Los-Angeles-Shooter wrote:
Incorrect. It could be done in software. Even in a software upgrade. Some of the modern cameras, like Windows, have bugs in the software that require fixes anyhow.
Another nice improvement, and one that would be easy, would be to provide a way to lock the zoom at a particular point.
Actually, it can't be done with software-The f/stop is a ratio of the physical size of the lens opening and the focal length of the lens. The lens would have to be physically redesigned in order for the f/stop to remain constant at all focal lengths. That is why constant aperture lenses are more expensive, and usually larger and heavier. As far as using variable aperture lenses in manual mode(as in using studio strobes) your camera will tell you if the f/stop you need is available with the focal length you have chosen. I have done quite a bit of school and volume portrait photography with variable aperture zoom lenses without any problems(in these situations, consistency of exposure is extremely important for the lab to be able to print the images with minimal adjustments).