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03-23-2009, 11:27 PM   #1
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Dynamic range 200% K20D

Hi All,

I have had the K20D for months but only just found the 200% dynamic range setting on the camera, never bothered to look.

Has anyone tested it and found much improvement on the DR on the camera ?

I haven't been out with the camera as such since turning it on, but I took a low light image looking at the curtains in the bedroom with just the lamp on and in the photo and noticed that the lamp had distiguishable features with the setting on, so that was quite promising.

Reason i ask is that i took a shot out last weekend of a night jetty scene and found the water reflected street lamp blew the highlights so I think this may make for a good improvement.

Image belowCheers
Neil



03-23-2009, 11:30 PM   #2
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OOPS i should mention this image is a Photomatix HDR image blended composite of 2 photos, one underexposed lowlights and one over exposed highlights. Not tone mapped.
Cheers Neil
03-24-2009, 03:34 AM   #3
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the 200% DR does a great job sometimes, this image from england turned out great, no PP other than crop and sharpening. Only one picture

03-24-2009, 06:22 AM   #4
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I leave it on most of the time, unless i really want 100iso - it does not do 'that' much but it does help in general and i've not really found it to have any draw backs.

its one reason i chose the k20d

03-24-2009, 07:48 AM   #5
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Just browsing through but I must say that is one stunning image you posted Neil. Just beautiful!
03-24-2009, 08:07 AM   #6
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It's about the same effect than selecting iso >= 200 and using highlight recovery in a raw converter, when shooting jpeg. When shooting raw all it does is limit auto iso to 200+
03-24-2009, 09:19 PM   #7
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I've used it and it does appear to work, but at the expense of shadow noise, even at low ISO. I'm sure I could probably handle it better, but I don't use it that much.
03-24-2009, 10:28 PM   #8
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QuoteOriginally posted by melander Quote
the 200% DR does a great job sometimes, this image from england turned out great, no PP other than crop and sharpening. Only one picture

I think I have been here before. Is this a little town in West Susex called Bognor Regis?

David

03-25-2009, 12:02 AM   #9
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Nice image, Neil!'

The DR increaser is really only for in camera jpegs, as you can't really recover the extra DR with post processing jpegs. If you shoot RAW, post process software can do a better job of boosting shadow detail without increasing noise as much as the in camera software does.

The in camera DR increaser actually shoots at ISO200, not ISO100, so you do gain a bit of an advantage by using ISO100 and boosting shadow detail without losing the ISO100 advantage in the mids and highlights - not that the difference in the highlights at ISO100 is much different to ISO200 anyway.

I think a few people have done some comparos with in camera DR increaser and post process DR increase and found that there was a slight advantage to doing it post process if you shoot RAW.
03-25-2009, 02:32 AM   #10
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St Bees in lake districs, beginning of the cost to cost walk.
03-26-2009, 11:32 PM   #11
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Thanks everyone for the replies.
I havent shot in raw for a while since i find the k20d is so good at jpegs.
Maybe something to explore for the future.
Cheers
Neil
03-27-2009, 03:42 AM   #12
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I've heard different storries about EDR.
-One is that it leaves raw intact and develops jpegs and preview thumbnails with +1ev. A ISO200 shot is actually ISO100 shot with -1ev and jpeg and preview thumbnails developed with +1ev. RAW is left intact. However there is a exif key that tells RAW developer to add +1ev before anything else.
-The other is pretty much the same with one exception - the RAW is processed (pushed +1ev) in 14bit hence the commercial talk about 14bit RAW processing even thou RAW files are 12bit.

whenn I still shot with K10D I used to keep ISO low nad shoot with -0,5/-1ev so I colud push up in converter and retain highlights. Now, with K20D, I'm using EDR all the time. Can't give any testimonial as I bought it jus a week ago.
03-28-2009, 12:41 PM   #13
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QuoteOriginally posted by melander Quote
St Bees in lake districs, beginning of the cost to cost walk.
Had a holiday their a couple of years back. If you had used a long telephoto lens you might have got the disused nuclear power station Sellafield in the distance.
03-29-2009, 03:53 AM   #14
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Think the train went past there
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