Steph, I have a secret, well not really, but sometimes I go the cheap easy way for all my lenses. The hard part of this finding a 42mm slip on Series VI adaptor ring. I have one and a Series VI hood, and Series VI filters. So, what is the easy part? The 42mm slip on filter will fit all of my 39mm filter ring Lieca lenses, it fits all Canon 40mm filter ring lenses, throw in all of the Sonnars and FSU 40.5 lenses.... That is one hood and filter set for a whole bunch of lenses. The inexpensive Kodak Chrome hood is shallow enough to use on 35mm lenses, it worked fine with the Canon 35/2. There are some hoods on ebay right now. I didn't see any 42mm slip on adaptor rings, but there is one seller with a bunch of screw on adaptor rings, he listed 40mm and 40.5 ones. Old series VI filters are cheap too. So there you go, this my one stop hood/filter stop when I want a hood to fit all the lenses in my bag.