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Messages - K-amps

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EOS Bodies / Re: Patent: Multi Layer AF Sensor
« on: February 25, 2015, 12:32:42 PM »
Does this mean we should be debating the DR of autofocus chips? :O ;D

:-)  They certainly seem to have DR on their minds.... I bet the R & D area has DR on their Coffee mugs :-)

EOS Bodies / Re: DR from 5Ds will be 2 stop better then 7D mk II
« on: February 17, 2015, 02:00:33 PM »
Dynamic range won't help you become a better photographer!

Usually shoot with a pinhole camera?

EOS Bodies - For Stills / Re: Why not 16 bit files?
« on: February 16, 2015, 02:02:01 AM »
Jon, I was hoping that you would take a stab at this... I am a believer now.

Marsu, as always helpful, thanks everyone.

EOS Bodies - For Stills / Why not 16 bit files?
« on: February 15, 2015, 01:22:56 PM »
I do not claim to be as technically savvy , but the question hounds me, why does Canon not start using 16 bit files rather than 14 bit, why this 14 bit brickwall? Color depth, DR can certainly benefit from doing this. I accept that there will be an increase in file size, but many would happily take that if it gave them more latitude or IQ.

Can someone tell me what I am missing?

(Apologies, I came out of the 80's CD redbook thinking, where 16 bits were not enough, then came 18 bit converters, then 20... and finally we were happy at 24bit before DSD ruined the party...... There seems to be a reluctance in upping the Ante in Digital photography).

I believe Canon's banding has to do with the algorithms they use, its not a hardware issue. Granted there is some noise at the hardware level, but the banding is a software issue or so it seems.... an optimized algorithm would produce more uniform/ random grain that is not as ugly as vertical/ horizontally focused bands...

EOS Bodies / Re: DR from 5Ds will be 2 stop better then 7D mk II
« on: February 09, 2015, 10:36:43 PM »
But remember, better at Low ISO, worse at higher.... You can't get something for nothing......

Very true and if it does have 2 stop at 100, I might hit the pre-order button.... I already have a 5d3 for the high iso.
I am primarily a landscape guy.... usually shoot at base iso. This would be an excellent product IF that is the case.

EOS Bodies / Re: Could the 5Ds (R) be using the 5 Layer UV, IR, RGB Sensor?
« on: February 09, 2015, 07:30:24 AM »
Traditionally Canon has been conservative, I would not expect them to have this sensor in the 5ds
What do you think? When?

Can't say.... not soon. First they need to fix the DR many people are asking for... it is a threat to Canon if people defect, they would be interested in fixing this, but it seems they are not able to hence this stop gap 5Ds model...

I would expect new sensor tech in the 5d4 or 1dxii... towards Q4 to address the DR.

EOS Bodies / Re: Dynamic Range example please
« on: February 06, 2015, 08:54:39 AM »
Although this does not answer your question, it does demonstrate what Canon leaves on the table despite having the hardware to produce better results.

This is a magic Lantern function (google it) called dual iso: It takes one shot, and instead of 11-12 stops of DR, can give you up to 14-15. The shot below shows you what I mean.

The RAW is a canon RAW file pushed (shadow recovery) and the other is a dual iso version of the same shot/ similar exposure settings (barring the dual iso setting).

This is not exposure bracketing, it is one shot exposed for highlights (this is a crop to show the differences).

Again.... what Canon leaves at the table with the existing 5D3 hardware.

EOS Bodies / Re: Canon EOS 5Ds and EOS 5Ds R Preview
« on: February 06, 2015, 08:43:11 AM »

It's really easy, that's how I do it (obviously install ML for this):

1a. set Canon iso to 100, set ML's dual_iso to 800 or max. 1600 (it will show you how much dynamic range you gain, max is ~15ev).
1b. If you shoot Av/Tv, *underexpose* with ec to catch as many highlights as you want. Default is the amount if dual_iso, i.e. for 100/800 underexpose 2 stops. After the shot, look at the raw histogram to see if it's filled, clipped (increase dual_iso) or has space left (decrease dual_iso).

... the other way 'round is to set ML's dual_iso to 100 and Canon's iso to 800/1600 (or let it float), in this case you don't need to use ec. It's probably more intuitive this way as you simply get more shadow detail, but it's a bit more black box than an explicit underexposure.

3. After downloading the DUALxyz.cr2 files run ML's cr2hdr.exe on each of them, you'll get a 16bit raw dng. White balance will be broken even though cr2hdr tries to comput it, best option is to use ACR's "auto" wb.

Excellent Thanks Marsu42:

Where do I download the files from? Is there a Dummies for ML page with files and steps on how to use. I have never used it before.

EOS Bodies / Re: Canon EOS 5Ds and EOS 5Ds R Preview
« on: February 06, 2015, 02:23:17 AM »
So if Sony gives the world a 50mp sensor that has better IQ than the 5ds's sensor, I seem to recall a statement made by a certain Canon exec;

"We will use the best sensor available...."   too bad he didn't have a Crystal ball.

It's what many thought; a probable 180nm fab used, but "Voldemort" remains the same.

Time to try Dual ISO on the 5d3, any pointers to one page that gives me all the info needed, it's a task to go over 100's of pages in the ML forums....

Marsu42... any idea?

EOS Bodies / Re: Canon EOS 5Ds & EOS 5Ds R Image & Video Samples
« on: February 06, 2015, 01:56:07 AM »
Its not a Sony Sensor... Canon confirms this at the start of the video: 


Canon confirms, it is not a Sony Sensor: They are calling it a Canon sensor...


EOS Bodies / Re: Could the 5Ds (R) be using the 5 Layer UV, IR, RGB Sensor?
« on: February 05, 2015, 11:57:09 PM »
Traditionally Canon has been conservative, I would not expect them to have this sensor in the 5ds

EOS Bodies / Re: Sensor Fabrication
« on: February 04, 2015, 10:26:37 PM »
I doubt the article that states that Canon cannot go much higher over 21mp because of the 500nm fab, I seem to recall they did produce the aps-H sensor of 120mp around 2012 with that fab. And scaled up to FF... it will be higher.  The reason for staying close to 21 mp are many some of which are, file sizes, high ISO noise, market need, evolutionary designs, data buses etc.

EOS Bodies / Re: Best Lenses for the Canon 5Ds
« on: February 04, 2015, 12:04:55 AM »
Did they test the 180mm L? It's the sharpest lens I owned, it is not on the list, where as most lens I have now are on that list and the 180 was the sharpest lens I shot with.

Portrait / Re: Post your best portraits(street, studio, candid etc...).
« on: February 01, 2015, 08:27:24 AM »

Ashavari by Nοah Fence, on Flickr

I love the shadow detail on this, did you lower exposure in post on this?

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