Useful opening 550mm – Controlled by USB from PC - Digital voltmeter for perfect brigthness reproduction and thus reproducible exposures - 12 V DC connection perfect for field operation

Useful opening 250mm – Controlled by USB from PC - Digital voltmeter for perfect brigthness reproduction and thus reproducible exposures - 12 V DC connection perfect for field operation

• Laser-Collimator for easy collimation of your telescope in 1-2 minutes
• High-quality, impact-resistant and highly accurate laser, with concealed setscrews
• Precision-machined, hard-anodized barrel instead of the less accurate 1¼" chrome barrel
• Handle protector made of silicone rubber facilitates handling with gloves
• Suitable for Newton and SC telescopes, instructions included

• Flat field free of optical aberrations like field curvature, coma, astigmatism and chromatic aberration across an entire APS-C sensor.
• Unlike the larger RASAs that work with DSLR and large CCD cameras, the 8” model was designed with color astronomical CMOS cameras, smaller CCD cameras, and mirrorless cameras in mind. The telescope does not work with standard DSLR cameras.
• NEW Ultra-Stable Focus System – six precision sealed ball bearings virtually eliminate image shift.
• Integrated air cooling system –12V DC MagLev fan reduces cooldown time and provides optimal air flow while filtering out dust.
• Internal filter mount – seamlessly accommodates a Light Pollution Imaging Filter into the optical path.
• CGE dovetail mounting rail.
• Performs over a wider spectral range than most telescopes, from 390-800 nm, so more of the light passing through the astrograph is in sharp focus.

• Blocks UV below 400nm and IR above 680nm
• Maximum transmission, scratchproof hard coated
• non-ageing sealed coating edges

• 4 filters L-RGB
• Ultra high contrast impermeable RGB-Filter, IR-blocked
• NO halos, NO reflections, NO ghosting
• non-ageing sealed coating edges

• 4 filters L-RGB
• Ultra high contrast impermeable RGB-Filter, IR-blocked
• NO halos, NO reflections, NO ghosting
• non-ageing sealed coating edges

• ultra hard and bright O-III visual contrast for 6" and larger telescopes
• no visual color fringing, just pure O-III
• non-ageing sealed coating edges

• ultra hard and bright O-III visual contrast for 6" and larger telescopes
• no visual color fringing, just pure O-III
• non-ageing sealed coating edges

• Premium grade H-alpha full frame chip CCD-filter for fast optical systems f/10 to f/2.8
• IR-blocked
• NO halos, NO reflections, NO ghosting
• non-ageing sealed coating edges

• Premium grade H-alpha interline chip CCD-filter for fast optical systems f/10 to f/2.8
• IR-blocked
• NO halos, NO reflections, NO ghosting
• non-ageing sealed coating edges

• Premium grade H-alpha interline chip CCD-filter for fast optical systems f/10 to f/2.8
• IR-blocked
• NO halos, NO reflections, NO ghosting
• non-ageing sealed coating edges

• 1¼" Contrast Booster Filter that completely eliminates false color
• Removes the bluish "hue" (=lack of contrast) during lunar, planetary, solar and terrestrial observation
• Boosts contrast and sharpness for fast achromatic telescopes - with over 95% transmission
• Planeoptically polished, non-ageing sealed coating edges

• 1¼" Contrast Booster Filter that completely eliminates false color
• Removes the bluish "hue" (=lack of contrast) during lunar, planetary, solar and terrestrial observation
• Boosts contrast and sharpness for fast achromatic telescopes - with over 95% transmission
• Planeoptically polished, non-ageing sealed coating edges

• Much larger prism as in the so-called "Erecting prism"
• Many Erect image prisms have only 19 mm free passage opening and therefore are not suitable for terrestrial observations at low magnifications, because the field of the eyepiece is shaded by the too small prism.

The adapter allows connecting 2" accessories to adapters, correctors and focusers with male M48x0.75 thread

• Telescope-sided connection: M48x0.75 thread (female)
• Eyepiece-sided connection: 2" receptacle (female)
• Length: 40 mm
• Locking via 2 knurled screws and brass compression ring

• Ideal for Accurate Polar Alignment
• Well suited for use with Off-Axis Guiders for centering and guiding of stars
• Adjustable red LED light brightness control to illuminate crosshairs and preserve night vision
• Double crosshair reticle for accurate centering and guiding of stars
• Fully coated optics for excellent light transmission on faint stars
• Includes reticle eyepiece and illuminator