Focal length 35mm equivalent, but not F-stop?

Started Jul 24, 2014 | Discussions thread
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Chikoo
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Focal length 35mm equivalent, but not F-stop?
Jul 24, 2014

All camera manufacturer when they publish technical specification of their camera lens publish the focal length and it's equivalent in 35mm. But the same is not done for F-stop. Why?

Example:

Pentax MX-1

A 4X optical zoom (28-112mm in 35mm format) at f1.8-2.5 for outstanding depth of field control and beautiful bokeh.

Sony DT 18-135

Focal Length (35mm equivalent) : APS: 27-202.5 mm (35mm Equivalent: 18-135mm)

  • Aperture (Max.) : f/3.5 - 5.6
  • Aperture (Min.) : f/22 - 36
Pentax MX-1
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