Dutch video experts Ekton have managed to convert the Sigma 150-600mm f/5-6.3 DG OS HSM Sports to Arri PL mount. This tour de force gives video shooters great zoom range and great reach, at a bargain cost — when put into the proper context.
Ekton charges $1,900 for the conversion, which requires heavy surgery: cutting the rear of the lens, replacing the mount and related electronics, and adjusting the back focus to achieve near-parfocal zooming. Of course this is not reversible, and the lens loses its optical stabilization feature in the process.
[Via DSLR News Shooter]