Issue with new Sigma 30mm EX

Iv just got hold of a brand new sigma 30mm, but when using MF... the focus wheel keeps on going until you literally stop turning.

Does anyone else have this issue

Well when I rotate the manual focus ring on mine I feel roughness (normal) untill I reach the end, then I can continue rotating but the roughness is gone. Is that what is happening to you too? because it is normal.

That is true with ANY HSM/USM motor lens. Don't worry about it (and don't keep turning past the natural stop where the ring get's slightly harder to turn...it won't necessarily hurt the lens, but I don't think it's all that great for it either.)

Ahh ok, however another thing that is bothering me... sometimes i switch from MF to AF and it sust will not AF until i reboot my 7D? Only does it with the 30mm :S

the MF/AF switch works fine on my 7d

It's supposed to do that. there is some friction between the mechanism that moves the elements and the ring... it's designed to not spin in place when the AF motor is driven, so it has to have some "play"

Canon lenses do the same.

Mine does always work immediatly when I use te AF-switch.

Iv been on to sigma this afternoon anyways... gonna have it sent in to be corrected! So hopefully not all is lost lol