Windows 8.1. Windows 7 (x64) Windows 7. Detail. Firmware incorporates the following enhancement: - Reduces color unevenness when capturing images using long (Bulb) exposure mode with the EOS Ra. *Manual focus cannot be activated during exposure. And performing zoom operations during exposure, the subject may be out of focus.
The Canon EF 24-70 f/4 L IS USM is a great contender due to its lightweight design, a constant aperture of f/4 and optical image stabilization. There is an f/2.8 version of this lens but it's considerably heavier and will cost you a lot more and to be honest, you'll be able to get away with f/4 for pretty much all food photography.