Opticallimits

I reckon this is the point in time when the JP players should get nervous ... not specifically because of this lens but because it features AF

http://www.mkgrip.com/goods/show-243.html

All metal body? ........................Wow that's a step up from their plastic but not fantastic extension tubes:

Nano coating...9 elements in 6 groups......no mention of the AF motor!

Surely it will be the subject of utube videos......doubtful any lens testing site will review it.....

...unless Klaus........it might return it's initial investment........these cheapos attract a lot of interest!