[Histonet] Imaging Histological Specimens

[Hector Mobine]

Hi Netters, 
	I've been put in charge of finding a lens for our Nikon D70 that can
be used to image histological specimens (fixed rat hearts and organs mainly)
after paraffin-embedding and for imaging during surgery. I was told a 60mm
Nikon Macro lens would work well, but am concerned that it may need to be
placed too close to the subject during surgery violating the sterile
requirements. Anyone have experience with lenses that could help me out?

Thank you in advance. 

Hector Mobine