Choosing the right focal length is a crucial part of the creative decision making process for a photographer. You can have ...

The focal length in pixels can be computed using the formula: $$ \text{Focal Length (pixels)} = \frac{0.5 \times \sqrt{4000^2 + 3000^2}}{\tan\left(\frac{75/2}{180} \times \pi\right)} = 3259 $$ options ...