January 27, 2015, 04:22:11 PM

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Messages - Lee Jay

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1
EOS Bodies / Re: Big Announcements Coming Next Week [CR3]
« on: Today at 03:10:24 PM »
If we see a 50+ MP sensor in a Canon professional camera it will be interesting to see how older lenses still in manufacture hold-up. Higher resolution lenses properly corrected for chromatic abberations & color fringing will be expensive to make, so expensive that for many they will not be affordable its not just the glass but the mechanical tolerance to make that glass work optimally all the time.

This is no more pixel density than the 70D, and even an 18-135STM holds up quite well on that camera.  So, any lens with quality equal to or better than a relatively cheap but decent consumer hyperzoom will hold up just fine.  Now, the 18-135 is an EF-s so that makes it easier to design and cheaper, but the same thing should hold for lenses like the 24-105STM.  Lenses like the 16-35IS, 24-70II, 70-200II, 100-400II and basically all the L-primes and decent consumer primes (24/28/35/85/100) will be just great.

2
EOS Bodies / Re: Big Announcements Coming Next Week [CR3]
« on: Today at 08:50:34 AM »
People are going to argue black and blue that I'm wrong for doing this, but I'm not going to buy a new DSLR from Canon (or Sony!) - regardless of how good the sample images are - until it's been tested and evaluated by DxO.

Why?

Because scores aside, their methodology is fixed and the same for every model.

Thus I can look at their sensor measurements for noise and DR and get an independent view on where Canon are at with their new cameras relative to other cameras.

And to not put a finer point on it, I don't trust Canon to deliver significant IQ improvement just because it is a new FF sensor on a new camera.

I've recently found many of their measurements to be self inconsistent (different QE at different ISOs) and thus clearly wrong.  Some of them are different by a factor of two!  Unless you're going to analyze their data very carefully, I'd just ignore them.

And have you run your own tests to show that the QE is the same at all ISOs for those very same cameras?

No need.  It can't change.  To change it would require changing the physical structure of the sensor.

3
EOS Bodies / Re: High Megapixel Camera Coming in 2015 [CR3]
« on: Today at 08:49:31 AM »
Why constrain yourself with what Canon offers?

Because they make the best cameras, the best lenses, and the best overall system, and the only constraint is at an ISO I use for perhaps 15% of my shots.

4
EOS Bodies / Re: Big Announcements Coming Next Week [CR3]
« on: Today at 07:56:41 AM »
People are going to argue black and blue that I'm wrong for doing this, but I'm not going to buy a new DSLR from Canon (or Sony!) - regardless of how good the sample images are - until it's been tested and evaluated by DxO.

Why?

Because scores aside, their methodology is fixed and the same for every model.

Thus I can look at their sensor measurements for noise and DR and get an independent view on where Canon are at with their new cameras relative to other cameras.

And to not put a finer point on it, I don't trust Canon to deliver significant IQ improvement just because it is a new FF sensor on a new camera.

I've recently found many of their measurements to be self inconsistent (different QE at different ISOs) and thus clearly wrong.  Some of them are different by a factor of two!  Unless you're going to analyze their data very carefully, I'd just ignore them.

5
EOS Bodies / Re: Big Announcements Coming Next Week [CR3]
« on: January 26, 2015, 11:29:27 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.

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

6
EOS Bodies / Re: Big Announcements Coming Next Week [CR3]
« on: January 26, 2015, 11:13:46 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.

7
EOS Bodies / Re: Big Announcements Coming Next Week [CR3]
« on: January 26, 2015, 09:34:28 PM »
That's a lot of new and diverse stuff.  Something for everybody!  :D

Guessing not for me.

I'm interested in a dual-pixel (and updated) version of the 5DIII or 6D, and this doesn't sound like it (maybe, though - 5DIV?).  I'm not remotely interested in a $3,000 11-24 or an any-price M3 or 750D.

8
Canon General / Re: Photographer Petitions Canon for Left Handed Camera
« on: January 26, 2015, 01:46:22 PM »
This seems to me like the perfect case for aftermarket 3D printing.  Understanding that the body would be a different material, not as durable, weather sealed, etc. - but I would think someone savvy could redesign a new body and adjust the wiring in such a way that it would fit.

That's not very realistic, I'm afraid.
The production cost would exceed the price of the camera itself by far, yet you propose to "adjust the wiring" and therefore to take an existing camera apart. You'd end up with some hackish DIY camera for the price of 2 or more 5D3R's without any warranty whatsoever. Nobody would buy it.

Adding an accessory like a grip to the existing camera is a lot more realistic.

Yeah...but I wonder if a 3D-printed grip that plugs into the remote release port, screws onto the tripod thread, and has nothing in it but a shutter release system would do the job, and not be that expensive.

9
Canon General / Re: Photographer Petitions Canon for Left Handed Camera
« on: January 26, 2015, 12:05:11 PM »
Anybody heard of Steve McCurry?

https://www.youtube.com/watch?v=NLgd6isBAoM
I've posted this each time I've seen this story - I'm not sure how anyone in her situation could miss that.

His approach wouldn't work at all in this case.  He holds the camera's weight with his right hand through a mini tripod or bar.  This lady doesn't have use of her right arm.

10
EOS Bodies / Re: 50mp Cameras Coming in March [CR1]
« on: January 26, 2015, 10:41:13 AM »

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

And that helps explain some of the completely irrelevant extrapolations you come out with so often.

I have newer cameras too, and I have astro stuff.  I have pixels from 8.2 microns to 1 micron and focal lengths from 15mm fisheye to 5600mm.

There's nothing wrong with my testing and I've done loads and loads of it for many different purposes.

11
EOS Bodies / Re: 50mp Cameras Coming in March [CR1]
« on: January 26, 2015, 09:19:44 AM »
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.  My reasoning is that such a lens makes every one of my cameras instantly better. There is no doubt of this. That even includes my IDs II (that I use for time lapse sequences and landscape) and my 650D.  It makes my videos better too.  If I were to buy a 5DIV or  or whatever they call it in the future or a IDx when the price drops, then that lens would make those cameras better too.  Cameras will come and go on a fairly short 3-4 year life cycle because Canon and other manufacturers have to make a profit.  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.

12
EOS Bodies / Re: 50mp Cameras Coming in March [CR1]
« on: January 26, 2015, 09:09:13 AM »
For those the "rubbished" the idea of more sensitivity / DR and going beyond the human eye I encourage you to go to Image Sensor World blog and go to November 25th and read the Sony investor update.

Like the slide entitled, "Concentrate on expanding market for mobile, IP Security cameras and automotive"?


13
EOS Bodies / Re: 50mp Cameras Coming in March [CR1]
« on: January 25, 2015, 06:09:28 PM »
Obviously the guys at Red & Arri have got it wrong then, obviously no one has a single shot with clipped highlights.

You do realize, I hope, that the Sony and Nikon sensor with more base ISO DR than Canon sensor do it by lowering the read noise, thus making shadows cleaner.  At the same exposure, they still clip at the same rate as Canon sensors.  The only way to get more DR is to shoot with less exposure and retain cleaner shadows.

14
EOS Bodies / Re: 50mp Cameras Coming in March [CR1]
« on: January 25, 2015, 05:45:11 PM »
You obviously dont speak for the majority. The current 36MP Sony sensor also in the Nikon D800 is 14ev and in cinematography / video 14ev is still not enough. Plenty of situations in landscape where more DR would be useful particularly in strong sun situations with deep shade.

I have more than 300,000 images under management in Lightroom.  I went looking for high-DR situations shot at base ISO.  I was not able to find a single image where my Canon sensors didn't have sufficient DR AND 1-2 more stops would have made the difference.  I found one situation shot at base ISO where 15-20 more stops would have done it, but not 1-2, and that was the only situation I found where I couldn't get enough DR at base ISO.

On the other hand, I have thousands of high-ISO shots where DR was severely constrained.

15
EOS Bodies / Re: 50mp Cameras Coming in March [CR1]
« on: January 25, 2015, 05:11:57 PM »
You are talking about one set of currently totally meaningless theoretical 'limits' that have been shown to not be hard limits.

Canon showed tech years ago that showed they were working on sub diffraction level imaging for consumer cameras and there are advantages to resolve below diffraction levels especially when using Bayer array covered sensors. Besides, lenses would have to far exceed diffraction limited resolution for the system, lens and sensor, to resolve them.

Do not attach any importance to 'diffraction limits' when thinking sensor resolution for consumer cameras.

What the heck kind of nonsense is this?

Diffraction limits aren't optional and you can only "beat" them in certain situations (like hard phase shift masks for lithography) under situations that have nothing to do with digital imaging.

When I calculate diffraction limits, I use knockdowns for Bayer masks and AA filters, but the results are absolutely applicable and I've confirmed them through testing.

That said, 50MP full-frame sensors aren't coming close to pushing the real-world resolving power of today's better lenses.

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