Messages

16

EOS Bodies / Re: Next year's APS-C vs. this year's FF

« on: November 22, 2012, 06:43:43 AM »

Source: Serious lurking on this forum.

Observation: Two of next year's camera bodies will allegedly get entirely new naming systems: the high MP, and the 7D successor.

Speculation: That's because they'll introduce Canon's new sensor technology. Probably 180nm instead of 500nm (on a side note, I'd love to know more specifics about what that means).

Question: If Canon does implement this tech in a 7D.2, could that APS-C camera produce lower noise at low ISO than current FF cameras?

I ask because I'm pretty invested in EF-S lenses but also very interested in a 6D. Low ISO IQ is the #1 consideration for me. Thanks for any thoughts or info!

There is no sign that Canon has invested money in a new sensor technology
What they can do is  to move the ADC closer to the readout points and improving the signal path way.
If there are any  improvements in the latest camera it is probably noise reduction and already in the raw file stage and in the red and blue channels.

Canon can not with their current technology make  small circuit solutions that other manufacturers can do today, for example Sony, Omnivision Aptina etc.

17

Third Party Manufacturers / Re: Sigma 35 f/1.4 DG HSM First Impressions

« on: November 21, 2012, 09:03:53 PM »

And when we are discussing AF and micro adjustments , there are minor variations in the AF system, this together with 1. camera  AF is incorrectly calibrated  2. the lens AF is incorrectly calibrated  3. Both the camera  and  the lens is faulty. 4. minor variations, its means,  take a series of  5 shoots and place your hand in front of the lens so every shoot against your target will be a new AF measure, then you can se in a series of pictures  that the absolute sharpness varies / focusing accuracy and can look like this.
Number of incorrect parameters can therefore be many .

18

Third Party Manufacturers / Re: Sigma 35 f/1.4 DG HSM First Impressions

« on: November 21, 2012, 08:17:07 PM »

Sigma 70mm (I-R reference lens)  , 105mm , 150mm  , 180 macro  is also high quality lenses.
One  big problem with Sigma lenses  is  that  Canon service center will not not adjust the Sigma lenses to the camera body if there are  any AF focusing problems .

with the new lens series from sigma you don´t need canon for that.
you can do it yourself.

it depends, try to micro adjust a 105 macro or a zoom from the macro mode up to infinity . the best solution is to have all Canon lenses adjusted by a canon service center, a zoom for example  24-105 are adjusted in 8 different positions in the zoom range, in 5dmk2 we  have one, and in 5dmk 3 we have 2 adjustments points.

19

EOS Bodies - For Stills / Re: Too much dynamic range?

« on: November 21, 2012, 05:02:15 PM »

1D series has more expensive electronic chain and also when it comes to shielding etc and 1d series is probably also  better matched in terms of RGB
The old 1dsmk3 has a better response regarding middle tones than 5d mk2 mk3 series an can be seen in a even colored surface.
There also different CFA  in  the old 5d  compared to 5dmk2 mk3 and some experiencing the colors better in the old 5d
Canon changed their color filters  (not so dense ) in order to gain more light/ increasing sensitivity

20

Third Party Manufacturers / Re: Sigma 35 f/1.4 DG HSM First Impressions

« on: November 21, 2012, 04:43:55 PM »

Sigma 70mm (I-R reference lens)  , 105mm , 150mm  , 180 macro  is also high quality lenses.
One  big problem with Sigma lenses  is  that  Canon service center will not not adjust the Sigma lenses to the camera body if there are  any AF focusing problems .

21

EOS Bodies - For Stills / Re: Too much dynamic range?

« on: November 21, 2012, 06:25:05 AM »

No really, it doesn't work like that.  The sensor noise determines both the dynamic range and the number of tones which can be distinguished.  They're inextricably linked.  If you want better accuracy of tones you need to reduce the noise, which automatically increases the dynamic range.

and this  is Canons big problem with their old read out circuits , the read out noise from 5dmk3 (as one  example) are 12 times higher than d800 at base iso, therefore 5dmk3 has about 11 stops DR and Nikon 14 stop

22

EOS Bodies - For Stills / Re: Too much dynamic range?

« on: November 21, 2012, 06:15:12 AM »

Show me one pictures taken with 5dmk2 and mk3 and the difference you are talking about (i have them)
Show me one picture from 5dmk3 and d800 and the difference you are talking about  (I have also d800)

23

EOS Bodies / Re: Has Canon entered the Graveyard Spiral?

« on: November 19, 2012, 05:59:12 PM »

Oh, I thought you understood that if I or any other change a little in the  AWB, see above, the image from the LCD are not showing any green /yellow tint

24

EOS Bodies / Re: Has Canon entered the Graveyard Spiral?

« on: November 19, 2012, 05:49:31 PM »

Well , one is to show that 5dmk2 AWB is not better in than d800 in 2800K LIGHT and that we can agree that the LCD  from d800 and 5dmk2 are showing the pre view jpg different

25

EOS Bodies / Re: Has Canon entered the Graveyard Spiral?

« on: November 19, 2012, 05:42:42 PM »

There are probably  a bug in the jpg rendition, as I told you before, a  d700 or d3s  picture looks the same in d700 and d800 LCD .

So...the LCD has a problem in that there is an incorrect color tint, and the in camera JPG conversion engine has a bug so that it fails to incorporate modifications to the baseline AWB during conversion.  What do you know, two wrongs DO make a right!

Has the AWB bug been substantiated?  This is the first I've heard of it...

we are going to look in to it tomorrow

here is the result from my 5dmk2 and d800
Jpg shooten with AWB  in 2800K LIGHT

5DMK2 TO THE LEFT AND D800 TO THE RIGHT JPG and AWB

AND a corrected RAW FROM 5DMK2

26

EOS Bodies / Re: Has Canon entered the Graveyard Spiral?

« on: November 19, 2012, 05:28:31 PM »

There are probably  a bug in the jpg rendition, as I told you before, a  d700 or d3s  picture looks the same in d700 and d800 LCD . And no, in a serie I just shoot from d800 and JPG (I never use JPG) I can not se any visual differences in  the out come

27

EOS Bodies / Re: Has Canon entered the Graveyard Spiral?

« on: November 19, 2012, 05:15:58 PM »

no I do not, and as I say, you get used, now my Canons LCD looks to reddish, my answer was, if you not like the the yellow tint you can adjust WB so the LCD mirrors a warmer reproduction (RAW), or use another profile (if it is important to se the colors in the LCD" more neutral" ) and regarding d800 the yellow tint are not seen in every situation

You cannot "use another profile" unless you hack the Nikon firmware, you can use another picture style, you can change the WB (though only a fool would do that to get a more accurate screen rendition), you can change saturation, but you can't change the screens profile.

the eyes (brain) adapt  to the more yellow  LCD after a while.

Nikon themselves have now acknowledged this is a fault, even if you don't, and they are dealing with correcting it. But even though the eye/brain has an incredible ability to deal with coloured light and auto correct, that doesn't diminish the fact that, amazing though they are, they cannot instantly correct between a green screen and the actual scene in front of them, indeed that is why the D800 and D4, the $6,000 camera in my earlier post, both appear to have green tints, precisely because the eye can't deal with the inaccuracies of the Nikon screen profile.

pictures style standard , neutral etc are profiles and the differences shall also been shown in the LCD

28

EOS Bodies / Re: Has Canon entered the Graveyard Spiral?

« on: November 19, 2012, 05:07:56 PM »

The d800 screen looks like vomit. Very similar to what It used to look like on my 5Dc. Its terrible.

strong words, there are no problem  to adjust the AWB a little bit and and then the motive looks fine at the LCD in d800.
The yellow /green tint is gone (in the LCD)
The  small AWB correction does not affect the jpg image out from the camera

This is AWB from 5dmk2, d800 and  raw file adjusted
None of the AWB in 5dmk2 or d800 does a proper job in 2800K

29

EOS Bodies / Re: Has Canon entered the Graveyard Spiral?

« on: November 19, 2012, 05:22:29 AM »

who says Canon has a problem?

You did. 

...now my Canons LCD looks to reddish

Oh, and by the way, your comment that you get used to it (the greenish tint on the D800) is interesting - if the LCD was displaying correct colors, there'd be nothing to 'get used' to...


@NormanBates - thank you, but you fail to understand. Let me try to explain. The D800  has no problems.  The problem is  anyone who fails too  appreciate its perfection.




<\sardonic impersonation>

the eyes (brain) adapt  to the more yellow  LCD after a while.

30

EOS Bodies / Re: Has Canon entered the Graveyard Spiral?

« on: November 18, 2012, 08:26:40 PM »

Between the wife and myself we have 5 Canon bodies and 18 lenses of which only the 15mm fish eye and an old 100 macro are not L glass, with 7 series 2 lenses, so there is a sizable investment in Canon kit.
...

Lets see the Nikon crap capture this image at ISO 25K from a helicopter.



Sounds to me most of the better shooter just happened to be using Nikon

I'm pretty sure a D4 would have no trouble with taking a shot like that
in fact I'm pretty certain Joe Mcnally has published similar aerial shots taken from helicopters using D3s

Technically speaking, the D4 literally could NOT take a photo like that with that low level of noise. The NY blackout was shot at a NATIVE ISO 25600, where as the D4 tops out at a native ISO 12800. If you enabled expanded mode ISO settings, on the D4 ISO 25600 is just a 1 stop digital boost to ISO 12800. That is the same as using ISO 12800 and underexposing by 1 stop, then boosting in post. The D4 has no DR advantage at that level, as the very very vast majority of noise at ISO 12800 is photon noise, and dynamic range is limited by physics. A digital boost is going to lift all of that noise as well, so I'd be doubtful it could take a shot at ISO 25600 expanded as cleanly as the 1D X at a native ISO of 25600. The 1D X, on the other hand, will use per-pixel amplification during read (and thus before read noise is introduced) to achieve its ISO 25600. The photo will still be dominated by photon shot noise, but with the high S/N of the 1D X, it should always produce a cleaner photo at ISO settings above 12800 than the D4. Additionally, the 1D X, since it has native ISO settings up to 51200, can use third-stop ISO settings between ISO 25600 and 51200, where as the D4 is limited to full-stop digital boost settings between ISO 25600 and 51200 (as well as 102400 and 204800, same as the 1D X).

I'd call the 1D X the definite winner in the high ISO game here...cleaner readout (no digital boost) with finer-grained third-stop ISO settings up through ISO 51200.

if I am not colorblind the measurements tells a different story