Lens designations (Nikon related)

johnnyguitar

johnnyguitar

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I have a D40 - it does me fine while I am learning.
I want to get another couple of lenses - I like my 18-55 kit lens, but want a wider aperture, say f2.8, for starters. I have seen the Nikon version but it's out of my price range and have seen an equivalent(ish) Sigma HSM 18-50 lens for a lot less. To get AF I need to buy the Sigma version of AF-s (which is HSM, right?). What do the other makers, like Tamron, use as codes or designations to identify their lenses with Focus motors?

Ta
 
Yes you can use a Nikon AF-S or AF-I lens and the Nikon fit Sigma HSM lenses are the equivalent to this so work fine. Form what people tell me Tamrons equivalent is quite slow. I have never used them though.
 
Normally yes, but not always. Sigma also gets some lens with motor built in for Nikon f-mount but not HSM.

HSM means hyper sonic motor, which is better than normal motor. Just like SWM silent wave motor.

There is no special name for Tamron lens or Tokina lens. But they also get some lens with motor built in. Ask the seller about it.
 
If you're after a similar focal length but with a f/2.8 max aperture consider the Tamron 17-50mm; just bought one the other day off fleabay (used but mint condition for £160) and I have to say that it's as good as anything I could have paid three times the amount for. A small, compact lens - the same size as a NAF 18-70mm - but it's beautifully sharp and has great bokeh at f/2.8. Oh, and it has a 67mm front element so filters aren't as expensive.

Took this with it the other day...

 
Thanks longlyogre/Zilog/specialman
Zilog thalnks for the link, that's a useful page - I found it yesterday but it's helpful for everybody else looking for the same sort of info.

The Tamron looks like it could also be a contender - does it have a built in focus motor? I know I could MF, but it's nice to have the functionality to AF
 
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