On 09/05/2012 20:19, Tom Del Rosso wrote:
Jim Thompson wrote:

Full knock-down...

http://www.analog-innovations.com/SE..._KnockDown.pdf

They don't make them like that anymore.

Maybe an astronomy club would want those lenses.

They would be nothing like diffraction limited or monochromatic so the
best bet is to donate them to the scouts for fire starting with the sun.

--
Regards,
Martin Brown