wjlapier
Well-known
I'm not sure what the bayonet size is of the baby rollei. I've seen Bay 1 adapters to accept standard threaded filters.
This one:
https://www.ebay.com/itm/Yashica-TL...hash=item3f903be817:m:mFv90SZEDabFr28IXbSpxwg
This one:
https://www.ebay.com/itm/Yashica-TL...hash=item3f903be817:m:mFv90SZEDabFr28IXbSpxwg