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Messages - Canon-F1

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706
i see it this way.

canon must have a good reason to choose 18 MP for it´s new camera.
if they could have produced the camera with the same specs but 30 MP im sure they would have done that. don´t you think so?

so it seems that CMOS (that includes foveon like sensors) and CCD sensor technology is slowing down.

and it´s not as easy as producing faster CPU´s for a computer.
for faster CPU´s you make the DIE bigger or shrink the lithography process to put more transistors on the DIE. you can also hardcode special functions to speed up calculations.
but even CPU´s running against a wall, for years we are around 4 GHz.

a 35mm FF sensor must have a certain size, you can´t make it bigger.
unlike CPU´s shrinking is not the holy grail.... smaller photosites will not help you increasing DR or reducing noise.
there is not much you can do when you reach a certain point of optimization.
you can´t influence the absolut number of photons that reach the sensor area (of course you can, for example with flash... but i think you get what i mean ;) ) and you can not increase the absolut sensor area.

you can only decrease the size of additional circuits to make more room for the photosites (as canon has done for the new sensor. sony has done it with it´s backlit sensor), so the photosites can catch a greater percentage of photons.

sure you can always try to reduce the SNR but that will be expensive at a certain level.

new materials could help or a new sensor technology.
but i think we should get used to smaller steps in sensor development.

Quote
however it will not outperform the 5D MKII in resolution, after proper sharpening is applied.

i say that depends on the AA filter that´s build in. but i have not done the math.
how is optimal resolution of the new 18 MP sensor compared to real world resolution of the 5D MK2 (i know that is unfair :) ).

it may not outperform the 5D MK2.. but it could be a imperceptible difference.

707
Last time looked, DPR's numbers for DR were based on in-camera JPG shots of a step wedge. If that's no longer the case, happy to hear it. If they're still doing that...need I say more?

Actually that´s (imho) closer to reality then the 12-13 Stops from DXO Mark.

8.x EV (9.x with Raw Headroom) seem to be what i can achieve with my 1D MK4.
But i sure come nowhere near the 12 Stops from DXO Mark.

Quote from: DPreview
Our Dynamic Range measurement system involves shooting a calibrated Stouffer Step Wedge (13 stops total range) which is backlit using a daylight balanced lamp (98 CRI). A single shot of this produces a gray scale wedge from the camera's clipped white point down to black (example below). Each step of the scale is equivalent to 1/3 EV (a third of a stop), we select one step as 'middle gray' (defined as 50% luminance) and measure outwards to define the dynamic range. Hence there are 'two sides' to our results, the amount of shadow range (below middle gray) and the amount of highlight range (above middle gray).



Quote
That would explain why every camera was measured to have around 8 stops of DR... no matter what the actual dynamic range recorded by the camera they are all converted to the standard jpg file format with 256 levels per colour channel.

Sonys Sensor is measured with 9.4 EV.

708
EOS Bodies / Re: EOS-1D X Canon USA Press Release
« on: October 18, 2011, 02:50:41 PM »
Direct quote from Dan Carr's web-site...  are you going to tell him to get a clue???

yep i do exactly that.

of course 1/500s or 1/2000s would be nicer then 1/250s.

but 1/250 or 1/300s that´s just a matter of more flash output, smaller aperture, a ND filter etc. and not a dealbreaker.

709
The pixel size is 8.5% larger in the 1D X compared to 1Ds3 or 5Dm2.

the diameter is 8.5% larger.

you mean that the pixel AREA has seen a bigger increase then 8.5%?

710
EOS Bodies / Re: Additional 1D X Coverage.
« on: October 18, 2011, 02:23:33 PM »
I just don't get why 12 fps beats 10.

but you do get why 21 MP are better then 18?   ;D

Quote
It'll be interesting to see how the 36 Mp Nikon D800 will fare in this

if this rumor will become reality....

711
EOS Bodies / Re: EOS-1D X Canon USA Press Release
« on: October 18, 2011, 02:18:48 PM »
  Another issue is the max sync speed is down to 1/250s which might bother outdoor shooters trying to overpower the sun with strobes... for example Dan Carr talks about his on his web-site.   Overall, as another member stated earlier today, don't forget Canon is in the business to sell cameras and they are building this camera for the possibly the biggest segment of pros... those working in the field (rough and wet conditions) who need fast shutter speed and low light performance.

there is much nonsense in your post but this is the worst....

do you think 1/250 or 1/300 of a second makes a big difference in overpowering the sun?

please get a clue what you are talking about.....

712
EOS Bodies / Re: What else will they do with that 18MP FF Sensor?
« on: October 18, 2011, 06:59:42 AM »
fact is you all have no idea.... so why not stop whining about what will canon do with a camera we don´t even have the slightest clue about (aka 5D MK3)?

you sound like a bunch of kindergarten kids....


Quote
It's not entirely unbelievable considering the 5D2 is renowned for video and the D800 rumored at 38mp.

oh it´s 38 MP already.. last time i checked rumor was 36MP.... lets see what MP this monster will have next sunday.   8)

713
EOS Bodies / Re: EOS-1D X Canon USA Press Release
« on: October 18, 2011, 06:37:00 AM »
I guess I'm clueless then :-). I like to do landscape photography and I rarely use the 3:2 format, cropping to 4:3, 5:4 or a wider format like 16:9 or 2:1. I like large prints and do c-prints typically at 50x40 cm sizes, and occasionally larger up to a meter or so. I like to provide high technical image quality. Detail is the quality that is easiest to see. Many underestimate the ability to see detail, the old guidelines were based on the limitations of 35mm film, not what an healthy eye actually can see. And a low res analog image with film grain is much more pleasing to the eye than a low res digital image with pixelation.

People see the actuall numbers.
18 MP vs. 21 MP or 24 MP.
But that does not paint the correct Picture when it comes to image detail.

3 MP more does not make a big difference in resolving power. 
In fact i doubt anyone here can see the difference in Print.

For cropping and enlarging i have to agree that Noise is a bigger problem for me then Image Detail.


Quote
What I hope for is a full-frame camera that pushes the resolution to the limit (hopefully a bit past it) what is reasonable for the best 35mm lenses. Nikon's rumoured D800 36 megapixels without AA filter seems like a good target. I hope that 5Dmark3 or some other model will be similar.

You can´t have all in one camera as it seems.
But even yet some complain that the new 1D X tries to be an allround camera for Sport, Wildlife, Landscape and Studio.

I guess there will be an ~30 MP 5D MK3.

Quote
From the amount of pixels on the sensor, it seems like this should be a cheap camera (and that was part of what was throwing me off before), but it won't be.

sensor prize has more to do with the size of the sensor (sensors per wafer) then pixels on that sensor.

714
EOS Bodies / Re: EOS-1D X Canon USA Press Release
« on: October 18, 2011, 06:27:51 AM »
as a low light shooter this sounds very good:

Quote
Canon has also evolved the sensor technology, reworking the internals of each pixel on the way to producing what Westfall says is the lowest noise of any EOS digital SLR to date. By way of example, he says that an ISO 51,200 photo from the EOS-1D X shows roughly equivalent noise levels to an ISO 12,800 photo taken with the EOS-1D Mark IV.

715
EOS Bodies / Re: EOS-1D X Canon USA Press Release
« on: October 18, 2011, 06:14:00 AM »
Call me weird if you want to but this replacement for the 1D sports/photojournalist body does nothing for me.

To read that the 1Ds 111 has been discontinued is a shock. For a long time I had been planning to buy the high MP, high quality 1Ds replacement, but I've got no interest in anything this body is offering. Its gone in entirely the wrong direction for my personal photographic interests.

And you need such a juggernaut for what?
Your Flickr or Zenfolio account.. LOL

I guess the 30D you made some pictures with will be good enough for Zenfolio the next 5 years.

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