Sky-Watcher Esprit 80 mm F/5 with flattener

The Esprit series refractors from Sky-Watcher are specially designed optical instruments catered to the needs of the most demanding astrophotographers and enthusiasts of visual observations. These refractors offer uncompromising solutions, ensuring exceptional performance. One of the standout features of all Sky-Watcher Esprit models is their ability to minimize optical defects within the field of view, including off-axis aberrations such as distortion and chromatic aberration.

At the heart of the Sky-Watcher Esprit 80 mm F/5 refractor lies an apochromatic triplet lens system crafted with the utmost precision using the highest quality Schott BK-7 and FPL-53 ED glass. The careful selection of materials for the lenses, combined with a multi-layer anti-reflective coating, guarantees a sharp image with perfect color reproduction. Moreover, an internally partitioned system has been specially designed to ensure optimal contrast.

This instrument comes with a dedicated flattener featuring an M48 connector, allowing for seamless integration. It is compatible with a robust 2.7" diameter focuser, capable of supporting a load of up to 5 kg without compromising alignment. This means that even large professional SLRs can be easily connected to this refractor.

Key Features of the Sky-Watcher Esprit 80 mm F/5 Refractor:

• APO ED triplet lens system constructed with high-quality FPL-53 ED and Schott BK-7 glass, coated with a multi-layer anti-reflective coating.
• Dedicated flattener with M48 fitting included in the set.
• Sturdy 3" diameter focuser enables mounting of heavy SLRs without the risk of losing alignment.
• Fold-out dew shield facilitates easy transportation of the optical tube.

Technical Specifications:

• Optical system: ED-APO apochromatic triplet.
• Objective diameter: 80 mm.
• Focal length of the lens: 400 mm.
• Focal ratio: f/5.
• Resolving power: 1.75".
• Star range: 12.5 mag.
• Maximum usable magnification: 160x.
• Lens materials: FPL-53 Super ED glass (Ohara, Japan), Schott BK-7 glass (Schott, Germany).
• Anti-reflective coating: Full MHT multilayer coating.
• Fully illuminated circle diameter: 33 mm (with flattener).
• Back focus: 66 mm (with flattener).
• Eyepiece diameter: 2.7", with reduction to 2".
• Eyepiece type: Linear Power, microfocus 1:11.
• Maximum lifting capacity: 5 kg.
• Finder: Angular, 9x50.
• Angle attachment: Dielectric mirror.
• Tube length: 450 mm.
• Tube diameter: 83 mm.
• Weight: 3.9 kg.

Kit Components:

• Sky-Watcher Esprit 80 mm F/5 refractor.
• Vixen-type dovetail rail (width 45 mm).
• Tube clamps.
• Dedicated flattener with M48 mount.
• 9x50 angular finder.
• 2" angle attachment.
• Threaded reduction 2.7/2".
• Aluminum trunk.
• T2/M48 ring (Canon).

Warranty:

The Sky-Watcher Esprit 80 mm F/5 refractor comes with a warranty period of 60 months, ensuring peace of mind for your investment.