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Mimic Octopus, Thaumoctopus mimicus, Sascha Janson, Critters@Lembeh Lembeh Resort, Lembeh Strait Indonesia 2016
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Hairy Frogfish, Antennarius striatus, Sascha Janson, Critters@Lembeh Lembeh Resort, Lembeh Strait Indonesia 2016
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Harlequin Shrimp, Hymenocera elegans, Sascha Janson, Critters@Lembeh Lembeh Resort, Lembeh Strait Indonesia 2016
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Rhinopias, Rhinopias frondosa, Sascha Janson, Critters@Lembeh Lembeh Resort, Lembeh Strait Indonesia 2016
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Coconut Octopus, Amphioctopus marginatus,Sascha Janson, Critters@Lembeh Lembeh Resort, Lembeh Strait Indonesia 2016

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Tuesday Tips & Techniques from Photo Pro Sascha Janson #14


February 17, 2015

On select Tuesdays, Cameras@Lembeh (the first and only Photo & Video Center in Lembeh Strait) will feature Tips and Techniques by Photo Pro Sascha Janson. Sascha will offer up a range of information, you never know what piece of wisdom he will impart.

Sascha says: Use the lowest ISO number possible!

I often get to see people’s images on their cameras and I’m always curious to know what setting was used. Sometimes I find out that the ISO setting is at a very high number. On the cameras’ screen, the image still looks nice, but on a larger monitor (or if we zoom in on the camera) we’re able to see noise in the image when the ISO number is too high (especially in the darker areas of the image where the noise appears first). To avoid the grainy look, use a lower ISO number (if possible).

What is ISO?

ISO refers to the light sensitivity of your camera’s sensor. The lowest number like 80, 100 or 160 (depending on camera model) produces the best quality image, because the noise is kept to a minimum. Using a high number such as 1600 ISO introduces digital noise to the image and we will get a grainy looking image. High-end Pro DSLRs are almost noise free even at very high ISO numbers, but for compact cameras it is very important to use a low ISO number to keep the image clean of noise.

So why would I change it then?

In low light situations we sometimes end up dialing in our settings for aperture, but because it is too dark we would have to use a shutter speed so slow that it would be impossible to hold the camera in our hand(s). This is when we use a higher ISO number to make the camera’s sensor more light sensitive. There is no real need to do that for macro photography, because our strobes are powerful enough to light up the subjects, but for shooting wide-angle sometimes there’s not enough light (e.g. shooting in caves, shooting with ambient light or shooting at sunset), and we might have to set a higher ISO number.

ISO80
Fimo mantis shrimp with eggs courtesy of Dimpy Jacobs – Image taken with Canon PowerShot S95 – ISO 80

ISO3200
Image taken with Canon PowerShot S95 – ISO 3200

 

Looking on the LCD screen on the camera it’s almost impossible to see the difference, but once you look at them on a larger screen, you’ll be able to see the noise. To see the massive difference, click on the two images above.

To get the best possible result, keep your camera’s ISO number as low as possible!

 

Stay tuned for more Tuesday Tips & Techniques