The Canon EF 70-200mm f/2.8 L USM Lens and Canon L Series 70-200mm family.

The 70-200mm L lens family shows many genetic similarities aside from their obvious focal length range similarity. Top notch image quality with build quality to match is at the top of the list. All have constant wide apertures (f/2.8 or f/4) over their entire zoom range. All feature fast, quiet and accurate auto focusing benefiting from Ring USM (Ultrasonic Motor) and internal-focusing. All four are internal zooming lenses - the physical length of the lens does not change throughout the zoom range. All four share 8-blade apertures (though the IS lenses features a round aperture) for excellent out-of-focus blur quality.

Canon 85mm F/1.8

The Canon 85mm f/1.8 is a great lens. It's inexpensive and works extremely well. In many aspects the 85mm f/1.8 outperforms the exotic special-purpose Canon 85mm f/1.2L II that costs five times as much!

Tokina 11-16mm F/2.8 II

Tokina 11-16mm f/2.8 II is a bargain of a fast ultrawide zoom. It comes in versions for Nikon and for Canon.

This new "II" version is the same as the original Tokina 11-16mm lens, but with supposedly slightly better multicoating. More importantly, the "II" version adds an internal autofocus motor in the Nikon version so it now autofocuses even on Nikon's cheapest cameras.

It is built more solidly than Nikon or Canon's own lenses.

Canon EOS 6D vs Canon 5D Mark III

The Canon 6D is the smaller and less expensive version of the 5D Mark III. They take the same battery and accessories.
The differences are minor, so if money matters, of course get the 6D for 40% less money. The 6D loses about 5% of some of the 5D Mark III features, most notably a simpler AF system, only two "C" modes, only one memory card and no auto brightness control for the LCD, but adds the same 5% back with GPS and WiFi not in the 5D Mark III. Many people will prefer the 6D for adding GPS with lighter weight.

Canon 7D vs 60D

Which is your preferred method of composing photos? Is it through the viewfinder, or is it using the LCD screen? If you prefer the old-fashioned method of looking through the viewfinder to compose your shots, the 7D is better because its viewfinder has a 100% field of view, whereas the 60D’s viewfinder has a 96% field of view.

Tamaron 17-50 f/2.8 VC

One benefit to cropped body cameras is the additional choice of lenses. While full frame camera’s enjoy only the 28-70mm range for zoom coverage, cropped sensor bodies use the equivalent 17-50mm range to achieve the same results. The typical challengers in this range are the Nikon 17-55 f/2.8, Canon 17-55 f/2.8 IS, Sigma 17-50 f/2.8 OS, and the Tamron 17-50 f/2.8 VC. All of these choices, except for Nikon offer image stabilization and all offer the coveted f/2.8 wide open aperture. While both the Canon & Nikon are priced at over $1200, the Sigma and Tamron offer similar results at half the cost. Look for upcoming reviews on other lenses in this category

Canon EF 24-70mm F/2.8L II USM

The Canon EF 24-70mm f/2.8L II USM was announced a year ago, in February 2012, as an update to the venerable EF 24-70mm f/2.8L USM of 2002. It features an all-new optical design, designed to provide improved imaging performance right across the frame and reduced distortion compared to its predecessor. The lens also features a smaller, lighter design and weather-sealed construction, and Canon promises improved robustness due to revised internal construction. It's designed primarily for Canon's high-end full frame bodies (with a price tag to match), but can of course also be used on APS-C SLRs such as the EOS 7D, on which it offers a 38-112mm equivalent angle of view.