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William Optics FLT98 3.5" Focuser With Rotolock

RM 11,500.00

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William Optics FLT98 3.5" Focuser With Rotolock

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 an dual speed 3.5" R&P focuser and features William Optics' latest RotoLock Visual Back.

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") R&P focuser, RotoLock 2" visual back, 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!

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!

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.

Strong Focuser

- Extra-smooth 3.5" R&P focuser: a treat to use during astrophotography. No more image shift.
- RotoLock visual back securely locks and centers your diagonal or camera.
- 360 deg. rotatable.
- Large aluminum knobs.
- Extra-heavy duty.

Patented Design

- Stainless steel reinforcement inserts on both sides and on the back to allow heavy loading without problems.
- Graduated scale for precise camera alignment.

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.

Total Quality Package

- Dedicated field flattener available separately.
- 1.25" adapter included.

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!


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

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