80/400 SkyWatcher Esprit APO

Sky-Watcher Professional ESPRIT 3-Element ED apochromatic refractors offer optical performance rivalling similar telescopes from even the most famous high-end brands.

Designed primarily for demanding astro-imagers wanting high-contrast images full of detail and zero detectable colour fringing, even on the brightest of objects!  

An M48-fitting doublet field flattener is also available to flatten the field and minimise aberration and distortion. When used with the field flattener the Esprit-80's imaging circle is 33mm.

The M48 fitting provides a large clear aperture to reduce halation and a precision thread ensures the triplet and doublet lens groups are precisely aligned on the optical axis perpendicular to the image. 

Price includes storage case.

Main Features:

• Premium optical materials 
• 3-Element Objective Lens, Focal Length 400mm (one Ohara FPL-53 ED element)  
• Short focal length and full frame corrected focal plane 
• Excellent field flatness across a 33mm imaging circle when used with the optically-matched field flattener
• Precision linear power focuser 
• Metallic high-transmission lens coatings 
• Light-baffled optical systems 
• Telescope tube attachment hardware 
• Knife-edge Baffled Optical System

2.7” Dual Speed Linear Power Focuser

• 2.7” LPF with 2” and 1.25” eyepiece adaptors and indexed scale
• Zero focus-shift during focusing
• High Load Capacity 
• New drawtube with steel sheet held by four large bearings makes focusing smoother than ever
• The smooth focus motion and 11:1 fine focus wheel allows precision adjustment and critical focusing of eyepieces & cameras
• Patent-pending design

Specifications

Optical Design : Apochromatic Triplet with ED element
Diameter : 80mm
Focal Length : 400mm
F-ratio : f/5
Linear Power Focuser Diameter : 2.7" 
Tube Weight : 3.97 kg
Tube Dimensions : 8.3 x 45 cm
  

What's in the box

• Esprit Telescope OTA
• Heavy Duty Foam-Lined Storage/Transportation Case
• 2” Dielectric Star Diagonal
• 9x50 Right-Angled Erect Image Finderscope
• Dovetail Mounting Shoe