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That model is a crop sensor so the canon 10-22 would be best for landscapes.

I wouldn't spend too much on high quality lenses until you upgrade the camera body itself

Don't jump into the L-series in other words

I see the point regarding an absolute hobbyist who never intends to upgrade/take photography seriously, but what hurts more? Buying cheaper glass to save now that's incompatible with any full frame you buy later? Or going ahead and eating the cost and buying nice glass now that will benefit both your crop sensor and any full frame you buy later.

If you're never going to upgrade to full frame or higher quality crop sensor, there are better options than going out and buying Canon L.

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if it were me, I'd get a better 50, unless you are needing some sort of zoom.

I'd advise against this for the sole reason that the only lens she currently has is a prime. The only reason she should upgrade that 50mm is if she's spending in excess of $1000 on the 50L or something, but still, someone new to photography going on a trip with nothing but a 50mm is a recipe for frustration and a quick turnaround to disinterest in photography.

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My wife has the Cannon EOS rebel T3i. We are headed to the see the sequoia trees at the end of May and I want her to have the proper lens for quality shots. Right now the only lens she has is a 50mm 1:1.8 stm. This is jibberish to me and I would like some input as to what lens to get her.

Also how many batteries should we bring for the trip? I know her batteries don't last long. We will have access to an inverter to charge them in the truck. We will be primitive camping on this trip so that will be the only option for charging. Thank you!!

The T3i is a highly capable camera body. The most important question is really how much are you willing to spend? The Canon 18-135mm f/3.5-5.6 is the best kit lens any manufacturer offers IMO, and it can be had used on B&H right now for $280. I(LINK ).

She already has a fast lens, so she may not care that it's relatively slow. It also has image stabilization which makes up for its lack of wide aperture to an extent. That lens has the capability to take some great photos though, and gives her 5x more options than anything suggested in this thread.

The Tokina 11-20mm f/2.8 is also an incredible wide angle for crop sensors, but is nowhere near as versatile as an 18-135mm.

Considering that she only has one lens right now, and that it's a prime, I would go the more versatile route and get the 18-135mm. It will give her the ability take a significantly wider variety of photos effectively, whereas she'll be hamstrung with a wide angle for wildlife/bird photography, or anything else at longer focal lengths.

Re: batteries. Canon bodies are actually pretty good on batteries, and access to an inverter is nice. Still, I wouldn't go on a trip like that without at least 4 batteries. If you want, buy her these. Great quality and super cheap: LINK