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Sharpstar Z4 ED Sextuplet Apochromatic Refractor Telescope
Sharpstar Z4 ED Sextuplet Apochromatic Refractor Telescope

Sharpstar Z4 ED Sextuplet Apochromatic Refractor Telescope

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Product Code
Telescope Type
Aperture (mm)
100 mm
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Sharpstar Z4 ED Sextuplet Apochromatic Refractor Telescope


According to user and market demands, Sharpstar has newly launched an integrated astrograph, the Z4. It has an aperture of 100mm and a focal ratio of f/5.5.
The Z4 is a sextuplet astrograph with three pieces of lens at the front and three pieces at the back, and two of them are ED glasses. Just like other series of Sharpstar astrographs, the Z4 is designed as a self-flattened astrograph, so there is no need to calculate the back focus. You just make the target to stay in focus, and the optical system will be perfect for imaging.

The appearance of the Z4 breaks with the previous styles of Sharpstar with its matte grey coating. The light grey lens tube plus dark grey focuser and tube ring (clamp) make the astrograph look calm, but vibrant. The tube ring has a handle at the top, so it is easy to carry and assemble. The handle is designed as a slot on which you can mount a finder base, etc. 

The Z4 uses a large 3.4” focuser with a 1:10 fine adjustment knob and a 360° rotator for easy focusing and angle adjustment. It has M82, M68, M54, M48 adapters, and the M48 one has an internal thread that can fit 2” filters. And a 300mm Vixen-style dovetail plate, makes it easier to balance on the equatorial mount.

Sharpstar Z4 ED Sextuplet Apochromatic Refractor Telescope Supplied with:

  • a tube ring (clamp or shell)
  • a handle
  • ASKAR 300mm dovetail bar
  • quality control inspection list
  • instruction manual
  • warranty document
  • a 4-piece photographical adapter

Specifications: Sharpstar Z4 ED Sextuplet Apochromatic Refractor Telescope

  • Aperture: 100mm
  • Focal Length: 550mm
  • Focal Ratio: f/5.5
  • Objective type: sextuplet fully air-spaced APO (including two ED glasses)
  • Overall length: 482mm
  • Weight: 4.3kg
  • Weight with accessories: 5.6kg (without the aluminium case)
  • Back-end adapter: M48x0.75 male thread
  • Image circle:36mm
  • Maximum accessory connection:

          M54×0.75-M48×0.75(with M48×0.75 filter thread)

What's in the Box

What's in the Box: Sharpstar Z4 ED Sextuplet Apochromatic Refractor Telescope

  • Sharpstar Z4 ED Sextuplet Apochromatic Refractor Telescope
  • Tube Ring (clamp or shell)
  • Handle
  • Askar 300mm Dovetail Bar
  • 4-piece Photographical Adapter
  • Quality Control Inspection List
  • Instruction Manual
  • Warranty Document
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