I have used and Ebony SV57U for several years. I was hesitant about the extra cost of the asymmetric feature but am extremely glad that I have it.
For most landscapes, I end up using some tilt and this feature makes it extremely fluid. Over time the quality of this feature and the experience of using it has far outweighed the extra cost when purchased.
I chose the 5x7 in mahogany becuase it was substantially lighter than the ebony version and just as stable/rigid/durable. My 5x7 weighs in at just about 6lbs which represents a terrific tradeoff of weight, groundglass size, negative size, camera stability, ease of use, and features.
Best Regards,
George
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