The COMPONON-S is the first choice when image quality can not be compromised. It is a versatile design and may be used to make enlargements in the 2x to 20 magnification range.
RobC, if you have no information you shouldn't guess. Knowing nothing and knowing that you know nothing is much preferable to knowing something that isn't so.
I thought the OP mentioned a plain Rogonar, not a Rogonar-S. I don't have R'stock literature ready to hand, recall vaguely that plain Rogonars are triplets. Could be mistaken.
Oh and my bet is that you don't know what you're talking about. This is a 135mm lens and not a 50mm lens. 10X means approx 50 inch print.
This thread has been a telling experience. NOT ONE of you has offered to buy them. THAT says plenty.
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