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06/02/2007 01:28:16 PM · #1 |
Post your comments, questions, and reviews for...
'Changing the Field of View Using Zoom'
by levyj413
View this tutorial here. |
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06/02/2007 01:35:58 PM · #2 |
| Nice demonstration! And although you don't mention it, you've also demonstrated zoom's effect on DOF. The last image has the background pleasantly blurred from the shallow DOF, whereas the first has a much deeper focus. |
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06/02/2007 01:41:30 PM · #3 |
I'd find the helpful diagram even a bit clearer if you could make the dot representing the subject a different color (maybe a hollow circle), to better set it apart from the nearby black dots representing the camera(s).
This should be especially useful for outdoor portraiture.
Message edited by author 2007-06-02 13:42:09. |
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06/02/2007 01:54:44 PM · #4 |
Originally posted by magnus:
Nice demonstration! And although you don't mention it, you've also demonstrated zoom's effect on DOF. The last image has the background pleasantly blurred from the shallow DOF, whereas the first has a much deeper focus. |
Technically that is not correct, it is only apparent DOF. If you get the same objects from one of the wides angle shots and blow it up to make it the same size as the higher focal length shots you will see that the blur or level of "out-of-focusness" is exactly the same. It is only because the detail is smaller that we think it is more in focus - only the aperture truly affects the DOF. Something to consider - maybe academically more than practically but something to consider nonetheless.
ETA - nice examples and fairly straightforward tutorial.
Message edited by author 2007-06-02 13:56:59. |
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06/02/2007 02:35:12 PM · #5 |
My understanding is that if you make the focused subject the same size in the frame, the DOF is identical regardless of zoom or anything else.
GeneralE: I can change the various items different colors: camera positions, subject, background objects. Thanks!
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06/02/2007 02:50:26 PM · #6 |
L J, You may also want to mention how the objects shown in the focal plane with the object of interest change positions in relation to the whole image as you zoom in or out. A good example is the curved pathway on the right side of the series of images. I see a huge difference in the overall composition between the first and last frame because of that one effect.
You mentioned it talking about the rock, but didn't really make it a solid point.
The vertical component of the zoom is also involved. As you move back and zoom in, you have less and less foreground in the image.
It looks like you are on the way to an excellent and to the point tutorial about a subject that trips up many people who are learning how to compose.
Message edited by author 2007-06-02 14:57:51.
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06/02/2007 05:24:03 PM · #7 |
Originally posted by MelonMusketeer:
L J, You may also want to mention how the objects shown in the focal plane with the object of interest change positions in relation to the whole image as you zoom in or out. A good example is the curved pathway on the right side of the series of images. I see a huge difference in the overall composition between the first and last frame because of that one effect.
You mentioned it talking about the rock, but didn't really make it a solid point. |
I don't understand. I made that point with the rock, the background tree, and the shrub. In fact, I thought that was pretty much the main point of the whole writeup. Yes, the same thing happens with the path, but that's just a fourth example.
I must be missing some distinction between them. Could you try to explain it again?
Thanks!
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06/02/2007 06:56:31 PM · #8 |
Originally posted by MelonMusketeer:
L J, You may also want to mention how the objects shown in the focal plane with the object of interest change positions in relation to the whole image as you zoom in or out. |
Actually they don't.
They change because the shooting position, (ie. distance to subject), changed.
bazz. |
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06/02/2007 07:16:07 PM · #9 |
Interesting! I never thought about this before when I shoot, despite noticing it, but now I'll make sure to take notice!
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06/02/2007 11:41:04 PM · #10 |
Originally posted by sir_bazz:
Originally posted by MelonMusketeer:
L J, You may also want to mention how the objects shown in the focal plane with the object of interest change positions in relation to the whole image as you zoom in or out. |
Actually they don't.
They change because the shooting position, (ie. distance to subject), changed.
bazz. |
Bazz is correct, and nailed what I was trying to put into words about what I was seeing. It tripped me up too.
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03/17/2008 02:12:47 AM · #11 |
Originally posted by Konador:
Interesting! I never thought about this before when I shoot, despite noticing it, but now I'll make sure to take notice! |
Same with me, except... I might not have actually noticed it. :)
Very helpful tutorial :-D |
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