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HF4 Focuser 


The Hercules Telescopes focuser is a masterpiece.  
With it's sleek and perfectly cylindrical design, it can fit where space is limited or in the middle of a prime focus telescope like our HTP500.  It's Rigidity and high precision without backlash make the HF4 focuser a perfect choice for an high quality image train.
The linearity movement is made using precision guide rails that stay perfectly aligned even at outermost position with lot of weight.
HF4 is design so that a 4 inches corrector can fit inside and save space on your image train. 
Camera adaptor can be mounted on the focuser using 105 X 1mm thread or with 6 X M4 screws.
(Adaptors can be found at
The HTEC commander is request to use the HF4 (Optional).
HF4 Focuser


  • 104mm aperture (4 inches)

  • 29mm travel with 105Nanometer résolution

  • Extremely strong with 20kg capacity (44 lbs)

  • 102 nanometers resolution

  • High precision built with pricésion guide rails

  • Linear movement with antibacklash ballscrew

  • Controlled by the HTEC commander (Optionnal)

  • 160mm outside diameter (cylindrical design)

  • 99mm height, 2.5kg weight

Price : 2 400$

Technical drawing

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