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Mammatus From Frontal Clearance

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Author Topic: Mammatus From Frontal Clearance  (Read 454 times)
martinastro
Martin Mc Kenna
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« on: October 08, 2008, 12:01:34 am »

Thanks very much Paul. I might just send in one or two of those. Pity I messed up the shutter speed - but lesson learned - next time use a tripod and appropriate shutter.

Paul, any idea why the images are so grainy?. These are all ISO100 yet they look noisy and poor. I have noticed this trend for some time but ONLY when near dusk when the light level is low. At this time I seem to get this result and I have problem trying to get a focus. Yet during daytime I have no problems. My camera has a manual focus ring on the barel like a DSLR but it's not a truemanual, the manual movement triggers a digital focus which gives a slight delay before I see the result on the LCD screen. I wonder why it's so tempermental in low light. I find I can get focus accurately and rapidly with the aperture closed down but with a wide open shutter the focus is so fine line that it can be frustrating. I suppose practice makes perfect.

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