This telescope is inspected, measured and adjusted if necessary. The focuser will be optimized. On request from your telescope, you will receive a meaningful quality certificate (test protocol with star test, Ronchi, adjustment, with individual serial number)! Please specify when ordering!

Examples of our test protocols: Test records
How we adjust: About us

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William Optics 102mm Triplet APO Refractor - 4 "f / 6.9 FPL53 Lens - 2" R&P Excerpt

An excellent telescope for astrophotography and observation with an amazingly low price.
♦ FPL53 triplet lens with air gap for extremely low chromatic aberration

♦ CNC machined lens cell

♦ 2 "rack extension with reduction and 360 ° rotation option

♦ Retractable dew cap

♦ High quality finish

William 102mm triplet APO refractor - 4 "f / 6.9 FPL53 lens
The amazing William Optics GT 102 Apochromat is a gem in the world of apochromatic refractors. Despite the flawless white finish of the tube and the elegant gold trim, this beauty has much more to offer than just a good look. The GT 102 Apochromat offers a 3-element lens using high-quality FPL53 glass in combination with other special glasses, which reduces the secondary spectrum to an incredible level.

Unbeatable optical properties

♦ Three-element FPL53 air gap lens in adjustable precision CNC frame
♦ Extremely sharp with excellent color correction
♦ Each lens is fully multi-coated with a special "super-high transmission coating" (STM coating) on ​​all surfaces.
♦ f / 6.9 is great in astrophotography.

Simply beautiful finish

♦ Real William Optics quality finish: powder-coated white CNC aluminum tube with golden accents
♦ Retractable dew cap with protective cover
♦ Rack extension that can be rotated through 360 °
♦ High quality anodizing
Design: Apochromatic FPL53 triplet with air gap
Opening: 102 mm
Focal length: 703 mm
Aperture: F / 6.9
Resolving power: 1.13 arcseconds
Border Size: 13.9
Eyepiece extension: 2 "rack extension with 1/10 reduction and 360 ° rotation option
Tube diameter: 105 mm
Tube length: 689 mm with inserted dew cap
Tube weight: 5.0 kg