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Today we are at the AHHAA Science Center looking at some interesting stuff.
Here is an interesting exhibition called 'Aha, Keep in Touch!'.
We are disorientated, actually even desperate because we would like to take some photos
but it is so dark in here and almost impossible to get sharp images.
Today we'll try taking sharp images in low light but before we do that I'm gonna try
this bed of nails and take a nap.
Point TV has to go through this room of hands in order to get to the exhibition hall.
Here we are in the exhibition hall. It is really dark in here indeed.
I'm going to take a photo to see whether it comes out sharp or not.
I would say that this is really blurred. What can we do to avoid this?
Number one: we can always raise the ISO sensitivity.
Sensitivity should be raised enough so that the shutter speed becomes short.
I am setting the sensitivity to 6400 for example and taking a photo to check.
Now the shutter speed is short enough to capture sharp images.
The problem with ISO sensitivity is that the higher the setting, the lower the image quality.
An alternative to sensitivity is to use a flash.
I can keep the sensitivity reasonably low and use an external light source which
in this case is the flash. The additional light enables us to use shorter shutter speeds.
As you can see, the image is reasonably sharp and we have frozen the action so to speak.
Flash has its own set of problems. As you can see, the light is not natural.
It is sharp, strong and maybe not suitable for given ambience.
One has to choose between high sensitivity and using the flash based on photographic
intentions and expected results.
If you need to capture still objects then there's one more option to use: the tripod.
The tripod enables to use very long shutter speeds, even 10 minutes or 1 hour.
If the object and the camera are still then there will be no blur.
Our camera is on the tripod and I have selected a still object to capture.
I'm going to take a photo with a shutter speed of 3 seconds.
As you can see, all still objects are sharp and a moving hand is blurred.
This method is good because it enables us to use ambient light which is quite colored.
Flash kills the ambient light and ISO gives us digital noise.
So we have colorful light and a sharp image without noise but like I said:
the tripod only works when your object is still for most of the time.
We took some photos here at the 'Aha, Keep in Touch!' exhibition.
This exhibition will be open until mid-April. Maybe you'll find time to visit this,
to try your senses and take some images in dim light.
I will now go into darkness to check it out.
I didn't understand a thing. Only saw half of the things there.