The present invention provides {TAIL ~ a single telescope} with {HEAD ~ a pair} of three mirror anastigmats which may be moved with respect to one another to provide a multiple field of view optical system 
The present invention provides { TAIL ~ a single telescope } with { HEAD ~ a pair } of three mirror anastigmats which may be moved with respect to one another to provide a multiple field of view optical system
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH