DIY focuser design - ATM, Optics and DIY Forum - Cloudy Nights
Stellafane The Focuser
2inch Diy Refractive Focuser With Rack Full Metal Refractive Astronomical Telescope Focuser With 2inch To 1.25inch Adapter - Double Helical Focuser - AliExpress
A Homemade Crayford Focuser
70mm Astronomical Telescope Focuser Use For DIY Refracting Astronomical Telescope For 75mm Outer Diameter Mirror Tube - AliExpress
Homage to Homemade Crayford Focusers - ATM, Optics and DIY Forum - Cloudy Nights