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Messages - 3kramd5

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106
EOS Bodies / Re: A Sony & Canon Sensor Partnership Mentioned Again [CR1]
« on: January 28, 2015, 09:35:46 AM »
How does sony have that capability? They must expend vast resources on their fab lines.

Either way: cool. Hopefully sourcing sensors will bring down the cost.

107
EOS Bodies / Re: Big Announcements Coming Next Week [CR3]
« on: January 27, 2015, 07:21:38 PM »
I'm still proceeding under the assumption that the "big megapixel" camera is actually a DPAF sensor where the megapixel count of images will be half that of the number of photosites.  So, I'm expecting a 26-ish mp camera.  Which would be fine with me, I don't need and truthfully can't handle (processing) over 50 megapixels.

Is the 70D specified as a 40 MP camera?

Like Foveon - 51mp - three layers 17mp each...

Hardly relevant to how Canon specifies cameras with multiple diodes per pixel location.

108
Third Party Manufacturers / Re: Sony A7 II Review.
« on: January 27, 2015, 04:05:17 PM »
b) Sensors nowadays are very close in terms of performance, despite constantly being said otherwise.
c) Is this Sony's A7 2nd generation FF superiority?

Per that review, while it's a second generation of the camera's design, it's the same sensor as the original model.

109
EOS Bodies / Re: High Megapixel Camera Coming in 2015 [CR3]
« on: January 27, 2015, 09:43:44 AM »
...
In reality, image quality is a subjective term. It is a property of the image viewed, and varies by viewer to viewer. There are certain objective measures of sensor performance, but none of them should be summarized as "image quality".

As I've mentioned before, reviewers all over the Internet would disagree

Ah yes, the Internet, with its vast array of infallible experts. Where else could nonsense spread with such efficiently that there is currently an epidemic of a disease in a nation where it was eradicated?




You clipped my quote. If Image Quality is a property of the sensor, then all Images produced using the same sensor (at same gain) must be of equal Quality, agreed?

Since that is clearly inconsistent with reality, the premise must be wrong, regardless of what reviewers all over the Internet say.

Those same reviewers would claim that every Image I make with my D7100 is of higher Quality than every Image I make with with my 5D3, and that both are always bested by my A7R. Neither claim is true. The Quality of my final Images depends on a hell of lot more than the sensor I happen to capture the initial data with.

110
EOS Bodies / Re: Big Announcements Coming Next Week [CR3]
« on: January 27, 2015, 09:30:04 AM »
Sony just announced today the next generation of big MP and yes it is a 50mb version.  Now this is interesting are we going to see a sony sensor in a canon? 

I hope not.

If it meant that Sony was the only game in town, I'd agree. But Toshiba, Aptina, Samsung, etc. are producing viable sensors, so if Canon has decided it isn't worth keeping the line going, I couldn't care less.

None of them make a dual pixel sensor that I know of.

Fair enough.

Personally, in a camera like this, I'd put higher priority on the noise and signal chain characteristics than whether it can do phase detect with the sensor (particularly since I would likely often pair it with MF lenses)

111
EOS Bodies / Re: Big Announcements Coming Next Week [CR3]
« on: January 26, 2015, 11:15:46 PM »
Sony just announced today the next generation of big MP and yes it is a 50mb version.  Now this is interesting are we going to see a sony sensor in a canon? 

I hope not.

If it meant that Sony was the only game in town, I'd agree. But Toshiba, Aptina, Samsung, etc. are producing viable sensors, so if Canon has decided it isn't worth keeping the line going, I couldn't care less.

112
EOS Bodies / Re: Big Announcements Coming Next Week [CR3]
« on: January 26, 2015, 08:07:11 PM »
I'm still proceeding under the assumption that the "big megapixel" camera is actually a DPAF sensor where the megapixel count of images will be half that of the number of photosites.  So, I'm expecting a 26-ish mp camera.  Which would be fine with me, I don't need and truthfully can't handle (processing) over 50 megapixels.

Is the 70D specified as a 40 MP camera?

No.  But the talk prior to it being released was that there was a 40-something mp APSC camera coming.  So, I'm just going under the assumption that this talk is exactly the same scenario.  Talk of high mp that actually turns out to be high photodiode.
I doubt it. Canon has spent significant dollars developing and producing new leases with pretty spectacular performance (so much so that, on average, the 5D3 out resolves the D800, even though it has 14 million fewer pixels). I have long suspected that they were doing that in part to prepare for a higher-resolution body (rather than doing it in the other order).

113
EOS Bodies / Re: Canon EOS Rebel 750D Spec List [CR1]
« on: January 26, 2015, 11:49:03 AM »
Yes. I wrote enthusiasts and hobbyists. There are many other people, not even stupid, who still buy it. He who has time and knows, is waiting....

I presume that the overwhelming majority of DSLR customers of all brands are hobbyists.

Is it possible canon will release a camera with a little extra shadow detail at base ISO? Possibly. If so, and if it's compelling and meets the value analysis, I'll buy one. There is very little I could do with a D810-type of camera from Canon that I can't do with my 5Ds, so why should I wait? (I own an A7R, but it rarely leaves the closet).

114
EOS Bodies / Re: Canon EOS Rebel 750D Spec List [CR1]
« on: January 26, 2015, 10:29:20 AM »
... no conscious hobbyist or enthusiast is buying Canon except 7D II for particular reasons.

I realize that amazon's figures are short-sighted, but lacking anything else it works in a pinch to determine whether anyone is buying Canon's other than the 7D2.

The answer is: yes. People are buying the T3i, T5, 70D, T5i, 6D, T3, 5D3, and the 60D, and currently more often than the 7D2. Canon may not be dominating the market like they did when they had the only CMOS game in town, but they certainly aren't losing.

115
EOS Bodies / Re: 50mp Cameras Coming in March [CR1]
« on: January 26, 2015, 10:15:43 AM »
My personal definition of "gimmick" would be "feature that is easily substituted by other means".

Can't say I agree. Your definition of a gimmick is my definition of a convenience.

A gimmick must be of marginal value. To me, GPS in a camera is gimmicky, but not because I can carry one in my pocket. It's a popular acronym to put on a box to gather the attention of shoppers. "Oh look Susan, this one has GPS." Gimmick (to me).

But some things which I initially view and gimmicky quickly lose that stigma. I thought fingerprint readers on cellphones were gimmicks, until I started using a phone which has one. Maybe the same would be true if I had an SLR with GPS (though I have the geotagging in my phone disabled, so I doubt it).

In thinking about it, if I had $5K to spend I would do so on an high end lens like the Zeiss Otus 85mm rather than upgrading my 5DIII. ... But a high quality lens has a much, much longer life cycle.

I've had my cameras for 9 and 10 years.  I've only had one lens that long.

I'm betting none of the lenses you got rid of were on par, quality wise, with an Otus.

116
EOS Bodies / Re: 50mp Cameras Coming in March [CR1]
« on: January 25, 2015, 01:36:07 PM »
...
But concerning clean shadows: Your wish is granted instantly, because the 1dx/6d sensors are a *big* leap from the 5d2. I recently shot with a 5d2 from a friend of mine and was stunned how much banding it produced after postprocessing operations that I do with the 6d raw files all the time.

The 5D3 was released after the 1DX so just because a camera is a "later release" from Canon means nothing. The problem was the 5D3's sensor is more like they took the 5D2 sensor and just put it back in the oven to reheat. Will  Canon do that again? Wait and see.

One thing is clear: a ~50MP sensor is new. It's not a derivative of any full frame sensor Canon has ever produced.

As for the 3 vs 2, I have both, and my 2 collects dust even if I'm shooting manual focus on a tripod. Why? It's better.

117
EOS Bodies / Re: Purchase 5DIII now, or wait for 5DIV?
« on: January 23, 2015, 02:38:21 PM »
You're talking about a camera (5D4) that is not even at the horizon although some talk about a potential announcement in 2015.

Canons Camera Division Executive  Masaya Maeda has twice confirmed that a new  high megapixel camera is coming soon. He mentioned it the first time back in SEP 2014.

A new high megapixel camera isn't necessarily a 5D4, which is the topic at hand. It could easily be a 1DSx, 1DS4, or some new line.

118
EOS Bodies / Re: Global Shutter Coming to Canon DSLRs? [CR1]
« on: January 23, 2015, 09:36:00 AM »
I'd like to hear why people want a very fast sync speed.  I know quite a lot about this topic and can see direct applications for sync speeds up to about 1/1000th, but at that point applications get a lot more limited.

Yah, it's limited. Shooting for foreground detail (e.g. faces) with the solar disk in frame at narrow DOF is one such usage. But if the capability is there as an artifact of development (specifically the rumored frame rate goal), I won't complain. Chances are I'd use higher than 1/200 fairly often, but 1/1000&faster sparingly.

119
EOS Bodies / Re: Canon EOS Rebel 750D Spec List [CR1]
« on: January 22, 2015, 02:57:27 PM »
If the were to use a 1.5 crop sensor instead of the 1.6, then the could make a variable aspect ratio like some of the micro 4/3 cameras for movies and still with the same angle of view.

I presume EF-S lenses are designed to just cover canon's APS-C frame, so they would likely have to disable the outer perimeter of a larger sensor, such as the ~24MP Toshiba used in the D7100 and D5200.


That is correct, the crop factor is unlikely to change.  The image circle projected by the lens would likely vinette on a corners of the 1.5 crop sensors.  However, you could probably fit a 1.6 crop factor image circle with a 16:9 or 16:10 aspect ratio on a 1.5 crop sensor.   So instead of cropping off the top and the bottom of the sensor, we could extend the sides of the sensor to get the same aspect ratio, and have the same angle of view.

By my math, an image circle which circumscribes a canon APC-C (22.3×14.9 mm) sensor is 26.8mm in diamater.

Maximizing frame width on a "DX" (23.5mm×15.6mm) sensor using that lens at 16:9 aspect ratio would be: 22.9mm×12.9. So yes, you'd get more sensor area.

120
EOS Bodies / Re: High Megapixel Camera Coming in 2015 [CR3]
« on: January 22, 2015, 10:01:14 AM »
IQ is a property of the sensor.

Therefore all images produced by the same sensor are equal in quality. Or, granting wiggle room for sensitivity: therefore all images produced using the same gain on the same sensor are equal in quality. Naturally, this also means that images produced without a sensor, e.g. by film, have no quality.



In reality, image quality is a subjective term. It is a property of the image viewed, and varies by viewer to viewer. There are certain objective measures of sensor performance, but none of them should be summarized as "image quality".

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