fetzler Loc: North West PA

A great wide angle lens for APS-C cameras in the Tamron 10-24mm. Going from 18- 16mm is nice but not game changing. I have a Nikon 16-80mm as well. It is overall my favorite lens for general photography. The 10-24 mm is great for architectural and landscapes with a nice foreground,

Julian Loc: Sarasota, FL

I would brush up on Italian, Ciao!

nadelewitz Loc: Ithaca NY

Your wide angle range fits in the range of the 18-135, except for two little millimeters. No point in carrying the extra weight or volume.
If you think you NEED wider zoom, get a lens whose range falls shorter than the 18-135. That's an expensive proposition.
Also, you don't say if you have a crop-sensor camera or full-frame. If it's crop, consider that the crop factor will negate a big chunk of the wide angle field of view, so
you may not get all the effective zoom range you expect.

regularguy55

Can’t go wrong with that...great AF system and quality lens.

dsmeltz Loc: Philadelphia

On an APS-C that would be my recommendation. The 10-20 will be useful in town and inside.

nadelewitz Loc: Ithaca NY

I have the EF-S 10-22, it's a very nice lens, and the price of one has DROPPED around $300.00! Thanks, Canon!
Your field-of-view will be equivalent to 16-35mm.

iloveoliver

Thanks for all the comments. I know I have a cropped camera. I will be renting the 18-135. I checked the 16-35. It costs $200 to rent for 18 days. So that’s out of my price range. I’ll go with 10-22. We’ll be gone for 13 days.

Picture Taker Loc: Michigan Thumb

Buy a shoulder strap with a cable in it, B & H has them about $30.00. You might buy two one for your camera bag and one for your camera.

amfoto1 Loc: San Jose, Calif. USA

You have a number of very good options.

Canon offers two excellent ultrawide zooms:

Canon EF-S 10-18mm f/4.5-5.6 IS STM is one of the smallest and lightest lenses of this type, as well as one of few that has image stabilization and one of the most affordable at under $300. It's a bit plasticky, but it's very capable of making excellent images. Something else that might be nice is that it uses 67mm filters, same as the EF-S 18-135mm. For example, they could share a useful Circular Polarizer. Like many Canon lenses, the lens hood for the 10-18mm is sold separately. I'd highly recommend getting and using it: EW-73C, $23.

Canon EF-S 10-22mm f/3.5-4.5 USM is a bit larger, more robust, and somewhat faster ultrawide lens. It costs a little more than twice as much as Canon's other ultrawide zoom. It's also got excellent image quality, is one of the best ultrawide zooms made by anyone. It's an older design now, doesn't have IS (which may not be all that big a deal on an ultrawide... nowhere near as important as IS is on telephotos). This lens uses 77mm filters and a rather large, but highly recommended EW-83C lens hood ($30).

In addition, there are:

Sigma 10-20mm f/3.5 DC HSM... one of the biggest and heaviest UWA lenses for APS-C cameras, and one of few that has a non-variable aperture... uses 82mm filters and is on sale for about $400.

Tamron 10-24mm f/3.5-4.5 VC Di II... has about the widest range of focal lengths in one lens, also one of the few with image stabilization... uses 77mm filters and costs about $500.

Tokina 12-28mm f/4 AT-X DX... not quite as wide, but a robust lens with a good range of focal lengths and non-variable aperture... fairly hefty and uses 77mm filters... $380.

Tokina 11-20mm f/2.8 AT-X DX... the only lens of this type currently offered with f/2.8 aperture, though this makes it larger and heavier... uses 82mm filters... $470.

There are also:

Sigma 8-16mm f/4.5-5.6 DC HSM.... the widest non-fisheye lens you can buy for APS-C cameras... it has strong wide angle distortion effects... $569.

Sigma 12-24mm f/4 DG HSM "Art"... a high quality, full frame lens.... very large, heavy and expensive at $1600.

Canon EF 11-24mm f/4L... a premium, full frame lens.... huge and ultra expensive at about $2700.

These last three lenses all use convex front elements that preclude using standard filters on them. There are special adapters and oversize filters available for some of them.

Personally, I've got the Tokina 12-24mm f/4 (older model) and the Canon EF-S 10-22mm. Both of those are excellent, but the Canon has the best image quality.

Prices of ultrawide zooms for APS-C cameras have come down significantly in recent years, in large part responding to Canon's introduction of the EF-S 10-18mm... a real bargain. Since then, Sigma and Tokina, in particular, have lowered prices quite a bit. Even Nikon has intro'd a similar budget-friendly 10-20mm Nikkor (their other UWA DX zooms, 10-24mm and 12-24mm Nikkors, are ridiculously expensive).

You can compare any of these lenses side by side at the-digital-picture.com. Bryan thoroughly tests virtually everything Canon-related and has very detailed, useful reviews.

iloveoliver

Thanks amfoto1
I’m not in the buying market right now. But I did copy and paste your comments for when I can afford it. I just purchased the Canon 7d Mark Ii.
I’ve been saving money for the trip and I’m on Social Secretary Disability so my funds are limited. I’ll be renting or look for a used 18-135. I like that lens.
Your comment were clear and concise.
Thanks so much

speters Loc: Grangeville/Idaho

If you're shooting with a crop, I wouldn't consider a 16-35 a wide angle!

BanoyaPh

I have for sale Tokina 11-16 f2.8 Pro for Nikon, I bought a new camera Fuji and this lenses does not work with it

billnikon Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont

I like to only take one lens with me when on vacation. And at only 2mm difference I would take the more versatile 18-135.

dick ranez

Look at the 10-18 at the canon refurb store. It's light, inexpensive and surprisingly good. Should be around $200. It's no faster than your 18-135 so you might consider the 50 1.8 as an alternative if you're into old Catholic church interiors.

TriX Loc: Raleigh, NC

That was my concern as well. Those interiors are dark, flash is often not allowed, and a tripod, if allowed, is cumbesome to carry, so my priorities would be speed and/or IS.