Clapperboard wrote:
billnikon Yes FASTER means FASTER but if you care to check most makers range of lenses you will find as I said the faster lens is also the sharper lens. A Canon 50mm. F1.4 is a much sharper lens than the Canon 50mm. F1.8. The Canon 70/200 F2.8 IS is much sharper than the Canon 70/200 F4 IS and so on. It appears to me you have not troubled to research my comment before disagreeing with it, but thanks for your enlightening input.
Then I have a question : If each of those lenses were used to take the same picture under the same conditions, let's say ISO: 1200, f5.6, 1/250, would the 1.4 lens shoot a sharper image than the 1.8, and if so why? If both were shot on "auto" would they still use the same parameters to take the same pic to achieve the same results.