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  • Borg fluorite apochromatic refractor 90FL f3.9 PLUS Borg fluorite apochromatic refractor 90FL f3.9 PLUS

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for order at least €250

Borg fluorite apochromatic refractor 90FL f3.9 PLUS

Product code: BORG90FTF39

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Quick Overview

Borg fluorite apochromatic refractor 90FL f3.9 PLUS, 90mm diameter, 350mm focal length (f3.9), 6 elements fluorite apochromat, carbon fiber tube with 3 inches Feather Touch focuser with fine focus knob, rear thread for camera connection, PLUS support rings. In the picture, the Borg 90FL f3.9 PLUS is shown with optional Vixen and Losmandy style PLUS dovetail bars.

Availability: Available

Order €4,950.00
22% tax incl
if you pay by bank transfer €4,801.50

Details

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 90FL f3.9 PLUS the more compact and lightweight 90mm apochromatic refractor on the market, very easy to transport!

Borg fluorite apochromatic refractor 90FL f3.9 PLUS

Borg fluorite apochromatic refractor 90FL 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 M57 thread to connect cameras by adding the proper photographic adapter.

Borg fluorite apochromatic refractor 90FL f3.9 PLUS

Forget about the uncomfortable and weak support rings that are often found in cheap telescopes! Borg fluorite apochromatic refractor 90FL 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 90FL f3.9 PLUS

 

Borg fluorite apochromatic refractor 90FL f3.9 PLUS: scope of delivery

Borg fluorite apochromatic refractor 90FL f3.9 PLUS optical tube
115mm PLUS rings
Feather Touch 3" focuser with 1:10 fine focus knob
M57 manual rotator
Padded carrying bag

Technical specifications

Optical Design Apochromat
Optics 6 elements apochromat
Diameter (mm) 90mm
Tube diameter No
Focal Length (mm) 350mm
Focal Ratio 3.9
Field flattener/corrector Included and removable
Optical Tube Carbonio
Obstruction No
Focuser FeatherTouch 3" micrometrico
Eyepiece holder No
Weight 2,5 Kg
Hard/soft case No

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