Lunt ED Doublet optical tube assemblies come in three apertures: 70 mm, 80 mm, and 102 mm. These OTA's can be used for White Light, CaK, or nighttime use with the addition of the proper filters or accessories. Lunt Engineering is a division of Lunt Solar Systems, and these product can be used with Lunt Solar Systems solar products or for standard nighttime use.
Features
- Fully multi-coated ED doublet optics provide reduce chromatic aberration
- Sturdy Aluminum optical tube
- 2" Crayford-style 10:1 dual speed focuser provides precise smooth focus operation
- Retractable lens shade
- Includes carry case
Specifications
- Aperture: 80mm (3.1")
- Focal length: 560mm
- Focal ratio: f/7
- Lens construction: ED Doublet
- Focuser: 2" Crayford focuser with 10:1 fine-focus, brass compression ring
- 1.25" reducer adapter with brass compression ring
- Finderscope: sold separately
- Focuser pre-drilled for finderscope adapter
- Star diagonal: sold separately
- Machined Aluminum mounting ring
- 1/4" 20 tpi standard tripod thread on bottom of mounting foot
- Length: 44.5cm (17.5") collapsed length
- Weight: 2.5kg (5.5lbs)
- Five year warranty
