OK, this is about the most NEWB question ever posted here, but.....
Do RB67 180mm Sekor C lenses have rear elements?
I bought my 180mm Sekor C for my RB67 Pro-S some months ago, but haven't been able to do anything w/my RB Kit until recently (put new light seals in).
As i was looking things over, i noticed on my lens that there was no glass in the rear-element area - i could simply touch the apeture blades if i so desired. I'm sorta panicking....
Did i get ripped off?