Shortcut Methods
4 : Lens Combinations
- When dealing with a combination of lenses in contact, you can use the formula: $$(\frac{1}{f_{\text{effective}}} = \frac{1}{f_1} + \frac{1}{f_2})$$ to find the effective focal length of the combination.
- This is a straightforward way to determine the combined effect of multiple lenses.
