LaughBrian Loc: Tn

Hi, I have the CANON T4i with the 18-135 is stm kit lens, But i have noticed that it does not say stm anywhere on the lens. Did best buy rip me off? looked on the web cant find a good pic of that shows all sides and what writen on them. Does anyone know if it should say it on the lens and where it should be?
Thanks

St3v3M Loc: 35,000 feet

There are two versions of the Canon EF-S 18-135mm lens

Canon EF-S 18-135mm f/3.5-5.6 IS http://www.usa.canon.com/cusa/consumer/products/cameras/ef_lens_lineup/ef_s_18_135mm_f_3_5_5_6_is
- looking at the glass it says: Canon Zoom Lens EF-S 18-135mm 1:3.5-5.6 IS

Canon EF-S 18-135mm f/3.5-5.6 IS STM http://www.usa.canon.com/cusa/consumer/products/cameras/ef_lens_lineup/ef_s_18_135mm_f_3_5_5_6_is_stm
- looking at the glass it says: Canon Zoom Lens EF-S 18-135mm 1:3.5-5.6 IS STM

LaughBrian Loc: Tn

OMG thanks so much i feel so stupid! Best buy didnt rip me off lol.
Thanks so much for the very fast reply.
PLease close this.

momma deb Loc: Northeast, Ohio

Hello, I have been looking at the Canon EF-S 18-135 f/3.5-5.6 IS STM Lens + UV + Hood + Cap, can you tell me if you like it, any advice you can give me.

LaughBrian Loc: Tn

I use it for video for the most part. it very quiet and you dont hear it at all in your movies.

momma deb Loc: Northeast, Ohio

I really don't do any movies but before I shell out the money, I want to make sure it's worth it and takes good photos. I want something between the 18-55mm IS and the 17-300mm that I have.

LaughBrian Loc: Tn

mtshooter is the guy to talk to best on this forum for answers.

cthahn

What is "stm" ?

St3v3M Loc: 35,000 feet

http://en.wikipedia.org/wiki/Canon_EF_lens_mount
- Scroll down to Stepping motor

Stepping motor

Canon EF 40mm f/2.8 STM pancake lens
Stepping motor (STM) lenses were first announced in June 2012, alongside the announcement of the EOS 650D/Rebel T4i/Kiss X6i. Three EF-S lenses and one EF lens featuring this technology are now available: the Canon EF-S 18-55mm f/3.5-5.6 IS STM, the EF-S 18–135mm f/3.5-5.6 IS STM superzoom, the EF-S 55–250mm f/4-5.6 IS STM, and the Canon EF 40mm f/2.8 STM pancake lens.
Canon claims that this technology allows smooth and silent autofocus, and with compatible bodies (the first of which is the 650D), will provide continuous autofocus in live view and video.[9] Unlike USM, STM lenses use focus-by-wire to enable full time manual mode, which means that rather than manually moving lens elements, rotating the focus ring commands the stepping motor to change focus. This means an STM lens's focus cannot be retracted by turning the focus ring while the camera is off.
Both lenses introduced with the EOS M, the EF-M 22mm pancake prime and EF-M 18–55mm zoom, also feature STM technology.[1] The most recent EF-M lens, the 11–22mm, is also an STM lens.
All stepping-motor lenses are marked with the letters "STM" on the front of the lens as part of the model designation.

jpanar Loc: Reston, VA

The EF-S lenses are of limited use. If you upgrade bodies, you probably won't be able to use that series of lenses with ‘APS-H’ or full-frame models.

gessman Loc: Colorado

There are two 18-135 IS lens as previously noted. The STM lens were designed to work with the t4i, t5i, EOS M, 70D to facilitate constant focus during video which only presently works with those listed cameras for video. The other 18-135 IS might be more what you're looking for. You would be wasting money needlessly to get the STM version of the lens. The non-STM lens is good but you might want to Google reviews and read a cross section of reviews.

Bill Emmett Loc: Bow, New Hampshire

Hi Gessman, Did you leave off the 7D in the list of cameras that would benefit from using STM lenses. Or, does the 7D not benefit from the STM designated lenses.

gessman Loc: Colorado

As I understand it, only those cameras I listed have the ability to communicate with the STM lens to provide constant focus but please confirm that for your own benefit or if you have better info than what I've offered, please let us know about it. I think the 5D?, 7D, and 60D, in order of release date, all hit the street just a little early to have that facility built in and just after the 60D hit the street the t4i came out and was the first that could talk to the STM lens. I know my 5D2 can't use the feature.