Bracket Sequencing help - DPChallenge Forums

Tamron SP AF 28-75mm f/2.8 XR Di for Canon

05/20/2007 07:13:59 PM · #1

I have never done any bracket sequencing but would like to start to have a play with HDR. I understand the concept of bracket sequencing (basic understanding) but am not sure how to apply it in my camera. I know where to set it but am not sure once I am in that area of my camera of what a good starting point is.

Could someone who has done this in a Canon give me a few starting tips and then I will take it from there.

SamDoe1

Canon EOS-350D Rebel XT

05/20/2007 09:41:04 PM · #2

Well here's what I generally do. If the scene does not have *that* much dynamic range, +/-2EV should do it and your 30D should be able to bracket that much. So the shots will be -2 step, 0 step, +2 step. If the range is pretty high, I try for +/-4EV. To do this, dial your camera's exposure compensation to -2EV and again set it to bracket the shots from +/-2EV. So this time you'll get -4, -2, and 0. Once you do that, dial up the exposure compensation to +2EV and do the same +/-2EV bracketing again. This will give you 0, +2, +4. You will have to delete (or omit) the duplicate 0EV shot from the HDR image processing in this case, but that's no big deal.

Hope this helps!

Message edited by author 2007-05-20 21:41:45.

05/20/2007 09:47:59 PM · #3

Thanks so much. Will see if I can successfully apply this to my camera and see how I go.

Canon EF 17-40mm f/4.0L USM

10/06/2007 11:29:18 PM · #4

OK, now I need more specific help. Could a 30D owner give me step by step instructions on how to achieve this. I know the theory behind the sequencing but even after reading the manual (it dedicates 1/2 small page to it) I still have no idea what I am supposed to be doing in my camera. Hypothetically it want to take a photo today of a landscape. It is quite sunny. I will then go outside and try it myself.
Thanks for help in advance.

david_c

Canon EOS-7D

10/06/2007 11:49:20 PM · #5

Just shoot in RAW format, and save out 3 (or more) JPEGs with stepped exposure values.

Judi's excellent tutorial on how she created this image is well worth watching.

Message edited by author 2007-10-06 23:49:43.

Samsung Galaxy S24, S24+, S24 Ultra

10/06/2007 11:53:24 PM · #6

Originally posted by david_c:

Just shoot in RAW format, and save out 3 (or more) JPEGs with stepped exposure values. Judi's excellent tutorial on how she created this image is well worth watching.

I tried this but didn't have much success. That is why I wanted to try it with the camera. Still intersted in the steps to set up the camera if someone is willing to help. Will watch the tutorial. Thanks

Bear_Music

Sony 24-70mm f/4 Vario-Tessar T* FE OSS

10/06/2007 11:58:57 PM · #7

You don't have to use the bracket function. I never do, 'cuz I always forget to reset it. Just set camera at Av (aperture priority), pick your aperture, then use the EV compensation to dial in the overs and unders. BTW, they should be at most 1 stop apart; if you need a +2 and a -2, then you want 5 exposures: -2, -1, 0, +1, +2. Most landscape work is serviceable at 3 exposures though, +1, 0, -1. The problem with +2, 0, -2 is that it leaves too big of an information gap in the mid-tones.

People who are serious about HDRI sometimes use like 9-12 exposures and change each by a half or quarter stop, seeking the utmost subtlety in the mid-tones.

R.

ETA: or use camera on full manual and just change shutter speeds with the dial to cover the necessary range.

Message edited by author 2007-10-07 00:00:00.