March 02, 2015, 06:35:01 AM

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - Bengt Nyman

Pages: [1] 2 3 4
1
EOS Bodies / Re: What's Next From Canon, NAB and Beyond
« on: February 07, 2015, 10:13:14 AM »
You asked for an explanation of Canons mirrorless strategy.
Here is my guess:

Canon's mirrorless cool might be right after all.
The opposite is represented by a misleading and trashy rumor site which claims that Sony is aiming to become the king of cameras.
Sony's real ambition is to remain the world leading supplier of image sensors, not cameras or lenses.
Sonyalpharumors has in its ambition the earn provision on Sony sales misled the public to believe something else. The result is a large number of disappointed buyers with excellent but short run, experimental Sony cameras and unrealistic expectations.

The delay of the final, ultimate, mirrorless FF camera is caused by three factors:
1. Many photographers still prefer the clear, live view offered by an optical view finder.
2. Ultra fast PD auto focus also benefits from the above.
3. The ultimate mirrorless FF camera will have a flange distance between 22 and 26 mm which requires a full range of new, high resolution lenses and new lens mounts.

The emergence of a professional, FF mirrorless camera system will consequently take some time, giving both Canon and Nikon plenty of time to adjust to the shrinking reality of the dedicated, single purpose camera industry.

2
Canon General / Re: Photographer Petitions Canon for Left Handed Camera
« on: January 26, 2015, 01:49:26 PM »
I do not expect Canon to act on this, but I think that a left hand conversion would be a good product for third party accessory manufacturers like: Pixel Vertax, Flashpoint, Phottix, Meike, Bower or Hahnel.

3
EOS Bodies / Re: Canon Confirms Development of High Megapixel Camera
« on: January 01, 2015, 06:27:51 AM »
I used to shoot different Canon 5DXXX with zoom lenses and I got good results. However, there came a time when I wanted better resolution. So I switched brand and decided to use strictly prime lenses. The result has been excellent and so far I have stayed on that path. The higher resolution image sensors plus the prime lenses gives me a new freedom to crop radically if and when needed.

It will be very interesting to see images from the new 52 MP Canon image sensor.

My real concern has to do with lenses. Having had extensive experience with Canon lenses I am convinced that Canon will have to invest in higher grade lenses for the 52 MP camera.

Every lens has its own maximum resolution and the weakest link, whether it is the lens or the image sensor sets the maximum resolution for the pair.

A lens that produces an image PMP close to the MP of the camera is a superior lens with the ability to do better on a better image sensor.

For example, The Zeiss Otus 55mm produces 21 PMP images on a 5DIII 23.4 MP sensor.
The same lens produces 33 PMP images on a 36 MP sensor.
This lens will probably produce close to 45 PMP images on a 52 MP sensor.

The Canon 24-70mm zoom lens produces 18 PMP images on the 5DIII 23.4 MP sensor.
This lens would probably produce around 25 PMP on a 52 MP sensor.

Every lens will produce a little bit higher image resolution on a higher resolution sensor, however, for most lenses the difference will not be worth spending the money on a better camera. A better camera in most cases also needs better lenses.

The new 52 MP Canon sensor and a new line of high resolution lenses sounds like a very expensive proposition for Canon. It will be interesting to see the final retail prices for the 52 MP camera and corresponding 40 PMP lenses, or if Canon settles for producing lenses for 30 PMP images to match present Nikon D810 camera and lens performances.
 

 

4
EOS Bodies / Re: Canon Confirms Development of High Megapixel Camera
« on: December 26, 2014, 01:13:42 PM »
Thanks for demonstrating why rating lenses based on data that has been obtained via a setup with more then one variable is less then useless.
Correct.
Your clue to the absolute performance of a lens is to compare the PMP of the lens to the MP of the sensor.
If a lens produces 21 PMP on a 22 MP sensor you know that it has the potential to go beyond 22 PMP.
Whereas a lens producing 21 PMP on a 36 MP sensor has already reached its own resolution limit.
The only way to know for sure would be if the industry started publishing charts showing image contrast as a function of line pair density. Today they typically only publish MTF charts based on a couple of very low line pair densities, typically 10 and 30 LP/mm. A 36 MP sensor corresponds to 104 LP/mm and a 50 MP sensor corresponds to 144 LP/mm, so you would like to know how the lens performs in this area.

5
EOS Bodies / Re: Canon Confirms Development of High Megapixel Camera
« on: December 26, 2014, 12:32:06 PM »
Many of Canon lenses would be good enough for a 100 MP FF sensor, at least at f/4.
Sure, if you settle for a 20+ PMP image. But if you do, why pay for a 100 MP image sensor.
Canon's sharpest lens reaches 20 PMP on the 22.3 MP sensor. I would not expect it to reach over 30 PMP on a 100 MP sensor. If it does Canon is leaving money on the table every time they make this lens.

6
EOS Bodies / Re: Canon Confirms Development of High Megapixel Camera
« on: December 26, 2014, 06:47:15 AM »
Almost all Canon's current lenses would do just fine on a 50MP full frame sensor, and the better ones would excel.
If you are used to images from a 24MP sensor and accept that level of quality, I agree.
However, if you expect to take advantage of the 50MP sensor and see closer to 40PMP images you are dead wrong.

7
EOS Bodies / Re: Canon Confirms Development of High Megapixel Camera
« on: December 26, 2014, 06:39:24 AM »
The high pixel sensor will cause serious problems on the optical side. For example, if you go to DXOMark, there is nearly no lens able to match the 36 MP Sensor of a Nikon D810.
I agree with most of what you said, except for accepting a limited sensor resolution for that reason.
I shoot D800E and D810 with the best AF primes available up to 300mm f/4, not to be a snob but to keep my equipment light.
I use liberal cropping rather than soft zoom lenses to produce my final images.
I agree that for high sensor resolution to make sense the lens PMP should reach reasonably close to the sensor MP.
 

8
EOS Bodies / Re: Canon Confirms Development of High Megapixel Camera
« on: December 26, 2014, 06:13:53 AM »
While we are waiting for Canon and Nikon to introduce pro level, FF, mirrorless cameras, Canons announcement about a 50 MP Bayer? DSLR? might seem a bit odd. Especially considering that Canon presently offers no lenses that would give justice to a 50MP sensor. At the same time Canon admits the need for a new line of lenses. The real reason why both Canon and Nikon are having difficulties breaking into pro level, FF, mirrorless cameras has to do with lenses, and more specifically with lens mounts. A properly designed mirrorless camera takes advantage of a shorter flange distance. Hopefully not as short as Sony's 18mm, but not as long as Nikon's present 46.5mm or Canon's 44mm.
If Canon managed to bring out an innovative DSLR? using a shorter flange distance, say 25-30mm, and a new line of high resolution lenses, Canon would be in a superb position to smoothly transition into pro level, FF, mirrorless cameras.
With a little foresight this new lens mount would have a large enough throat diameter to allow for an adapter to present EOS lenses.
Whichever ways Canon and Nikon choose to get to pro level, FF, mirrorless cameras,  I predict some interesting camera days ahead.
 

9
The built in extender is good idea.
I would like to see it applied to top quality non-zoom primes, like for example a 100mm X2, a 200mm X2 and a 300mm X2. The optical priority should of course be on the prime with the extender producing better results than a 2X crop.

10
Lenses / Re: New EOS-M Lenses Soon [CR2]
« on: January 17, 2013, 04:36:32 AM »
Canon came late to the game, and they should have gone with a full frame sensor. A FF mirrorless from Canon could have shaken things up.
Agreed !!

11
EOS Bodies / Re: The Mirrorless Future
« on: September 19, 2012, 12:04:12 PM »
That's no good.
I agree with you. I am making a case for mirrorless because of its many other advantages. But you are right; the time to focus and some buyers fear of EVF is still a hold back. However, both of these are in the path of better chip technology which the semiconductor industry is very good at. I believe that in a couple of years it will be a mostly mirrorless market with a few DSLR holdovers.
I am prepared to buy a Sony RX1 right now. If there was an RX2 with interchangeable lenses or even with a hard mounted Zeiss 50-200 zoom I would buy that too.
 

12
EOS Bodies / Re: The Mirrorless Future
« on: September 18, 2012, 04:46:16 AM »
150 msec????? This is sooo s---l---o---w. I guess that camera is not for me after all.
It's in the order of a young mans reaction time. Therefore a young man with a Sony RX1 would keep up with an old man with a DSLR.

13
EOS Bodies / Re: More Big Megapixel Talk
« on: September 18, 2012, 04:38:52 AM »
Just curious why Nikon can do it but Canon can't.
Hi bdunbar 79
Why do you say that Canon can't ? Maybe I didn't understand your question.

14
EOS Bodies / Re: More Big Megapixel Talk
« on: September 17, 2012, 06:14:44 PM »
Speaking of the D800, is it true in Nikon cameras, when you are in auto ISO, you can still do EC?
You can do EC (Exposure Compensation) in both manual ISO and auto ISO. Auto ISO does not alter your exposure (ISO+aperture setting+exposure time) it only tries to optimize ISO for the exposure that you or the camera have selected, be it a compensated exposure or not.
You would normally not select auto ISO (or EC) in full manual mode since it would rob you of full control.   

15
EOS Bodies / Re: The Mirrorless Future
« on: September 17, 2012, 02:35:55 PM »
The FF sensor in a body like the Fujifilm XPro-1 would be very desirable
Look at the new Sony RX1.

Pages: [1] 2 3 4