why not f/1.2 by Sony?

Started 11 months ago | Discussions thread
tomtom50
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Re: why not f/1.2 by Sony?
In reply to GaryW, 11 months ago

GaryW wrote:

My concern is what tomtom50 posted about - past about f2, it just won't make much difference, at least for light-gathering power, on APS-C sensors. I guess that leaves DOF, or is that reduced as well?  If an f1.2 lens does no better than a f1.8 lens, I'd rather pay less for the 1.8.

Having said that, how does f1.2 work on the Nikon1 if it doesn't work on APS-C?  (Tomtom?)

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Gary W.

That is the question, isn't it?

The Sony 35mm f1.4 lens works pretty well on the a900 (T1.6) and not so well on the a380 (T2.2). Yet Sony is happy to sell it as an alpha lens to all alpha owners (and NEX., since they sell adapters).

I guess it is buyer beware, except how is a typical buyer to know?

As for DOF, the same problem applies. The more angled rays that are lost come from the outside of the lens, so not only do you get less light you get deeper DOF. Oh well.

How does the Nikon f1.2 work on the 1? Who knows. Maybe as poorly as te Sony 35mm f1.4 works on the a380. Maybe better on the 10MP Nikon1 than the 14MP or vice versa. Maybe Nikon took this into account in the sensor design and it will work well.

The problem is that we cannot count on the manufacturers to tell us about this. Sony seems perfectly happy to sell 35mm f1.4 lenses to a380n owners without warning them. Would Nikon be more careful?

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