As the SX40 limits the ISO to 100 when you are taking a long exposure, the images are often too dark to really capture night time scenery and star scapes.
When we override the ISO a lot more light can enter the image and we can see a lot more stars/scenery than if we were limited to an ISO of 100. In the video I demonstrate using an ISO of 500 and of 800 to show just how much you can expand the light
Some things to remember:
- When you take a 15 second exposure, it takes 15 seconds to process afterwards.
- Use a tripod/stable surface, when you take long exposures your camera is taking in light and detail for the whole 15 seconds and if you move slightly, it will cause a blur.
- Use the 2 second self timer option so that there is time between you pressing the shutter and the image starting. This will eliminate blur caused when you let go of the shutter button
- To focus on night skies it's often easier to maintain focus if you can find a bright star to zoom in on slightly and to keep it in the center of the image, once the focus is locked on that star, the rest of the night sky should be in fairly good focus.
Anywho, any more questions let me know. I will upload examples of the pictures from the video later.
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