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4 element APO telescope with field correction
This Quadruplet Astrograph 65mm offers a highly corrected focal plane for astro photography . It is fine crafted and optimal for mobile deep-sky imaging featuring a minimum mechanical length of 340 mm. Image quality on- and off axis is perfect and the very low chromatic abberation allows a visual magnification range up to 150x.
Specifications:
- Aperture: 65mm
- Focal length: 420mm
- Photographic speed: f/6.5
- Diameter of the corrected field: 44mm
- Weight: 2.8 kgs (with tube rings)
- Focuser: 2" RP with improved bearing, 360° rotation.
- Resolution: 1.78 arc seconds
- Limiting visual stellar magnitude: 11m6
Advantages
- fully corrected triplet lens group for colour-free imaging
- FPL 53
- integrated field flattener (4th lens) for a corrected fiels up to full-size sensors
- optimized flattener position inside the tube for best effect
- 2" dual speed focuser for high loads - no slipping, no shifting
- 360° rotation possibilitiy for ideal framing
- CNC tube rings
