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Shutterspeed (2 images)
Hi there, silly question I know. I have the s5 and I have been taking photo' of hummingbirds, so I extend the zoom all the way out and then I hold the shutterdown half way to lock my focus, I am shooting through a window set on P at 400 ISO just for experiment, nowI've heard your shutterspeed should be equal or greater than your zoom, heres the question, how do you know how far out your zoom is, is there a reading on the camera that gives the numbers, I would appreciate any help, I am really learning from the forum..

ThanksBeth.

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Comments (6)

Most lenses hav an indicator showing at what focal length you are at. If you're talking about a P&S camera (Canon S5 P&S or Fuji S5 Pro DSLR?), then it may be hard to tell the focal length. If it is a P&S, you can determine from the camera specs are what the maximum focal length is, and then just assume that in a worse-case scenario..

You will want to switch your camera to an 'S mode', or Shutter Speed mode, which will allow you to set the shutter speed as desired, and the camera will compensate with aperture value settings, and possibly ISO value settings to get the right exposure..

Also, you might want to try a center-weighted or spot metering mode, to help base the exposure on the bird itself, so the background doesn't bias the exposure (the birds look dark on my monitor)..

And of course, you can always try a tripod, monopod, lean the camera on a branch, rail, tree, etc. This also includes just practicing your shooting techniques, like holding the camera steady..

Good luck.

Beth wrote:.

Hi there, silly question I know. I have the s5 and I have beentaking photo' of hummingbirds, so I extend the zoom all the way outand then I hold the shutterdown half way to lock my focus, I amshooting through a window set on P at 400 ISO just for experiment,nowI've heard your shutterspeed should be equal or greater than yourzoom, heres the question, how do you know how far out your zoom is,is there a reading on the camera that gives the numbers, I wouldappreciate any help, I am really learning from the forum..

ThanksBeth.

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Everything I write is a personal opinion. Even when I quote facts, they are the facts I personally choose to accept.http://www.pbase.com/mariog..

Comment #1

A BUNCH OF MAYBES FOLLOW.

When you take a photo, it is probable that there is a way to look at that photo om the back opf the camera, and have superimposed over it the information on the settings used..

But this depends on the camera..

So, take a shot, look at it, perhaps press an "info" or similar button, and maybe the lens focal length will be displayed..

BAK..

Comment #2

Thanks to both of you, I will do that.ThanksBeth..

Comment #3

The rule of thumb for hand-held shutter speed is 1/focal length where focal length is the 35mm equivalent focal length. Assumming the S5 your using is the Canon S5 IS the focal length at max zoom is 432mm equiv. so the shutter speed for hand-held shots of stationary subjects at max zoom would be about 1/400 sec without IS. The Canon has IS so you can use a couple stops slower speed with some degree of reliability, again for stationary subjects..

Since humming birds aren't stationary I'd suggest using a shutter speed around 1/1000 if you have enough light to do so with ISO 400..

I'm not real familure with the display options on the S5 but my Z612 can be set to show shutter speed in any mode and I'm sure the S5 will show speeds in when your in shutter priority mode (to allow setting the shutter speed.)..

Comment #4

This is true. IS is nice to have if you want to avoid camera shake. Since your hummingbird shots could use more light, the longer exposure time would be of benefit. If you want to go the "full distance" with hummingbirds, consider using a strobe on a tripod..

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Comment #5

If lens focal length isn't displayed when you review an image on the camera then have to go by testing different zoom positions..

Assuming you have the Canon S5:.

Actual focal lengthFocal length is 6.0 - 72.0mm.

35mm equivalent focal lengthFocal length is 36 - 432mm.

Conversion multiplier is therefore 6.

Arrived at by dividing the full tele figures: 432mm divided by 72mm = 6or the wide-end figures: 36mm divided by 6mm = 6.

So what you do is look at the exif data* for pics taken at various zoom positions, read off the focal length (assuming it will be in actual values) and multiply by 6 to get the 35mm equivalent focal length and thus what your shutter speed should be for hand-holding..

* Getting exif data in Windows.

1) right-click on the picture2) from the drop-down menu left-click on "Properties"3) in the pop-up next window at the top, left-click on the "Summary" tab.

4) in the next pop-up window, if no info is present then click on the "Advanced" button.

If there is some sort of zoom position indicator or scale or horizontal bar graph in the viewfinder to indicate the zoom position, then you take pics at varying positions:.

Quarter of the way inhalfway or middlethree-quarters of the way across the scaleetc..

And then look at the exif data and figure out the actual focal length at each position..

So for example:.

If I'm zoomed halway out, then I need to use a minimum shutter speed of 1/xxx which for 1/(focal length) 1/200th..

Halfway being (72mm - 6mm) = 66mm.

(66mm / 2) x 6 = 198mm (35mm equivalent focal length).

Good Day,Roonal.

'Money doesn't buy happiness, but it makes for an extravagant depression' by golf tournament sportscaster..

Comment #6

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This question was taken from a support group/message board and re-posted here so others can learn from it.

 

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