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I know that the SC has a square rail I’m not sure about the 810N maybe the rail is different?

I have both 4X5 and 8X10 Cambo SC and I can use the same lensboard on both.

I bought the Orvis online, I liked it very much so I went down to my local fly fishing shop to get another one and saw the one made by Fishpond they call it the Stowaway Reel Case, I thought the...

Why not look at the Gowlandflex, http://www.petergowland.com/camera/
Its a twinlens 4x5 that can be hand held weighs 5 lbs and take lenses from 180mm to 300 mm.