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Photo Forum / Digital Photography / DSLR Cameras / August 2006Exposure bracketing (D70)
The D70 gives a range of exposure bracketing from -2EV to +2EV with numerous increments in between. Assuming that I want "one under, one over, and one right on" what determines whether I go in steps of 1/3, 1/2, or a full EV? Are there any guidelines for choosing? What do most people use? Gordon > The D70 gives a range of exposure bracketing from -2EV to +2EV with numerous > increments in between. > Assuming that I want "one under, one over, and one right on" what determines > whether I go in steps of 1/3, 1/2, or a full EV? > Are there any guidelines for choosing? > Gordon I would say the contrast range of the scene and what you are trying to achieve in the image eg if you can't capture the entire dynamic range you have to decide which bits you want to be correctly exposed and which bits not. >The D70 gives a range of exposure bracketing from -2EV to +2EV with numerous >increments in between. > >Assuming that I want "one under, one over, and one right on" what determines >whether I go in steps of 1/3, 1/2, or a full EV? The brightness and dynamic range of the scene. >Are there any guidelines for choosing? Yes. A 1/3 stop is a noticeable boost or cut in brightness level, but not a dramatic change. >What do most people use? I don't really know since I still haven't talked to everyone...it's a lot of people you know. :-) But I think the general consensus is that 1/3 is the common value used to bracket a typical shot. >The D70 gives a range of exposure bracketing from -2EV to +2EV with numerous >increments in between. > >Assuming that I want "one under, one over, and one right on" what determines >whether I go in steps of 1/3, 1/2, or a full EV? > ... am I correct in my understanding that the f-stop & shutter speed are set, so exposure bracketing happens between the sensor and the saved file..therfore I have exactly the same result (and much more) if I shoot RAW and then adjust exposure comp on the RAW file...eg via Raw Shooter? - thanks - >... am I correct in my understanding that the f-stop & shutter speed are >set, so exposure bracketing happens between the sensor and the saved >file..therfore I have exactly the same result (and much more) if I shoot >RAW and then adjust exposure comp on the RAW file...eg via Raw Shooter? > - thanks - Not necessarily - bracketing will change the exposure of the shot if you pick exposure or flash bracketing, and you will need to take 2 or 3 pictures to complete the series. These 2 or 3 pictures will have different settings and different levels of dark and light and maybe burned white or black pixel areas. If you pick white balance, the camera takes only one picture but creates 2 or 3 versions with different WB. This only works in JPG. RAW doesn't have WB. If you shoot RAW - don't worry about WB bracketing! Iceberg Concept, Inc. skrev: > The D70 gives a range of exposure bracketing from -2EV to +2EV with numerous > increments in between. > Assuming that I want "one under, one over, and one right on" what determines > whether I go in steps of 1/3, 1/2, or a full EV? > Are there any guidelines for choosing? > What do most people use? I don't know. I can only tell you what I use. I almost never bother with bracketing by 1/3 of a stop, except possibly as a learning excercise. If I shoot RAW, I almost always will have that kind of leeway within one exposure, and also with JPEG:s, I normaly prefer an exposure compensation of -1/3, to be corrected if needed with "levels" in Photoshop, to fiddling with bracketing, if I'm afraid of blowing highlights. Thus, I never bracket for fine-tuning. I only bracket when I don't really have a clue. The smallest bracketing interval I would use is 2/3 of a stop. That or a full stop is probably what I use the most. Jan Böhme > Assuming that I want "one under, one over, and one right on" what determines > whether I go in steps of 1/3, 1/2, or a full EV? If I'm in a hurry and I can see the scene has a lot of highlights and shadows that might fool the auto-exposure I'll usually go + and - 0.7. Sometimes I just can't be bothered to try to get it right first time and I'd rather take loads and chuck the rubbish away later. Iceberg Concept, Inc. skrev: > The D70 gives a range of exposure bracketing from -2EV to +2EV with numerous > increments in between. [quoted text clipped - 3 lines] > > Are there any guidelines for choosing? Bracketing, in my opinion, is mostly called for in high contrast scenes (bright sun and shadows) and even -1,0,+1 isnt always enough. Lately I did a little testing of the useability of Photoshops HDR function and -1EV and -2, 0, +2 for bracketing was fine when the goal was a blending of 3 exposures. The result of my first test of HDR ever: http://www.olelarsen.eu/HDRTest/0001hdr.jpg  SignatureMed venlig hilsen, Ole Larsen. New Images And Design, aug. 2006 http://Olelarsen.eu/ http://home.tiscali.dk/muggler |
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