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Zooming while shooting
Today's "How do I...?" question 
as usual, I understand in *theory*, but not in practice. Have found a few articles online, but none of them quite answer my Qs....
I've been footling around with my zoom in my living room (talk about "what not to shoot"!!!), but I can't quite seem to figure it out to create the effect I want - it usually just looks like bad lighting or camera shake rather than the time-tunnel effect I associate with this technique. :rofl:dunno
- what's a good rule of thumb for a shutter speed? (I've experimented with 1-3 seconds-ish, but it still doesn't look quite right to me)
- should zooming take the entire shutter time, or just some of it?
- so far it seems like zooming OUT (from longest reach to widest angle) gives a more marked effect... or am I just doing it wrong?
- does zooming faster or slower give you a more marked effect?
As ever, thanks!
as usual, I understand in *theory*, but not in practice. Have found a few articles online, but none of them quite answer my Qs....I've been footling around with my zoom in my living room (talk about "what not to shoot"!!!), but I can't quite seem to figure it out to create the effect I want - it usually just looks like bad lighting or camera shake rather than the time-tunnel effect I associate with this technique. :rofl:dunno
- what's a good rule of thumb for a shutter speed? (I've experimented with 1-3 seconds-ish, but it still doesn't look quite right to me)
- should zooming take the entire shutter time, or just some of it?
- so far it seems like zooming OUT (from longest reach to widest angle) gives a more marked effect... or am I just doing it wrong?
- does zooming faster or slower give you a more marked effect?
As ever, thanks!
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Hope this didn't confuse you more.
In fact, I only saw these (very helpful) comments after I'd done the shoot, but it's nice to have some of the things I figured out confirmed (ie, stopping in mid zoom - the best ones I got had three distinct points of focus, kind of small/medium/large)
Thanks for the help!
For instance, if you want the effect to occur off-center you can accomplish that much more easily in the digital filter than using a lens based approach.
Likewise, if you notice a region that is not blurring correctly because it has too many elements or the contrast range is too high or, ... whatever, you can attend to those problems before the radial blur and often correct them.
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