William Optics

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Overview

William Optics is a Taiwanese manufacturer specializing in refractor telescopes, particularly portable short-tube apochromatic models for visual astronomy and astrophotography, along with accessories such as diagonals, flatteners, and focusers.²⁴⁵ The company targets amateur and advanced users with products emphasizing low chromatic aberration, wide-field imaging, and affordability.³⁵⁷

History

William Optics was founded in 1996 by brothers William and David Yang, initially as Optical Technology Limited, with the aim of producing high-quality refractor telescopes for demanding amateur astronomers.³⁴ The company is based in Taiwan, where it conducts optical production, and has expanded with overseas offices and distributors including in Australia and the USA.¹³ It has grown into a global player known for portable refractors and accessories.⁴

Product Lines

Product Line	Positioning	Price Range
Short-Tube Refractors	Portable apochromatic telescopes for astrophotography	$800 - $3,000
APO Refractors	High-contrast triplet optics for visual and imaging	$500 - $2,500
Gran Turismo Series	Compact wide-field astrophotography telescopes	$1,200 - $2,000
Septuplet APO Refractors	Large-aperture imaging telescopes with internal focus	$2,500 - $5,000
Accessories (Diagonals, Flatteners)	Precision optical components for telescope setups	$150 - $800
Eyepieces and Focusers	User-oriented upgrades for refractor systems	$100 - $600

Manufacturing

Products are manufactured in Taiwan, with optical production based in Taipei or nearby facilities.²³ The company handles in-house design and production of telescopes and optics.³⁴

Notable Products

Gran Turismo 81 - 81mm apochromatic triplet refractor with 478mm focal length, optimized for wide-field astrophotography with low chromatic aberration.⁵
Septuplet APO Refractor - Portable large-aperture telescope with seven lenses, internal focus, and fixed body for stability in imaging.⁵
WO Diagonals - Popular high-quality diagonals used in refractor setups for visual observation.⁴
Flat6AIII Field Flattener - Reducer/flattener accessory for even illumination in astrophotography.⁵

Reputation

William Optics is regarded by astronomers for producing affordable, high-quality apochromatic refractors with sharp optics and minimal chromatic aberration, appealing to both visual observers and astrophotographers.⁴⁵ Enthusiasts praise the innovative designs like internal focusers and flatteners, though some note higher price points compared to mass-market brands.⁵ Professionals value the portability and wide-field performance in amateur setups.³⁷

Sources (7)