Hi all

I've just bought a Meopta Opemus Student from eBay, and found that it comes with glass inserts for 6x6. I want to buy the glassless 35mm insert and unfortunately the UK importer lists different ones for the Opemus 6, the Opemus 7, but not the Opemus Student. Any ideas on how I can tell which one I need?

Many thanks