(See more at http://sites.netscape.net/k3halpha/halpha2.html)
Telescope: 140mm; the long focus objective is a single lens biconvex, made of pyrex with a FL of 2800mm
The mechanical support is a computer printer carrier. Their structure was made of wood. A 2x barlow gives about 5.6 meters FL; The spectroheliograph diaphrams in the sunlight path to prime focus at the Manning synthesizer
West view: The black box (A) contains the difraction grating
The black tubes (B) is the collimator
The white box (C) contains the control electronics for oscillating slits and the coelostat.
The instrument is supported by walls (D)