Hi Chris, I'm a professional photographer and have retired from that line of work.
I have two high end Cannon and Nikon SLR's and lenses.
There is NO market for them unless you want very little for it or if it's a collector's item................which mine are not.
The only use is the lenses that may (that's ''may'') be compatible with some of the new DSLR's or can be used in front of some of the astro cams out there with suitable adaptors.
I've got my money back on this gear 20 times over in a part time application so I don't really care about the worthlesness of it all.
But hey!..............good lenses are ''good lenses'' ,so, they will be retained.
Film is Film......................and brother!................when used in a cooled Schmidt camera from the golden Celestron days, the results can surpass even the best astro cams
