hi those are my dads all of them has minor fungi growth. i'd like to clean them out asap before they get worse. anyone knows how much they were? they are 10 yrs old. http://www.flickr.com/photos/22184475@N07/?saved=1 the big 300mm one has "canon ef 300mm 1:4 L IS" on it. not sure what it means though. thanks.