« on: September 11, 2013, 07:03:40 PM »
Why not in Europe?
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So, if that ratio holds, 50 million of those 90 million lenses are most likely the variants of the EF-S 18-55mm kit lens.
That is nothing to be proud of.
best making your own..
Some people forget that F aperture is not (just) about bokeh, blur, etc. its about the amount of light which can reach the sensor. In that matter the F value is equivalent between FF and APS-C.
I don't think so. Aperture is about the diameter of the blade iris. The amount of light actually conveyed to the sensor is measured in T stops.
Regardless of the light transmission, an f/1.8 aperture will produce the same exposure at the same ISO and shutter speed whether full frame or crop. I think that's what he means.