Sharpstar Z4 100 APO

Askar Sharpstar Z4 100mm f/5.5 6-Element Flatfield Apo.

Note: These Telescopes are ordered directly from the Manufacturer which can have an additional lead time. Feel free to contact us for more info if needed.

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 Sharpstar astrographs, the Z4 is designed as self-flattening so there is no need to calculate the back focus. You can just focus the target and the optical system is perfectly corrected for imaging. It is especially ideal for capturing stunning wide-field images of the deep sky over a 36mm (APS-C) sized image circle, however the Z4 is not recommended for use with full-frame cameras.

The tube ring has a handle on the top which makes it easy to carry and assemble. The handle is also designed as a slot where you can mount a finder base etc.

The entire tube has a length of just 482mm with the dew shield retracted and it weighs just 4.3kg. It has a back focus of 77mm, so common M48-rings will work fine when using DSLR cameras or you can use astronomical cameras with accessories.

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 M86, M68, M54, M48 adapters, and the M48 one has an internal thread that can fit 2" filters.

A 300mm Vixen-style dovetail plate also makes it easier to balance on the equatorial mount.

Spec:

• Objective lens: Fully air-spaced sextuplet apo (including two ED glasses)
  
• Aperture: 100mm
  
• Focal Length: 550mm
• Focal ratio: f/5.5
  
• Image circle: 36mm
  
• Focuser: 3.4" rack and pinion, dual speed
  
• Back focus: 77mm from the M48 thread
  
• Rear-end thread: M48x0.75 male thread
  
• Adapters: M86x1-M68x1, M68x1-M54x0.75, M54x0.75-M54x0.75, M54x0.75-M48x0.75 (with M48x0.75 filter thread)
  
• Dew Shield: Retractable
  
• Total length: 482mm
  
• Weight of tube without tube ring and dovetail bar: 4.3kg
  
• Weight tube incl. tube ring and dovetail bar: 5.6kg
  
• Gross weight incl. case and all accessories: 9.3kg

Whats included:

1. Telescope
   
2. Standard finder shoe
   
3. Tube ring
   
4. Dovetail plate (Vixen style)
   
5. Handle
   
6. 4-piece photographical adapter
   
7. Warranty card
   
8. Manual
   
9. Hard case