William Optics FLT98 98mm f/6.3 Triplet Apo Refractor w/ 2" 0.8x Adjustable Reducer / Field Flattener 4 & RotoLock Adapter

Our Price: $2,298.00
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Out of Stock
Availability: Item has been discontinued by the manufacturer
Manufacturer SKU: A-F98-RL
Item Can Ship: To US & some countries. Please contact us.
William Optics FLT98 98mm f/6.3 Triplet Apo Refractor w/ 2" 0.8x Adjustable Reducer / Field Flattener 4 & RotoLock Adapter

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Quick Overview

  • Sky & Telescope Hot Product 2010
  • Beautifully finished aluminium OTA with white powder coat and gold trim
  • Air Spaced STM coated APO Triplet Lens designed by A. Starkhov
  • Includes William Optics Revolutionary New 2" 0.8x Reducer/Field Flattener ($298 value)
  • Includes William Optics High Quality Nylon Carrying Case ($150 value)

Product Details

Bundle: William Optics FLT98 f/6.3 Triplet APO Refractor Telescope with 2" 0.8x Reducer/Field Flattener

The pre-DDG version was reviewed in the Sky at Night (December 2008) astronomy magazine with great acclaim! The DDG focuser version of this same scope was a Sky & Telescope Hot Product in 2010!

Sky and Telescope Hot Product 2010

Read about the FLT98 in Sky & Telescope (PDF Format 3.14 MB)

The FLT98 is a portable, high quality, versatile APO telescope designed for individuals who want a very high quality instrument in a relatively compact package. This model features a patented dual speed 3.5" R&P Focuser.

This telescope features a Russian-designed air-spaced triplet f/6.3 lens in an adjustable lens cell. The optics are of superb quality with amazing clarity and color correction. With stylish and unique mechanics, top-quality optics, and no chromatic aberration (true apochromatic performance), this is an excellent grab and go scope that any astronomer should own. This refractor is indeed in a new realm of mechanical technology advances and optical perfection!

The redesigned telescope features a new aluminum tube with William Optics' renowned quality fit and finish: Gold signature dew shield cover, retractable dew shield, draw tube graduated scale imprinted, larger extra-smooth (3.5") focuser, a well padded soft case, a dovetail rail, and pair of high quality mounting rings. This set-up will be a treat to use for astrophotography!

Stunning Optics

  • Features a top-quality triplet f/6.3 air-spaced objective, one of the best WO has ever made!
  • This scope is extremely sharp and has great color correction. It is ideal for astrophotography.
  • Precision optics with STM coatings.
  • Designed by a leading Russian designer with FPL-53 glass.
William Optics FLT98 Stunning Optics
William Optics FLT98 Stunning Optics


  • Extra-smooth 3.5" focuser: a treat to use during astrophotography. No more image shift.
  • Two locking screws.
  • 360 deg. rotatable.
  • Extra-heavy duty.
  • Stainless steel reinforcement inserts on both sides and on the back to allow heavy loading without problems.
  • Graduated scale for precise camera alignment.
  • New RotoLock Visual Back Adapter

Simply Beautiful Finish

  • Solid CNC-machined mounting rings and Vixen-style dovetail rail included in the price.
  • Pure William Optics quality fit and finish: powder-painted white CNC-machined aluminum tube, golden finish, retractable dewshield, anodized 360 deg. rotatatable crayford focuser, dewshield cap.
William Optics FLT98 Stunning Optics
William Optics FLT98 Stunning Optics

Total Quality Package

  • Dedicated field flattener.
  • 2" and 1.25" adapters included, all with brass anti-marring compression rings.
  • All with brass anti-marring compression rings.

High Quality Soft Case

  • Stow away your telescope in the practical and safe soft padded case (included).
  • Though you will never need it, you have a 2-year warranty from WO, and the certainty that we will be there to assist you even beyond that, if you need!
William Optics FLT98 Stunning Optics

Useful Resources

Manufacturer William Optics
Aperture 98mm
Focal Ratio F/6.3
Focal Length 618 mm
Objective Type Air-Spaced Triplet Apochromatic objective
Lens Shade Retractable
Linear Focuser 3.5" 360° Rotating Camera-angle Adjuster
1.25" Adapter Included
1.25" Adapter Provided
Type of Mount Mounting Rings
Tube Length 513 mm Fully Retracted
600 mm Fully Extended
Tube Type New Aluminum Tube
Case Heavy Duty Padded Soft Case