with heavy image trains. Also included is a multifunctional handle which acts as a finder-style saddle for guide scopes and other accessories.

All the lenses are fully multi-coated and the tube is internally blackened to reduce reflections and absorb stray light. The tube is made of aluminium, the rack and pinion focusing mechanism of brass and the mechanical components are engineered to provide the best rigidity, performance and durability.

 

 

Optical design

Apochromatic triplet air spaced with 2 x ED lenses

Objective diameter

61 mm

Focal length

360 mm

Focal ratio

f/5.9

Resolving power

1.97 arc second

Stellar limiting magnitude

11.61

Max. magnification

152.5 x

Light gathering power

73 times the human eye

Mount attachment

Vixen bar (200 mm long)

Focuser

2.5" rack & pinion dual speed (10:1)

Camera connection

M68 x 1 male / 2" / 1.25"

Backfocus

55 mm from corrector (sold separately)

Tube weight

1.48 kg (1.92 kg including tube rings and dovetail bar)

Tube length

272 mm (327 mm with dew shield extended)

Tube diameter

75 mm

Dew shield diameter

82.6 mm

SKU

SS-61EDPH-III

 

 

 

  • SharpStar 61EDPH-III f/5.9
  • 75mm tube ring
  • 200mm Vixen-style dovetail bar
  • Multifunctional handle
  • Adapter to 2" and 1.25"

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SHARPSTAR 61EDPH-III APO TRIPLET F/5.9

From $999.00 AUD

Corrector

  • OTA Only
  • With 1x Flattener
  • With 0.75x Reducer

Optical design

Apochromatic triplet

Image circle

Focal ratio

f/5.9

Aperture

61 mm

Focal length

360 mm

Optical thickness

Threads

M68 x 1 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

1.92 kg

Length

Width

Height

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