Under the right conditions, weak fog structures (e.g. cirrus) can be seen visually. These optics already collect 50% more light than a 4-inch model. We decided on a short system with f/6 in order to give the astrophotographer a powerful tool. Both highly corrected f/4.5 photo systems and "planet killer" with f/9 to f/12 can be implemented without any problems.
Since "fast" openings require maximum focus precision, especially for photography, we have installed the large 3.5 "FeatherTouch focuser with 360 ° rotation and 1:10 micro-reduction. It guarantees freedom from vignetting and can be effectively equipped with all possible accessories. The massive construction allows the use of heavy additional equipment.
If you need a shorter or longer back focus, you can specify this when planning, and the aperture system can be optimized without any problems.
The total weight increases slightly to approx. 9kg due to the more massive focuser.
Scope of delivery:
• Optical lightweight CNC tube with movable dew cap
• Set of CNC clamps
• 3.5 "Starlight focuser with mounted 50 mm finder bracket, both rotatable through 360 °
• Reducing adapter 3.5 "/ 2"
• Extension 2 "-80 mm
• Adapter 2 "/1.25" with brass clamping ring
• Test protocol
• Covers on both sides