why not f/1.2 by Sony?

Started May 14, 2013 | Discussions thread
EinsteinsGhost
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Re: why not f/1.2 by Sony?
In reply to stan_pustylnik, May 15, 2013

stan_pustylnik wrote:

EinsteinsGhost wrote:

stan_pustylnik wrote:

TiagoReil wrote:

quezra wrote:

captura wrote:

Instead of concentrating on bigger f1.2/1.4 lenses, they could just make sure that OSS is installed in most of the new ones including the new Zeiss lenses. Stabilization is worth about 2 f-stops, anyhow.

Well the things OSS don't help with are DoF and shutter speed which is still necessary for fairly common objects of photography (e.g. active children).  But yes, for anything static OSS is just fine.

IF you cant get children moving with an 1.8 lens cause of speed, then you wont get them with a 1.2 too. Remember that is a stop of light, and not even that, probably it is that a 60, 70 % of a stop of light cause of the sensor problem. So with a 60%, 70%, you really think you will get those kits moving static? It is not enough. Yes, everything counts, but if you got movement at 1.8, you are still are going to get it at 1.2

There is big difference in 1 stop for indoor photography where benchmark lenses f/1.2; f/1.4 rule, difference between 8", 4", 2", 1", 2, 4, 8, 15, 30, 60, 125, 250, 500, 1000, 2000 is huge.

  • 1/1000 s
  • 1/500 s
  • 1/250 s
  • 1/125 s
  • 1/60 s
  • 1/30 s
  • 1/15 s
  • 1/8 s
  • 1/4 s
  • 1/2 s
  • 1 s

Shutter speed comes down, not to f-stop but, to t-stop. So, what might seem like a 1-stop advantage going from f/1.2 to f/1.8, might shrink to 1/2-2/3 stop.

Please compare your info to:

http://en.wikipedia.org/wiki/Lens_speed#Fast_lenses

I guess, that explains why you have absolutely no interest in understanding if t-stop matters.

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