WorldAirPics.com Forum
Aviation Videos & Photography => Aviation Photography => Topic started by: Vulcan on October 05, 2012, 10:16:01 pm
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Just wondering if anyone could explain what the weird "smoke tail" is around the helcopter. These are two of a few pictures I took yesterday of Rescue 116 (EI-CXS) coming into Galway hospital. The strange trail showed up on about four consecutive pictures but not on any of the others. I didn't notice it when I was taking the pictures. Not seen anything like that before. I understand that the pictures are rubbish and wouldn't post them if it wasn't for the oddity surrounding it.
(http://photos2.pix.ie/E4/76/E47637D5FE1A4C3B83E1156EF9E888FE-0000324460-0003034191-00800L-24BAF01B855F4F0AAB87A6AC6B118858.jpg) (http://pix.ie/vulcan/3034191)
(http://photos3.pix.ie/90/7F/907F570464BC4FB8907466E80A480E7D-0000324460-0003034190-00800L-FDDAFA7458B14F5E912C8C83CBEF4FCB.jpg) (http://pix.ie/vulcan/3034190)
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Looks like a piece of dust or a hair on lens, or in the camera?
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See what you mean, maybe the answer.
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No it's a......Blessed S61.
ok ok I'll get my coat! ;D
Tony K
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Thanks for the replies lads. All makes perfect sense now.
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Yeah looks like its on the lens as its not in focus. If it were on the sensor it would be in focus. Dirt and dust on the sensor show up on photos that have been taken at slower shutter speeds (the blurred rotors) because the depth of field is much greater than those taken at higher shutter speeds .
It's a pain when being all dangerous and hand holding panning shots of aircraft at really slow shutter speeds. Every bit if microscopic dust shows up.
(Ill assume you know what DOF is? Anyhoo, it's the amount of the subject that's sharp in front of and behind the point of focus, just in case!)
:thumbsup: