Technocrat Thursday: Long Exposures and water

by Kevin Marshall February. 28, 2007 5220 views

Technocrat Thursday (I've moved the day) - Long Exposures and water

Recently, as well as playing studio photographer, I've also been testing some different photography techniques, in particular, long exposure.

What is a long exposure though?

When you press the capture button (or the shutter) you camera lets in the light around it for an amount of time. This can be be as short as 1/2000th of a second (or faster sometimes) to very long exposures that last over minutes and sometimes hours (in the case of Astrophotography)

To aid in setting up a very long exposure, part of the trick as per usual is light. Or in this case, LIMITING the amount of light you use. Late evenings at dusk is normally a good time. Alternatively experiment.

To help the camera along, your lens needs to be set at the maximum aperture (f22 onwards). This will reduce the amount that is being captured, and help with the long exposures.

ISO speed should be set to 100 ISO. This will allow for a very nice image, that doesn't look too pixelated.

How long to set the camera for exposure… its difficult. Again, its that magic trial and error.

Of course a tripod or a very stable surface normally help a lot too.

Here is the EXIF info which will help you see how I did my images.

Subject: “The River” or us locals call it “The Floozie in the Jacuzzi” , Birmingham City Centre,

Image 1: Handheld Shot, ISO100 f2.8, 20mm 1/8 exposure

More luck than not with this shot. Just a handheld reference shot

Image 2: Landscape version - A useful lump of wall holding the camera up. ISO100, f22 10 second exposure

Notice the water has changed. Its a lot more smoother than the first shot. Also the lens is now showing off as it is generating stars out of the lights by itself

Image 3: a different angle - ISO100, f22 8 second exposure

There a lot more action with the water now as you can see by the cascading water. The light reflected in the water is captured with the movement of the water.

Image 4: another angle ISO100, f22 13 second exposure

More detail is captured, as there was less light at this angle.

Like all photos, its a matter of trying and experimenting. So go on… get out and shoot!!!!

(and a minor fess up - I took these on the 20th Feb - I haven't had much time to do processing recently!)

Handheld shot, No delay

Time delay shot 1 - notice the water.

Time delay 2 … the water has a flowing nature to it

Time delay 3 … ditto

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There are 3 comments, add yours!
Kevin Marshall 10 years, 6 months ago

The less said about Molly the better... there's a lot more impolite things to say about her....

That could be an entire photoblog entry... Considering i'm in Dublin's fair city in late April.... Hmmmmmmm ;)

10 years, 6 months ago Edited
Kevin Marshall 10 years, 6 months ago

Admittedly, I'd LOVE to do some more shots like this.

However... the 20mm lens that I used to do this shoot with seems to be be seriously damaged (and I think beyond repair).

The lens is suffering from a fungus growth inside it which is doing odd things to it (rather that the usual things that camera of this class should do)

Basicly $500 worth of lens down the pan. It might be repairable, but unlikely to be honest. We'll see I hope!

10 years, 6 months ago Edited
Christine 10 years, 6 months ago

That second shot is wonderful. I really like the composition of the fourth shot too. Great reminder to experiment with exposures and good info on apertures - something I often forget to adjust.

10 years, 6 months ago Edited