Solar observation

The new Acuter S80 H-alpha solar telescope at a super price!

• Telescope 80/400mm with Crayford focuser
  
• Star diagonal mirror with 8mm block filter for solar observation
  
• Centre mirror without accessories for night observation
  
• Front telescope with <0.6 Å HWB and 40mm diameter
  
• Solar finder
  
• Starpointer
  
• 5-16mm zoom eyepiece (25x-80x)
• Blockingfilter 8mm
• Pressure tuning
  

Altair 130mm Aperture Energy Rejection filter - Ha Hydrogen Alpha only D-ERF for 5" Refractors

Product Features:

• Reduces approx. 98% of heat reaching the optics to keep Etalon from drifting off-band and protect your equipment.
• 30-40nm FHWM Bandpass at H-alpha (H) wavelength of 656.28 nm (Full Width Half Minimum) Transmission: ~90%
• UVIR blocking OD3 0.1% @400-1100nm blocking over 98% of heat to your 3rd party Etalon at eyepiece or camera end, E.g. Daystar Quark). Please note it's your responsibility to use a proper commercial Etalon with this product, and to follow the manufacturer's instructions.
• Visible light blocking: OD4 0.01% @400-700nm to reduce reflection effects and over 98% of heat.
• Diameter 140mm Thickness 12.0mm 
• Multilayer coatings with SiO2 protective overcoat.
• ERF Holder cell included with soft tip threaded knobs. Tough and very light, easy to disassemble for cleaning the filter with optical wipes. Cell does not put any tension on the optics and will not scratch or damage your telescope. It also won't alter the balance as much as an aluminium cell.