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Borg fluorite apochromatic refractor 107FL f3.9 with ESATTO 3"Borg
Borg fluorite apochromatic refractor 107FL f3.9 with ESATTO 3", 107mm diameter, 417mm focal length (f3.9), 6 elements fluorite apochromat with Canon lens, carbon fiber tube with 3 inches ESATTO focuser, M57 camera rotator, rear thread for camera connection, PLUS support rings. This wonderful apochromatic refractor with fluorite optics offers an incredible f3.9 focal ratio and it has a very large 55mm flat field to allow the use of cameras also equipped with very large sensors, even larger than Full Frame. The carbon tube makes the Borg fluorite 107FL f3.9 with ESATTO 3" the more compact and lightweight 107mm apochromatic refractor on the market, very easy to transport!
Borg fluorite apochromatic refractor 107FL f3.9 comes with ESATTO 3" focuser that offers high load capacity and great focusing precision: this is the perfect focuser for astrophotography! The focuser has a rear manual rotator with a M57 thread to connect cameras by adding the proper photographic adapter. Back focus from the rear M57 thread is 60mm and you can use the rotator to easily rotate the camera in order to find the best object framing.
In order to do astrophotography you can use both DSLR cameras and CCD/CMOS cooled cameras with the Borg fluorite apochromatic refractor 107FL f3.9 with ESATTO 3". The requested backfocus (the working distance from the sensor in order to have the best performance) is 60mm from the M57 thread on the rear of the rotator (if you want, you can even remove the rotator and have a M68.8 thread with a back focus of 80mm). If you want to use a DSLR camera, you need to add the 7000 photo adapter and one of the M49.8 photo adapters with the bayonet of the different DSLR cameras manufacturers. By connecting the DSLR camera with these adapters, the camera sensor will automatically be at the perfect backfocus. If you want to use a cooled CCD or CMOS camera, you need to add the M57-T2 7522 photographic adapter that converts the M57 thread in the rotator to an universal T2 male thread. From this T2 thread the backfocus will be 55mm and, since most of the cooled cameras have a lower backfocus (unless you use also filter wheels or off axis guider), you need to add a T2 extension between 7522 and the camera.
Forget about the uncomfortable and weak support rings that are often found in cheap telescopes! Borg fluorite apochromatic refractor 107FL f3.9 with ESATTO 3" comes with our PLUS (Prima Luce Universal System) rings, aluminum, made with high precision CNC machines. This gives you maximum freedom in connecting other mechanical accessories (dovetail plates, guide rings, dovetail clamps) always with simple M6 screws and with 2 screws for every element (to avoid flexures). This way you can also connect the EAGLE directory on the telescope obtaining a fantastic system for astrophotography that does not require external computers to allow you to perform great quality astrophotography!
Borg fluorite apochromatic refractor 107FL f3.9 PLUS with ESATTO, EAGLE is installed on the PLUS rings.
Above the EAGLE, the 60mm CompactGuide scope with PLUS 80mm guide rings is installed.
Thanks to the integration between the PLUS system and the complete range of Borg accessories, the 107FL f3.9 with ESATTO 3" telescope can be used at different focal lengths (allowing you maximum freedom to photograph the object you want) but it can also be used in visual. The diagram below shows the allowed configurations.
Borg fluorite apochromatic refractor 107FL f3.9 with ESATTO 3": scope of delivery
Borg fluorite apochromatic refractor 107FL f3.9 PLUS optical tube
115mm PLUS rings
ESATTO 3" focuser
M57 manual rotator
- Hard/soft case
- Support rings
- Diameter (mm)
- Optical Tube
- Focal Length (mm)
- Apocromatico a 6 elementi
- 4,9 Kg
- Eyepiece holder
- Focal Ratio
- Optical Design
- Field flattener/corrector
- Incluso e rimovibile