Art, yes, you're right about the shade for the 50 Summilux holding the Series 7 filters in place. With regard to the 135, I've decided against getting the Series 7 --> 55mm step-up ring, for the simple reason that, as I suspected and as confirmed by something I found on photo.net, it would prevent me from extending the built-in lens hood. So, I know the Series 7 Leica lockring and Leica filters can be found on eBay and other places. But are the filters coated? Considering how long ago Leica moved away from series filters for the R lenses, maybe they aren't more than monocoated. Does B+W or anyone else make multicoated series filters? Thanks. Nick ------------------------------------------------------------------------------ NOTICE: The information contained in this electronic mail message is confidential and intended only for certain recipients. If you are not an intended recipient, you are hereby notified that any disclosure, reproduction, distribution or other use of this communication and any attachments is strictly prohibited. If you have received this communication in error, please notify the sender by reply transmission and delete the message without copying or disclosing it. ==============================================================================