LX3 in bright sunlight

Detail Man said:

Detail Man wrote:

I use the same (50% to 100% of the Live Histogram reading) "rule of thumb" when shooting in RW2 as well as "Fine" JPGs ...

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SHOULD READ :

I use the same (50% to 70% of the Live Histogram reading) "rule of thumb" (with 60% being a good target-reading to aim for) when shooting in RW2 as well as "Fine" JPGs ...

Detail Man said:

(1) Go to and press the "Edit your settings" button at the top-right of your DPR Gallery main web-page;

(2) Go to the "Privacy and Safety" tab web-page section;

(3) Under the "Allow downloads of Originals" status (located at the bottom of the "Privacy and Safety" web-page section), select "Allow" (which is not the default setting).

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I seem not to have this. The button in the top right hand corner says 'edit mode on and off' and there's nothing about allowing downloads of originals in the privacy and safety tabs.

Francis E said:

Francis E said:

Detail Man wrote:

(1) Go to and press the "Edit your settings" button at the top-right of your DPR Gallery main web-page;

(2) Go to the "Privacy and Safety" tab web-page section;

(3) Under the "Allow downloads of Originals" status (located at the bottom of the "Privacy and Safety" web-page section), select "Allow" (which is not the default setting).

Click to expand...

Click to expand...

Francis E said:

I seem not to have this. The button in the top right hand corner says 'edit mode on and off' and there's nothing about allowing downloads of originals in the privacy and safety tabs.

Click to expand...

You are (as per my erroneous statement) describing your DPR Gallery web-page. My mistake in what I wrote. Sorry. You need to go to your DPR Profile main web-page* (where your DPR gallery is only one of the multiple tabs that can be selected). Instructions are (otherwise) accurate.

Detail Man said:

You are (as per my erroneous statement) describing your DPR Gallery web-page. My mistake in what I wrote. Sorry. You need to go to your DPR Profile main web-page* (where your DPR gallery is only one of the multiple tabs that can be selected). Instructions are (otherwise) accurate.

Click to expand...

OK, done, thanks.

Francis ,

Here is your (first) posted (1024x576 pixel-size) JPG with LX3 Exposure Compensation =0.0 EV (which caused "Flashing Highlight" indications on your LX3). The DxO Optics Pro 6.60 (and the PaintShop Pro 9.01) RGB histograms of the original image posted does not show more a very tiny (virtually insignificant) amount of color-channel "clipping" taking place:





Here is that posted image processed using DxO Optics Pro 6.60 (DxO LX3 JPG Optical Corrections Module used) with the (DxO) Exposure Compensation set to -0.60 EV :





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Here is your (second) posted (1024x576 pixel-size) JPG with LX3 Exposure Compensation = -1.0 EV (causing no Flashing Highlight indications on your LX3). The DxO Optics Pro 6.60 (and the PaintShop Pro 9.01) RGB histograms do not show any amount of color-channel "clipping":





Here is that posted image processed using DxO Optics Pro 6.60 (DxO LX3 JPG Optical Corrections Module used) with the (DxO) Exposure Compensation set to +0.40 EV .





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All DxO Optics Pro 6.60 processing parameter settings were identical - except that the (DxO) Exposure Compensation was set (a net) 1.0 EV higher than it was in the case of the (DxO processed) first image (above).

Note that the difference in the LX3 Exposure Compensation between the two shots was exactly compensated for the by the difference in DxO Exposure Compensation settings during processing - yet there appears (to me) to be clearly visible differences in the amount of image-details in the two processed images .

Since your first-posted (higher exposure-level) JPG image has virtually no actual color-channel "clipping", the visible differences are not due to any significant image-sensor non-linearity that the LX3 is able to alert you to the existence of (via the "Flashing Highlights" indicator in Review, or in Playback, mode viewing).

It is my experience that the "flashing highlights" indication does not exist when the Live Histogram does not (itself) report (composite RGB color-channel luminance) "clipping".

I believe that the differences in visible image-details demonstrates non-linearity of the CCD image-sensor photo-sites of the LX3 (which occurs prior to a 100% reading on the Live Histogram, and the corresponding "Flashing Highlights" indication in Review, or in Playback, mode viewing).

The existence of such suspected image-sensor photo-site non-linearities is precisely why I recommend restricting the Live Histogram reading to between 50% and 70% of full-scale reading (when using center-weighted metering) - which corresponds to reducing the LX3 exposure-level (from the Live Histogram and Flashing Highlights maximum levels) by between 0.5 EV and 1.0 EV.

DM

Francis ,

I've been looking at some of your images at your web-site. I see that you do quite a bit of work in direct first-reflection sunlight. You mentioned that you also had SLR(s). Is it (or are they) film format? Some of them look like film - and have no EXIF data (as if perhaps scanned from film/slide).

I see that you have a conservative approach to color saturation levels and contrast settings, and it appears that no shadow-tone "clipping" whatsoever appears to occur in the majority of your images. It's good to know your familiarities, preferences and tastes. Everybody envisions differently

Found some of your LX3 images. This one is a great example of the kind of delicate flower-petal details that (I find) can be best resolved only in indirect natural lighting at base ISO (ISO=80 in this case). Looking closely, there is quite a lot of good flower-petal detail existing in this image's data:





https://picasaweb.google.com/ferrymanau/HeverCastleJune2011#5614256403909400498

DM

Detail Man said:

You mentioned that you also had SLR(s). Is it (or are they) film format? Some of them look like film - and have no EXIF data (as if perhaps scanned from film/slide)

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Hi,

Yes, in some cases. The images on my Picasa site go back to the early 1990s when I was living in Hong Kong and shooting film with several cameras including a Leica R6. I scanned a selection and they are mainly in the album 'My Photo Album'.

But some of the pictures in earlier albums on the site were also 'saved for the web' in CS, and I didn't realise until someone pointed it out to me that this eliminates the .exif. At that stage I wasn't as interested in the details as I later became. From 2008 onwards, though, the .exif should be visible.

Thanks for this and your previous post which, as always, I found very useful and informative.

I am interested in technical matters which would enable me to understand why I'm getting things like blown highlights, but in general I would say that my priorities are to take pictures that I, and hopefully my friends, like. Some tolerance of faults is perhaps allowable!

Kind regards