This compendium (like accordion) adjustable lens shade was made for the Calumet C1. I may have the mounting block for it as well. The block is only useful if you happen to own a C1. If you don't own a Calumet C1, this shade can still be rigged to work on many 8x10 cameras. It's about a 6" square bellows shade. Photos on request. $25.
Thanks
Neal Wilson