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What is the rule to convert the 'mm' notation to the 'optical zoom' notation? I searched a bit and found this one:

optical zoom = maximum focal length / minimum focal length

$$\text{Optical zoom} = \frac{\text{Maximum focal length}}{\text{Minimum focal length}}$$

For example a 18-55mm18–55mm lens would have a 3x optical zoom, and a 18-200mm18–200mm lens would have a 11x optical zoom. Is that right?

What is the rule to convert the 'mm' notation to the 'optical zoom' notation? I searched a bit and found this one:

optical zoom = maximum focal length / minimum focal length

For example a 18-55mm lens would have a 3x optical zoom, and a 18-200mm lens would have a 11x optical zoom. Is that right?

What is the rule to convert the 'mm' notation to the 'optical zoom' notation? I searched a bit and found this one:

$$\text{Optical zoom} = \frac{\text{Maximum focal length}}{\text{Minimum focal length}}$$

For example a 18–55mm lens would have a 3x optical zoom, and a 18–200mm lens would have a 11x optical zoom. Is that right?

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How do I convert lens mmfocal length (mm) to x-times optical zoom times?

Post Merged (destination) from photo.stackexchange.com/questions/26992/…

What is the rule to convert the mm notationto'mm' notation to the optical zoom'optical zoom' notation? I searched a bit and found this one:

optical zoom = maximum focal lenghtlength / minimum focal length

For example a 18-55mm lens would have a 3x optical zoom or, and a 18-200mm lens would have a 11x optical zoom. Is itthat right?

What is the rule to convert the mm notationto the optical zoom notation? I searched a bit and found this one:

optical zoom = maximum focal lenght / minimum focal length

For example a 18-55mm lens would have a 3x optical zoom or a 18-200mm lens would have a 11x optical zoom. Is it right?

What is the rule to convert the 'mm' notation to the 'optical zoom' notation? I searched a bit and found this one:

optical zoom = maximum focal length / minimum focal length

For example a 18-55mm lens would have a 3x optical zoom, and a 18-200mm lens would have a 11x optical zoom. Is that right?

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