[ATM] Lens after diagonal?

[GARY FUCHS <gary@rcn.com>]

Hello,

I've been considering (from a perspective of almost no 
knowledge) the problem of minimizing the secondary 
obstruction in a standard Newtonian design. Could the 
following work:

Place a lens immediately alongside a much smaller than usual 
diagonal so that the cone of light, hitting the diagonal at 
appproximately focus, would be refocused to a point 
comfortably outside the tube.

If this wouldn't work - and I mean "work" in a practical, do-
able, giving comparable results to the standard methods, way, 
why not?

Thank you,

Gary Fuchs
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