Hi Ginette,
lens stage measures 88 mm, that should be Unipla´s diameter too. Look at the photo L54 (down) and IM in the link.
I have never seen this Instruction Manual in english:
http://www.aphog.de/wp-content/downl...sanleitung.pdf
Look at page 5.and a picture of L54. Reference numbers 13 and 14. You can see, in the middle, lens; then black "Lapla"; number 13, a bright ring (which is a missing part), black part removable turret? in the hole of bellows.(lens stage).
Look the photo: Inside diameter is 88 mm, then a missing part, Laplas 78 mm outside diameter.
Hope this is clear enough
Best Regards, Risto
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