Canon's patent reveals a lens design with a drop-in teleconverter slot, adding extender functionality without increasing overall lens length. #canon #teleconverter

a few more New-in-Used #Nikon bit, before I turn in for the night! :) Here's a #Nikkor #MirrorLens, a manual-focus #teleconverter, a pin-drive AF 24/2.8, and a #NikonD90!