Hi, read the article that Kenko 2x tele-converter needs f2.8 and higher. Does that means that it cannot be used for lens of f3.5-f4.0 type? Thinking of getting one to increase my zoom but my lens fall within range of f3.5-f4.0.
What will be the effect or consequences if use AF?
Lost and confuse
What will be the effect or consequences if use AF?
Lost and confuse