Advice for getting lens


Third party have many different abrievation though..

Tokina has at-x... Sigma has HSM and OS for it's motor and IS... Tamron has USD for it motor and VC to replace IS

so, the sigma 18-200 is meant for aps-c cameras.. So af-s is relatively the same..

HSM = Sigma's Hypersonic Motor. But it is not Sigma's only lens motor. They also had another version of their lens motor that is NOT HSM (a slower and older motor).

There is no AF-S for Sigma. AF-S is a Nikon strictly Nikon mount spec. It not just referring to Nikon's motor, but also the entire electronics spec for Nikon Lens. The wave motor in Nikon is referred to as SWM = Silent Wave Motor.

Nikon AF-S and Sigma HSM are NOT relatively the same, especially here we are talking about Canon EOS mount. Want to say something, say it accurately. If cannot, might as well don't say anything.
 

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First time I saw a Sigma with AF-S.... and it is canon mount too. :bsmilie:

Sigma AFS sound abit counterfeit I must say...:bsmilie:
actually I like how Tamron uses USD.:bsmilie: wonder if there's any SGD from any maker in near future...:D
 

Sigma AFS sound abit counterfeit I must say...:bsmilie:
actually I like how Tamron uses USD.:bsmilie: wonder if there's any SGD from any maker in near future...:D

Next time got lens use AUD, HKG and RMB. :bsmilie:
 

so, the sigma 18-200 is meant for aps-c cameras.. So af-s is relatively the same..

Sigma's equivalent is called HSM ( Hypersonic motor ). AFS is Nikon terminology

Ryan
 

Hi

I just bought a 550D with 18-55 lens found that the zoom is not enough for me. Intent to get a budget new lens with better zoom range. wondering what lens will be the best?:)

common newbie issue... :what: