John Wall
John Wall
Born	(1932-06-26)26 June 1932 Crayford, Kent, England
Died	27 January 2018(2018-01-27) (aged 85) Coventry, Warwickshire, England
Occupation	Engineer
Engineering career
Significant design	Crayford focuser
Significant advance	dialyte based refracting telescopes

John Wall (26 June 1932 – 27 January 2018)^[1][2] was an English design engineer, amateur astronomer, and amateur telescope maker. He was a member of the British Astronomical Association until his death in 2018. He was known for designing dialyte based refracting telescopes, coming up with the Zerochromat.^[3]

Wall died on 27 January 2018 in Coventry, Warwickshire at the age of 85.

• A New Refractor Concept: "The Wall Hypochromatic Refractor"
• The John Wall 30-inch refractor. Archived 2016-03-04 at the Wayback Machine
• The Crayford eyepiece mounting by John Wall - Journal of the British Astronomical Association, 81 (2), 118, February 1971 Archived 2013-01-13 at Archive.today
• Crayford focusers
• Crayford Eyepiece Mount Archived 2009-08-05 at the Wayback Machine
• astronomics.com's description of how the Crayford Focuser works Archived 2007-10-10 at the Wayback Machine

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