Hi.

I am thinking of purchasing a new lens for my Canon Rebel xsi.  I want to use this lens for portraits, perhaps landscapes and low light situations.

I think I want a wide angle, fixed. I am looking at two different lenses at the moment and would appreciate information or advice on choosing.  Maybe you have one, used one or know about lenses in general. Or maybe you have another to suggest. 

The first lens is the EF 35mm f/1.4L USM and the second is the EF 24mm f/1.4L II USM. 

As far as I can tell, neither one has Image Stabilization, which I am used to in my other lenses.  I don't know if this is important or not. This will not be a "replacement" lens, but a lens to add to my bag.  I only have three other lenses, two of which came with the camera and the third (my first lens investment) is a f/2.8, 100mm usm is, macro lens. 

Thank you so much,

Melinda

I am also looking at a third lens.  It is not wide angle, but costs much less than the first two.

EF 50mm f/1.4 USM

You have a crop body so that is something to consider when buying lenses. The 24mm on a crop body would come to about 38mm, and the 35mm would come to about 56mm. The ideal portrait lens for a lot of people is 50mm. I dislike it personally, and use my 85mm more than anything, but that's my opnion lol.

So, if you want to do portraits I suggest going with the 35mm.

If you're looking to do landscapes the crop factor is something you need to consider as well. As stated above the lenses, in my opinion, would not be wide enough. The 24mm might, but I would say something around 18mm-35mm would be the best bet for landscapes.

I would also suggest looking at both the canon 50mm 1.4 and 1.8. The 1.4 is incredibily soft for the price they're selling it. That and the CA you see wide open, it's not worth the money. If you're looking for a good 50mm I would go with the new Sigma 50mm. 1.4 ART lens. Though it is very pricey, it is as good, if not better than the 1.2L lens from Canon.Also to add, the 50mm will come out to about 80mm on a crop body, so you're close to 85mm which is what I like when it comes to portraits.

Thank you.  I have so much to learn. You have given me a lot of information to consider.

I opted for a new camera body (70D) .... lenses at a later date.

I like your choice!  :)  Congrats on your new gear!