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Messages - Noink Fanb0i

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61
Third Party Manufacturers / Re: Nikon's D4 Outed Officially
« on: January 05, 2012, 07:34:10 AM »
Some reality check I read in another forum RE: "Highest Native ISO":

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  Q: So it may be that Nikon (+ Aptiva?) have actually done it again and there's a new step forward in sensor high ISO tech?

A: More likely Nikon's firmware programmers. Changing the higher H ISO's to numbered ones is purely a firmware mod, and can be done at very short notice. Most likely an earlier firmware version had 12800, then Nikon saw Canon had released at 102400 felt that their 102400 was likely to be better than Canon's so any comparison would be in their favour so changed the names from H1 and H2 to 25600 and 51200. It is just a name change, no more.

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There is certainly a new step forward in marketing claims. Don't expect the D4 ISO 102K to look like D3s 25K (except possibly in the JPEG output if the in-camera NR algorithms have been improved that much).

In the D3 line, the "H" designations are used when the analog chain is at max gain and the ADC output is numerically scaled to produce the additional boost. This may imply that the analog chain has much more gain capability in the D4, although I can't imagine that would make a significant difference in IQ at those stratospheric levels.

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An optimistic scenario would be that a pixel in D4 can contain an equivalent of 64K levels, that is it is full 16 bit. Suppose "base" ISO is 100. ISO 102K means 10 bit shift, that leaves 6 bit useful not counting noise, and maybe about 3 stops of photographically usable DR if noise is taken into account. That makes me doubt 102K ISO is in fact "native" and usable enough for something larger than 5x7 prints. I think 5600 may be closer to "native".

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Great marketing, though.

Look at how many people are excited and now expecting to have clean pictures shot in extreme low light, all cause the rumors say "native ISO 102k".


So, in short, people expecting the D4 would be "1-stop better" than the 1Dx at high ISO just because its advertised rumored native High ISO is "1-stop higher" than the earlier announced 1Dx would be in for a grainy & blotchy surprise.  :P

62
Canon EF Prime Lenses / Re: Canon EF 85mm f/1.2L II USM
« on: January 05, 2012, 04:02:24 AM »
Can I request for some action shots from this lens? It doesn't have to be fast sports or anything similar, I would just like to see if its possible to shoot moving subjects with this relatively-slow AF'ing lens.

63
Canon EF Zoom Lenses / Re: EF 24-70mm 2.8L
« on: January 05, 2012, 03:57:55 AM »
Some I took with the 24-70L on 5D2 before I sold it to buy the 85L f/1.2 II . Great lense but too much massive to me!!




Agreed on this one.

64
Canon EF Prime Lenses / Re: Canon EF 800 f/5.6L IS
« on: January 05, 2012, 03:54:14 AM »
Really nice shots, shows what a super-tele can do...  8)

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