195mm f1.25 lens at SurplusShed

This lens looks rather interesting: http://www.surplusshed.com/detail.cfm?ID=L13007 Can anyone guess what the coverage would be? Diameter of the lens is 155mm (6.1")

If you google around you'll come across posts in this very forum where someone has used that lens.

From what I saw and also what the owner said, it has decent central sharpness but quickly falls off. It also has a very strong field curvature.

There's also an optional rear element that they used to sell that, when combined, puts the whole setup around the 300 f/2.x mark. But then, keeping those two cells aligned would be a bit of a nightmare.

Oh... the coverage is 8x10...

Thanks, I thought this was a new listing from SurplusShed.