What's a great F1.2 or possibly F1.4 Lens for Canon?

[Skyelark]

I'm considering a F1.2 Lens for Canon , wondering what options are available , something reasonably sharp wide open?
Canon L would be the best I'd imagine but I've had great experiences with Sigma & Tamron's pro level Canon lens.

The Canon 85mm f1.2L is one option and the Canon 50mm f/1.2L which apparently has superb bokeh but chromatic aberration issues.
The one thing about a F1.2 lens that would make me consider a F1.4 is the enormous weight relative to focal length . Some say a good copy of the Sigma EX 50mm F1.4 will do all that I need.

I do want F1.2 for the extra bit of bokeh "wow" it adds to pics and low-light useage.

Another option is the Carl Zeiss Planar T* 85mm F1.4 for Canon but that's manual only - there are times when under pressure that having auto-focus is indispensable , but I generally like manual focusing if there's time . Image quality is apparently superb with the Carl Zeiss , would be interested to hear from anyone who has used that particular lens.

[Skyelark]

A point to note is I have found quite a few people mentioning that having a body that supports lens micro-adjustment is the only way you'll get some sharpness wide open on a F1.2 lens - ie the 85 or 50mm L canon F1.2 lens , that also applies to a slightly lesser degree to any F1.4 lens.

The DOF is so razor thin at these wide aperture's , if there's just the slightest back or front focusing in combination with your particular body you will struggle to get any keepers wide open.

[Jaco de Klerk]

SL, these super fast lenses are often very sharp.. but mostly not simultaneously.
Either you use them wide open and fast, or stopped down and sharp. More so on a FF body.
If you need fast, no argument.
If you need sharp, consider saving money by buying the slightly slower version.

For more specific advise, I suggest indicate what you plan to use it for, which bodies you have, etc.

[Skyelark]

SL, these super fast lenses are often very sharp.. but mostly not simultaneously.
Either you use them wide open and fast, or stopped down and sharp. More so on a FF body.
If you need fast, no argument.
If you need sharp, consider saving money by buying the slightly slower version.

For more specific advise, I suggest indicate what you plan to use it for, which bodies you have, etc.

On 5D MK I's
To be used for low-light event shoots , studio portraits , maybe one or 2 location/landscape shots and some product shots
Basically looking for the that F1.2 subject isolation that if used wisely can be worth more than gold

[Jaco de Klerk]

For low light you need fast. Rent the options first so you can pick optimal FL..