Question 1

This one or the efs 10-22?

Accepted Answer

I have both and prefer the 10-18 for its IS and lower weight; the 10-22 sits unused since I got it.

Question 2

Will this lens work on a Canon Rebel EOS t3i? Thank you.

Accepted Answer

This is an older question but I feel this info is important so I am posting an answer anyway...Yes, your camera can use all EF and EF-S lenses.  Keep in mind that this is what is known as an Ultra-Wide angle lens (UWA).  If you are not familiar with this type of lens, I suggest that you do some reading on the best ways to use one.  Here are some general tips just in case…1.	Distortion effect – UWA have a special way of bending light from a large element down to the sensor, which results in barrel distortion.  The easiest way to describe this is that is has a funhouse mirror effect.  Near objects will appear very large, far object will seem to shrink.  If you understand how this works, you can use it to creative effect.  Some of the negative reviews for the 10-18mm and the 10-22mm are from people that clearly did not understand this.2.	Specific purpose – UWA lenses are made with a specific purpose in mind.  They excel at taking in broad landscapes, buildings, large machinery, etc.  They are not good at portraits or general photography.  They are meant to compliment other lenses, not serve as a main lens (unless that stuff is all you shoot, which is not common).  3.	Get up close – probably the worst thing you can do with a UWA is not get close enough to what you are shooting.  I prefer to place something in the foreground whenever I can, something to take advantages of that barrel distortion, to give a sense of depth in the shot.  If you don’t do this, then you end up with a picture where everything looks too small and really far away.  It takes some practice to get good at composing with a UWA.  For more info, I have a review of this lens that not only discusses its strengths and weaknesses; it also gives some reasons why it is almost always the best choice for a wide lens on APS-C cameras like yours.  This includes a comparison to the 10-22mm that is also popular, but is also more than twice the price.  You can find the review in my profile, if you are interested.  The gist of it is that this is a really good lens for the money, and a lot fun to use if you understand its purpose.  Have fun!

Question 3

what is the equivalent in 35mm?

Accepted Answer

This lens has a comparable focal length of 16 - 28.8mm in a 35mm equivalent. If you have any further questions or concerns, please don't hesitate to contact our sales department at 800-991-3350 EST. We thank you for your time and consideration!

Question 4

Is this a plastic housing and lens? Or is it metal / glass?

Accepted Answer

The lens elements are glass, and pretty good glass at that.  The housing and even the mount are made from plastic.  The mount is polycarbonate, a nearly indestructible plastic.  The lens is so light I doubt it will ever make any difference; to break it you would have to do something that would also break your camera.

If you would like to see a comparison between these two lenses, I have a review for the lens on my profile. It gives the pros and cons, offers advice for how to use the lens best, and also does the breakdown with the 10-22mm. Here is a link. https://www.amazon.com/gp/customer-reviews/R3PCTW2FIAWS7W?ref=pf_ov_at_pdctrvw_srp

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CanonEF-S 10-18mm f/4.5-5.6 IS STM Lens

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