Currency: EUR

FOT-86 Apochromatic Refractor

Founder Optics

Founder Optics FOT-86 Apochromatic Refractor

1 599,00
Estimated delivery time 3-18 days

Product description

Excellent optics:

Founder Optics' powerful apochromats were designed by Japanese optical designers and manufactured or adjusted with high precision with Long Perng by a well-known and reliable manufacturer of optical parts in Taiwan. Glass combinations of an FPL-53 lens, an FPL-51 lens, and a lanthanum lens excellently correct chromatic aberration and spherical aberration. These triplets with high refractive index and large distances between the individual lenses, as you also use other Japanese optics manufacturers, ensure high contrast and good image quality.

Many strengths:

The FOT-86 Triplet Refractor from Founder Optics has an aperture of 86mm and a focal length of 560mm. It is characterized by its versatility and transportability. The refractor delivers excellent visual experiences and is the ideal telescope to always have with you, especially when traveling. However, the FOT-86 with its short focal length can also be used ideally for astrophotography and can fully exploit its strengths of a large field of view in combination with excellent color correction. With a weight of only 4.4 kg, the device can also be easily supported by small mounts.

Included in delivery:

The telescope comes in a foam-lined aluminum case. In addition to the refractor with aluminum tube clamps with a carrying handle and GP dovetail rail, as well as a shoe for holding a viewfinder. It is particularly noteworthy that the manufacturer also included a suitable 1.0x flattener with M48 thread optimized for the system. So if you want to start directly into photography, you are well equipped with a Founder Optics apochromatic. The overall package is rounded off by the rotatable and patented 2" rack and pinion pull-out with coupling bearings in hybrid style, including a 1:10 reduction ratio with a load capacity of up to 8Kg. The accessories are accommodated via integrated and practical 2-inch and 1.25-inch ring clamp systems.

High manufacturing quality:

The high-quality precision optics also require a stable tube. This is completely CNC manufactured in the FOT series and has a retractable dew cap. The double tube clamps come with a handle and additional screw holes to attach further accessories. The tube is painted in a noble high-gloss black and contrasted with green rings and pipe clamps. The sturdy hybrid focuser is completely rotatable, which is particularly important for astrophotographers, and has a pull-out clamp. Inside, the tube has a finely fluted matt lacquer to exclude light reflections. It is particularly noteworthy that the FOT apochromats are generally delivered including ronchitest and star test protocol.


  • Aperture: 86 mm
  • Focal length: 560 mm
  • Aperture ratio: f/6.5
  • Optical construction: Triplet, with two ED lenses (FPL53 & FPL51 glass) and one lanthanum lens
  • Lens coating: Fully multi-coated
  • Tube material: Aluminum
  • Focuser: 2" rack and pinion hybrid focuser, Dual Speed 1:10 fine focus, patented
  • Accessories: transport case, pipe clamps, GP dovetail bar, viewfinder shoe, pull-out, 1.0x flattener with M48 thread
  • tube weight: 4.4 kg

Product details



Opening (mm)86
Focal length (mm)560
Aperture ratio (f/)6,5
Resolution (arc seconds)1,34
Limit size (mag)12,2
maximum useful enlargement (-fold)172
Tube diameter (mm)110
Tube constructionFull tube
Light-gathering capacity (-fold one 7mm pupil)151
Lens DesignTriplet


DesignHybrid rack
Connector (eyepiece side) (inch)2 and 1.25 inches
Reduction1:10 Fine drive
Adjustment range (mm)95
Ring clampingyes with Click Lock System


GoTo Controlno
Mount typewithout mount

Included accessories

Eyepiece adapter1,25″ & 2″
Pipe clampsYes with a carrying handle
Viewfinder shoeVixen/Skywatcher Level
Dovetail barVixen Style
Proofreaderyes 1,0x Flattener
Transport caseyes
Test reportyes star test and Ronchitest


Length (mm)465
Total weight (kg)4,4

Shipping costs

15,90 €
European delivery 2-5 days.
PostNord Parcel locker
5,90 €
PostNord Home deliver
19,00 €
Environmentally friendly delivery to your door at the agreed time. Trackable deliveries in real time even in the evenings in the biggest cities. Change your delivery as required.
UPS Standard
14,90 €
Delivery to Europe in 2 to 5 days.
5,90 €
12,90 €















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