Bought this to update my lens to the latest firmware which has speeded up the focussing. Next step will be to configure focus to be biting sharp so that it matches up my camera.
Verified purchase: Yes | Condition: New
Its an alright feature offered by sigma, avoids having to spend time and money sending back their purposely out of focus lens but is it really worth £40? im not saying i know everything but this seems like a cheap lens cap with a simple lens contact to usb conversion...i do understand they did not include it with every purchase of a sigma lens to reduce costs but selling them separately for £40, really? i really hope the price comes down for the sake of everyone's sanity. The software is okay but what are the adjustable units measuring?!?!? also its really annoying having to wait for it search for updates every single time i connect my lens, an option to turn it off would be nice.
Verified purchase: Yes | Condition: New
Works well with the downloaded software from Sigma. Takes time and patience to set up the lenses correctly but well worth the effort.
Verified purchase: Yes | Condition: Pre-owned
It connects lens to computer and via software allows to change AF settings and other parameters. Does what it's intended for, works fast, no lags.
Verified purchase: Yes | Condition: New
instructions on line are for experts so hard to follow. but item is a good solid make.
Verified purchase: Yes | Condition: New
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