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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 PLUS the more compact and lightweight 107mm apochromatic refractor on the market, very easy to transport!
Borg fluorite apochromatic refractor 107FL f3.9 PLUS comes with Feather Touch focuser that offers high load capacity, great focusing precision (thanks to a convenient 1:10 fine focus knob) without backlash: this is the perfect focuser for our SESTO SENSO robotic focusing motor! 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.
Borg fluorite apochromatic refractor 107FL f3.9 PLUS (left) compared with Takahashi FSQ-106, Pentax 100SDUFII and Takahashi FSQ-130
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 PLUS. 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 PLUS 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 EAGLE installed on the PLUS rings. Above the EAGLE the 60mm CompactGuide scope with PLUS 80mm guide rings is installed.
Borg fluorite apochromatic refractor 107FL f3.9 PLUS optical tube
115mm PLUS rings
Feather Touch 3" focuser with 1:10 fine focus knob
M57 manual rotator
Padded carrying bag
Borg fluorite apochromatic refractor 107FL f3.9 PLUS with padded carrying bag. The bag is compact (54 x 26 x 18 cm) but it still have more space available for example for other accessories, like the EAGLE installed above the rings.
|Optics||6 elements apochromat|
|Focal Length (mm)||417mm|
|Field flattener/corrector||Included and removable|
|Focuser||FeatherTouch 3" micrometrico|
|Hard/soft case||Soft case|
Lightweight and very well done. Great scope so far.