"If this lens had a constant aperture it would be about as perfect as a zoom can get for my uses. (I shoot a lot of climbing, i.e. environmental portraiture.) This is my favorite zoom lens. It covers an excellent focal length range, and the 24 mm equivalent wide end is my favorite part!

Nice and sharp wide open at all focul lengths. IS works great. No problem for sharp pics at 1/13 a sec at 34mm on 7D.Mine is almost as sharp wide open as it is at F8. No decentering at all.

Lightweight; Durable; Fast / accurate auto-focus; Consistent Output

Pricey

This lens spends the most time on my 70D due to its versatility and overall IQ. I got the 18-135 STM with the 70D but subjectively I think this lens produces better quality. I take this, the 10-22, and 70-200 f/4L IS (and 1.4x TC) in my bag to cover the gamut of focal lengths I'm most interested in...

The lens appears brand new and I assume it is, but it was not in Canon packaging, so appears to be a 'gray-market' lens. That also accounts for why its price was significantly less than is commonly listed for this lens.

Bought this to replace my 18-55mm kit lens for my canon 550d... awesome diwali offer from flipkart and got it at 12000 rs off for 46k. This is a near L quality carry around lens for canon crop sensors, covers a good range even at the wider end, awesome focussing with USM motor and ful time manual...

I purchased the T3i with the standard 18-55 mm lens. After using the kit lens, it was decided that a higher quality lens was needed. Purchased the 15-85 mm and the difference is like night and day.

I was using a Tamron 18-270 lens as a walk around lens but was not satisfied with quality of the pictures. Sold the Tamron lens and got this one and have been using it for 4 months. As other canon lenses, it captures very sharp pictures and colors are very accurate. Focus is quick due to USM.

EF-S lenses get a bad rap in my opinion. Because they are specifically designed for the APS-C format they can be made smaller and lighter and that makes them a lot cheaper. The does not mean that they are optically inferior, as born out by the 15-85mm.

I purchased my EOS 550D as a body only to use this as the primary lens (rather than the 18-55mm) and I have not regretted it at all. The extra width provides a better working space when taking group photos or need that little bit more of the landscape, as well as a decent amount of zoom that your...

Superior build quality; Reliable; Durable; Easy to use

Having a much higher optical quality than its predecessor (17-55mm) the Canon EF-S 15-85mm f/3.5-5.6 IS USM Lens is an excellent all purpose lens that will be perfect for the APS-C (crop) sensor camera.range. Ideal for landscapes, street photography, portraits etc.