The UL-599 is a universal mounting block on the Ultima 35 for DSLR cameras that are not listed with dedicated mounting blocks.
The height is adjustable and the position of the tripod mount is adjustable, so that for most DSLR bodies a proper position can be found.
This enables the use of for instance Canon's 40D, 50D, Nikon D70, D80, D90. D300, D700 and so without Battery Grips.
There is no use for an L-bracket in this setup, so only landscape positions is achievable.
Please note that a UL-Bellows with the proper bayonet needs to be added.