Tag Archives: aperture

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KYC#6 : Why aren’t all my focus points enabled?

Let’s assume that you have a camera which claims that it has 51 focus points.    You attach a 300 f/2.8 on it and you can select any of the 51 focus points. So far […]

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KYC #2 – Why is an f/2.8 lens called faster than f/4

The 70-200 f/2.8 is said to be a faster lens that the 70-200 f/4. What does this mean? Well, the most common answer that I have heard is  – ‘it gives faster shutter speeds’  Lets take a […]

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