Re: Sony A100 to A700

In article <6a9v4rF36336nU1@xxxxxxxxxxxxxxxxxx>, Chris Malcolm says...

The second point is that it is easier and cheaper to design high
resolution lenses if you can get the back of the lens closer to the
sensor than the mirror allows. The only reason we still need the
mirror is to get the optical viewfinder, and the only reason we need
the optical viewfinder is because EVF isn't yet as good as a good
optical viewfinder. But like sensor resolution, that too is simply a
matter of waiting for the technology to get there at an affordable
price. Just as with the sensor resolution improvement, there's no
inherent physical barrier to making EVFs as good as optical
viewfinders, it's just a case of waiting for the well-established
technological development bandwagon to to get there. The only question
is how long we'll have to wait. We need higher resolution small
internal LCDs, and faster processors capable of translating the larger
amount of sensor "pixels" into the larger display at a fast enough
speed.

I'm being told that to have a fast phase detection focusing system
(typical of DSLRs) you need a mirror. Without mirror, as people here
say, you can only have a contrast detection AF.
--

Alfred Molon
------------------------------
Olympus 50X0, 8080, E3X0, E4X0, E5X0 and E3 forum at
http://tech.groups.yahoo.com/group/MyOlympus/
http://myolympus.org/ photo sharing site
.

Relevant Pages

  • Re: ASTRO SAA Re: Question about telescope design.
    ... strip mirror is going to require a complex and expensive _active_ ... The sensor might as ... A fraction of the weight and hence a larger size. ... that could potentially be the vertical resolution alone. ...
    (sci.astro.amateur)
  • Re: ASTRO SAA Re: Question about telescope design.
    ... strip mirror is going to require a complex and expensive _active_ ... The sensor might as ... A fraction of the weight and hence a larger size. ... that could potentially be the vertical resolution alone. ...
    (sci.astro.amateur)
  • Re: Sony A100 to A700
    ... resolution lenses if you can get the back of the lens closer to the ... sensor than the mirror allows. ... you can only have a contrast detection AF. ...
    (rec.photo.digital)
  • Re: Q: Why do DSLRs need mirrors and prisms?
    ... reason that DSLRs still have mirror boxes and pentaprisms? ... that the main thing a mirror does is block the sensor so ... It would seem that the main reason to have a DSLR is to enable the use ... It is at the cost of light loss through the optical viewfinder to the ...
    (rec.photo.digital.slr-systems)
  • Re: Amateur Predicament
    ... The fact that DSLRs cannot focus with mirror up? ... The fact that the DSLR sensor is purpose built for high resolution ...
    (rec.photo.digital.slr-systems)