January 31, 2015, 01:20:14 PM

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Messages - sanj

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1
Magiclangern provides a button to "expose to the right". Adjust exposure in postprocessing to fit your needs. Problem solved, case closed.

And how, exactly, do you do that? Because if you are using the 'Blacks', 'Shadows', 'Exposure', 'Highlights', or 'Whites' sliders you are not getting the tonality of the scene.

If you use tone curves on each colour channel seperately, if you are using the camera calibration panel etc then yu might be getting close.

You seem to be missing the point that 'simple' adjustments to an overexposed file do not get you back to the same tonality as a 'correctly' exposed file.

The RAW data is linear. If you expose to the right, you just collect more photons. In software you have to reduce (or increase) the exposure by the same amount that you adjusted while taking the picture. Then you have the same raw data without blown highlights (when decreasing exposure taking the picture) or with less noise (when increasing exposure when taking the picture).

You do not need to change the channels separately. You do not need to change the tonality curve.

The required correction is only one single value. E. g. +2EV while taking the picture and then -2EV to reverse that effect in software.

That is the theory and software which does that is fine but there are many things that can go wrong. One big difference is the tonality curve of the camera (software) which is applied to convert linear RAW data to JPEG values. You cannot work with those JPEGs, you need linear RAW. But even then the RAW is preprocessed by software and that might do some things like change the color of dark/bright parts. E.g. reduce the color of dark parts to avoid color noise.

You can simply test your software. Switch to manual mode and take a photo of some dark objects before a dominant white wall and expose like the camera would do (make the white wall grey). Then expose to the right and remember how many EV you increased the exposure. E.g. 1/100s camera exposure vs 1/25s ETTR exposure = +2EV. Then use the RAW files and convert them with your software and apply -2EV exposure to the second picture. Now they should have EXACTLY the same color properties but the ETTR picture should have less noise. If not, your software is not up to that specific task.

Using the camera JPEGs here will lead to totally wrong colors, banding etc. due to all the "optimizations" applied to the RAW data in order to get good looking JPEGs.


At the end of the day the goal is to take a picture and to expose for that specific subject and the sensor noise may actually be low enough that you are satisfied with the exposure suggested by the spot metering of the camera. In that case you can directly use the camera JPEGs and be fine. Heavy postprocessing is only for low volume activities or people with too much time.

I work 24/7 but still process my pictures to my satisfaction. Guess I have enough time for what I WANT in life.

2
Oops...I made the erroneous assumption that anyone reading the LuLa article and basically subscribing
to the ETTR mantra would be shooting for RAW capture and...doing his own PP.  My bad!     ::)

:) :) hahahaha

3
EOS Bodies / Re: POLL: How many mp do you want anyway?
« on: Today at 06:25:19 AM »
I wonder: ???
If many here want 36 megapixel, why D800, D810, A7r are not big sales successes? ::) :-X

I do not know if they are successes or not, but if they were utter failures, there is no way Canon would be coming out with 50 mp camera.

4
Not excited.  ISO 6400 camera is not for me.  Where is 5D MK4?

Really? Hmmm

5
The true specs will decide but looking at those specs it's very meh.

Beauty is in the eye of the be holder - I'd get one in a flash.

Me too… Will order as soon as I decide between the S or normal.

6
EOS Bodies / Re: More About the EOS 5DS & EOS 5DS R
« on: January 30, 2015, 10:46:02 AM »
Ugh so I'm gonna have to buy two cameras this year? One for portraiture and one for events?

NOOOOOOOOOO

You already have one for events. Did your 5D3 suddenly become useless?

ahahaha. well said!

7
EOS Bodies - For Stills / Re: Firmware: EOS-1D X Version 2.0.7
« on: January 29, 2015, 07:41:22 AM »
Thanks Canon for this. But it took you approx 3 years to figure out these issues? Really?

8
Portrait / Re: The New Guy
« on: January 28, 2015, 10:36:41 PM »
Congratulations. Love his smile...

9
It seems like you do not need the 1dx. I think a cheaper, smaller camera will be more appropriate. Am going by "need to save money for vacation."

10
EOS Bodies / Re: A Sony & Canon Sensor Partnership Mentioned Again [CR1]
« on: January 28, 2015, 11:24:28 AM »
This is good. Right?

11
EOS Bodies / Re: Big Announcements Coming Next Week [CR3]
« on: January 28, 2015, 11:23:06 AM »
Until they step into 2012 and put 4k RAW video in the cameras... I don't care. Even GoPro has 4K footage now... Canon is turning into the Apple of the camera world.. forever playing "catch-up."

I sold my 5Dm3 last year and moved to RED cameras. i WISH they'd make a 4k RAW camera so I could pick one up for backup.

You don't shoot stills right? 5d3 is a stills camera. A very nice stills camera.

12
Landscape / Re: Railway odds and ends...
« on: January 26, 2015, 11:25:48 AM »
Taken on a Minolta x-500 with a Vivitar 400mm lens.  Scanned with a Minolta Dimage 5400 Scan Elite.  As I recall the stock was something fairly vanilla like Superia 200.

This was actually for an assessment, I was doing a photography module at University, I printed this mono conversion onto inkjet foil, looked pretty good.


A really nice image!  :)

Yes beautiful!

13
EOS Bodies / Re: 50mp Cameras Coming in March [CR1]
« on: January 25, 2015, 12:10:19 AM »
Our favorite expert says "D800E is very slightly sharper, and somewhat more susceptible to moiré patterns and aliasing artifacts.

Aliasing and moiré are potential problems only when photographing man-made things like fabrics, brick walls, screens and tiled roofs that have fine, repeating patterns. The only other potential problems are when photographing star fields or sparkles from the sun on the tops of waves on the sea.

Moiré never happens with natural subjects, except if you're a bug photographer. In any case, you have to work at it to find subjects for which aliasing and moiré are problems, so for me, the slight sharpness improvement of the D800E is more than worth it."

14
EOS Bodies / Re: 50mp Cameras Coming in March [CR1]
« on: January 24, 2015, 11:00:22 AM »
Will this be the first time Canon comes with two versions? I so doubt this….

15
EOS Bodies / Re: 50mp Cameras Coming in March [CR1]
« on: January 24, 2015, 10:53:30 AM »
I gave up waiting and bought a 645z

Don't hate me.

Good for you!!! How cool.

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