Largest Amateur Scopes (40+ inches)

(homebuilt, including grinding the primary)

Fabio Marioni's 40" scope (2016) 24mm thick meniscus F5 mirror http://fabiomarioni.blogspot.it/

Project40 40" scope (2015) https://project40.wordpress.com/

Chris Fuld 41" scope (2007) http://chrisfuld.blogspot.com/2008/11/my-big-telescope.html

Dan Bakken 42" (2004, 2007) http://wonderfuluniverse.com/telescope_newherc1.htm

Steve Swayze 40" (1994) http://www.swayzeoptical.com/photo/40inchgm.jpg

(homebuilt, commercial mirror)

DARC Sky 50" (2014) Fullum primary, http://www.cloudynights.com/topic/483900-very-large-dobsonien/

Mike Clements 70" (2013), http://www.dailymail.co.uk/news/article-2487485/Utah-truckdriver-builds-worlds-largest-amateur-telescope.html

Howard Royster, George Loyer 40" alt-alt telescope (2012) https://www.flickr.com/photos/27241501@N03/sets/72157628920691263/

Robert Houdart 43" (2008+) http://www.cruxis.com/scope/scope1100.htm

Frederick Gea 40" (2007) http://www.astrosurf.com/altaz/T1000.html

Dr. Erhard Hänssgen 42" (2003) http://www.cruxis.com/scope/scope1070.htm

ADIA (Frédéric Géa, ADIA and David Vernet) (1993+) http://www.astrosurf.com/altaz/1000_e.htm

Group70 70" (not portable) (1988+) http://www.group70.org/

(commercially built scope and mirror)

El Camino College 42" CDK (not portable?) (2012) http://www.elcamino.edu/academics/naturalsciences/astronomy/glass42.asp

50" Astronomical Research Observatory, Westfield, IL (2011) http://www.astro-research.org/observatory_phase4.htm

Orion Telescope 36-50" commercial (2010) (Norman Fullum) http://www.telescope.com/Orion-50-Monster-Dobsonian-Telescope/p/9162.uts, http://www.normandfullumtelescope.com/

OMI/Lowrey 48" 'Barbarella' (2007) https://astronomytechnologytoday.com/pdfs/files/June08-june%2008%20cover%20OMI%2030-41.pdf

eod