He’s restored many a telescope

Of course Mark also collected and restored a large collection of instruments manufactured by the Hysom brothers’ firm AE between the 1960s and 80s. This included a 10″ Relay-lens Dall-Kirkham Cassegrain that I used to use (I described this instrument in JBAA 2007 April) that was also reputedly part-made by Dall. I don’t know if he still has this curious collection.