Telescope Accessories

Astrodon 5nm Narrowband Filters – H-alpha 5nm

H-α (hydrogen-alpha) at 656 nm (nanometers) is deep red in color and the most popular narrowband filter. Hydrogen is ubiquitous in the cosmos and is present in emission nebula (North American, Pelican), planetary nebula (Dumbbell, Ring), Wolf-Rayet objects (Crescent, Thor’s Helmet) and supernova remnants (Veil).

Gently remove dew from your telescope with this dryer. 

• X-Cel LX eyepieces, optimized for planetary viewing, offer a 60° field of view through a six-element fully multi-coated lens system
• Pop-up rubber eyeguards provide comfort and increase contrast.  Raise and lower with a simple twist.
• A treaded rubber grip offers a no-slip grip, even with gloves on
• 1.25” barrels are threaded to accept filters

• Used to get a top-to-bottom correct image
• Useful when a telescope is used for terrestrial observing
• 1.5X magnification
• Only compatible with refractor telescopes

• Four great Moon filters in one kit—everything you’ll ever need for optimal views of the lunar surface
• Three neutral density (ND) filters with different levels of light transmission (13%, 25%, and 50%) allow you to choose the perfect filter for your viewing conditions
• Moon & Sky Glow filter provides high contrast views of the lunar surface and enhances observation of deep sky objects from light polluted skies
• Aluminum filter cells provide a rigid, durable housing for the filter glass and are threaded on top and bottom for stacking
• Kit includes a plastic carrying case with Moon map and legend for identifying the most popular lunar features

• Turn any refractor or Cassegrain telescope into a high-performance daytime spotting scope with our Deluxe 45-deg Correct-Image Diagonal
• High-quality prism diagonal provides a comfortable, 45-deg viewing orientation for great daytime terrestrial views
• Sporting a 27mm clear aperture, multi-coated prism, our Deluxe 45-deg Correct-Image Diagonal provides sharp views that are right-side-up and correct left-to-right
• 3 arcsecond tolerance prism is 35% larger than prisms used in other models, providing a wider, more pleasing view
• Not recommended for use with Newtonian reflector telescopes

Safely attach telescope optical tubes and accessories with Farpoint Vixen Dovetail Plate – Armored Strip – Celestron 9.25 Inch SCT (pre 2008).  This 19″ Vixen style dovetail bar features a stainless steel armored strip to prevent damage.

Dew shield to prevent dew appearance and improve contrast. Easy to fit. Suitable for 6”  telescopes.

NOTE: Sirius Optics recommends that any dew heater strap or heated dew shield be connected to a dual channel dew controller and not directly to 12V.

This allows the user to regulate the current and temperature of the dew heater strap or dew shield. 

The recommended control unit is the Astrozap Dual Channel Dew Controller (Product No. 124474)