SmallHD's 501 field monitor is the lower-priced alternative to their popular 502 series model. With the only difference being a lack of SDI ports, the 501 offers a crisp, 1080P panel with all the necessary monitoring tools (including 3D LUT support) integrated within a simplistic and well-organized UI.
While the 501 retails for $899 normally, B&H Photo has chosen this product as its ‘Deal Zone' promotion thus discounting the price by $300 although this sale is valid for today only (12/7/15). Anyone who has been eyeing this monitor for use monitoring video on a DSLR, mirrorless or cinema camera can scoop up the 501 today for $599 which is probably the lowest price it'll go for in the foreseeable future.
For full specs or further details on the SmallHD 501 Deal Zone promotion, visit the B&H Photo website.