| Author | Thread |
|
|
11/06/2006 05:37:13 AM · #1 |
| I have used Exposure Bracketting. But my camera has a feature that I have never used. What is Focus-Bracketting? How is it used?? |
|
|
|
11/06/2006 06:30:55 AM · #2 |
Originally posted by kbhatia1967:
I have used Exposure Bracketting. But my camera has a feature that I have never used. What is Focus-Bracketting? How is it used?? |
Changes focal point. Allows you to increase DOF. Useful for macro.
|
|
|
|
11/06/2006 11:25:29 PM · #3 |
Originally posted by virtuamike:
Originally posted by kbhatia1967:
I have used Exposure Bracketting. But my camera has a feature that I have never used. What is Focus-Bracketting? How is it used?? |
Changes focal point. Allows you to increase DOF. Useful for macro. |
Does it change focal point? or increases DOF? or Both??
By what extent??? |
|
|
|
11/07/2006 12:21:17 AM · #4 |
I don't think it affects DOF at all -- I believe it's only used with the camera's auto-focus feature, by taking three (or maybe more) exposures, one where it thinks the correct focus should be, one focused in front of that point, and one just behind it.
This would probably be most useful for handheld macros, where moving the camera just slightly after the auto-focus is set can make the subject go out of focus. |
|
|
|
11/07/2006 12:24:14 AM · #5 |
| It's for use with manual focus. It is useful with macro shots where the DOF is pretty shallow. My Canon G3 has the same feature. The bracketing adjusts the focus point slightly for each shot. |
|
|
|
11/07/2006 12:51:34 AM · #6 |
Originally posted by cpanaioti:
It's for use with manual focus. It is useful with macro shots where the DOF is pretty shallow. My Canon G3 has the same feature. The bracketing adjusts the focus point slightly for each shot. |
I think it only works in autofocus, at least on a dSLR; when you switch to MF that's on the lens itself, and it turns off the motor, so focus bracketing can't work there. But in fact it's very useful for autofocus macros, when you can't be quite sure the autofocus point is precisely where you need it to be. Focus bracketing racks the lens in and out for several different exposures, increasing your chance to get the right focal point.
R. |
|
|
|
11/07/2006 01:21:18 AM · #7 |
| so why is focus bracketing different from focus lock? |
|
|
|
11/07/2006 01:36:39 AM · #8 |
Originally posted by crayon:
so why is focus bracketing different from focus lock? |
It changes the focal point between shots, so that (hopefully) one of them is in-focus. Same as with exposure-bracketing, where the camera calculates what it thinks is the best exposure, and then also takes one with less and one with more exposure, so that one of them might come out "right."
Focus lock will set the focal point and not change it, even if the camera or subject moves from their original position. |
|
|
|
11/07/2006 01:48:02 AM · #9 |
Originally posted by GeneralE:
Originally posted by crayon:
so why is focus bracketing different from focus lock? |
It changes the focal point between shots, so that (hopefully) one of them is in-focus. Same as with exposure-bracketing |
Got it clear this time, thank you General! |
|
|
|
11/07/2006 10:11:47 AM · #10 |
Originally posted by Bear_Music:
Originally posted by cpanaioti:
It's for use with manual focus. It is useful with macro shots where the DOF is pretty shallow. My Canon G3 has the same feature. The bracketing adjusts the focus point slightly for each shot. |
I think it only works in autofocus, at least on a dSLR; when you switch to MF that's on the lens itself, and it turns off the motor, so focus bracketing can't work there. But in fact it's very useful for autofocus macros, when you can't be quite sure the autofocus point is precisely where you need it to be. Focus bracketing racks the lens in and out for several different exposures, increasing your chance to get the right focal point.
R. |
On the P & S it's only in manual focus. On a DSLR it doesn't make sense in manual focus. |
|
Home -
Challenges -
Community -
League -
Photos -
Cameras -
Lenses -
Learn -
Help -
Terms of Use -
Privacy -
Top ^
DPChallenge, and website content and design, Copyright © 2001-2025 Challenging Technologies, LLC.
All digital photo copyrights belong to the photographers and may not be used without permission.
Current Server Time: 09/01/2025 03:03:19 AM EDT.
