What the hey...!?!?!?
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Dibble

Original Poster:

13,292 posts

271 months

Thursday 31st May 2007
quotequote all
OK, had a play out on the motorway tonight - having a mess around in aperture priority mode, to do some time lapse/light trail type stuff.

The results weren't great, but it was more for the learning side of things, rather than hoping to achieve a finished article.

But does anyone have any idea what the blue streaks are on this shot?* Is it some sort of lens flare?



  • No police cars were harmed (or even present) during the making of this picure...

GravelBen

16,540 posts

261 months

Thursday 31st May 2007
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UFO?




hehe

omohat

361 posts

261 months

Thursday 31st May 2007
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Blue LEDs?

CY88

2,808 posts

261 months

Thursday 31st May 2007
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Kids with LED trainers running across road?

Mores to the point, how wide was that vehicle whose brakelights are shown in the foreground? yikes

TonyHetherington

32,091 posts

281 months

Thursday 31st May 2007
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Bit of blue sky out-of-the-box thinking for you...

...is it scratches in the road from a previous crash that the overhead street lights (which contain a blue tinge from their bulb) are reflecting at just an appropriate angle in the scratches into the camera?

That's all I could come up with frown

Interesting, though!

sidaorb

5,595 posts

237 months

Thursday 31st May 2007
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I'm with CY, got real concerns about the wide load!

You sure you weren't just on photoshop after a few sherbets? smile

nick_bbb

5,514 posts

266 months

Thursday 31st May 2007
quotequote all
It is flare I recon smile

BTW you should have been in Shutter Priority not Aperture Priroty wink

Dibble

Original Poster:

13,292 posts

271 months

Thursday 31st May 2007
quotequote all
nick_bbb said:
BTW you should have been in Shutter Priority not Aperture Priroty wink
Why? Aren't the shutter speed/aperture "symbiotic" as it were? One goes up, the other goes down, sort of thing?

Although thinking about it, I did alter the aprture to increase/decrease the shutter time, so going about it "Arse about face" I suppose.

Mixed results, and as I said, learning.

Still no idea about the blue flares, not kids, scratches or anything like that. I also had the lens hood on, so would have hoped that would deal with any flare? Can't see it in any of the other shots.

miniman

30,192 posts

293 months

Thursday 31st May 2007
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Wild stab in the dark: reflections from the blue reflective tip of the 1/4 mile marker just to the left?

VxDuncan

2,850 posts

265 months

Thursday 31st May 2007
quotequote all
There's all sorts of wierd stuff going on there!, strange smoke, lights, wide loads...

I looks like quite a short exposure - around a second or less. If it's fairly dark I'd be adjusting the apperture so that I could get 20+ sec images (dependant on traffic density) so maybe 100ISO F8 and bulb for different lengths of time. Depends on the light levels obviously, but remember the difference between 10sec and 40secs is only two stops...


My theory is that if it was fired by remote (in front of the camera) it picked up your watch. Else if it was a DSLR, it could be stray light through the eyepiece - hence why Nikon give you a natty cover to stick over the EP for long exposures.

Dibble

Original Poster:

13,292 posts

271 months

Thursday 31st May 2007
quotequote all
VxDuncan said:
There's all sorts of wierd stuff going on there!, strange smoke, lights, wide loads...
Tell me about it...

VxDuncan said:
I looks like quite a short exposure - around a second or less. If it's fairly dark I'd be adjusting the apperture so that I could get 20+ sec images (dependant on traffic density) so maybe 100ISO F8 and bulb for different lengths of time. Depends on the light levels obviously, but remember the difference between 10sec and 40secs is only two stops...
Was definitely longer than a second.


VxDuncan said:
My theory is that if it was fired by remote (in front of the camera) it picked up your watch. Else if it was a DSLR, it could be stray light through the eyepiece - hence why Nikon give you a natty cover to stick over the EP for long exposures.
It was fired by remote, but I wasn't wearing a watch. And I stuck the cap on over the viewfinder after I'd framed (using Nikon D50).

speedychrissie

2,994 posts

270 months

Thursday 31st May 2007
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they really are strange phenomenon.

the exif says it was 3seconds. but i agree with the other poster that a longer exposure would be nicer.

i keep on meaning to experiment myself though.

Andy M

3,755 posts

290 months

Thursday 31st May 2007
quotequote all
Try: shoot RAW, ISO 100 (or 200 if you're a Nikon user), shutter priority @ 30 secs, exposure compensation + 1 stop.

Then, have a mess with the white balance when you get the shot on your computer.

m3evo2

2,064 posts

239 months

Thursday 31st May 2007
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Had a bash at this myself recently, the wonder of digital, if it's crap delete it and try again.


hugh_

3,749 posts

272 months

Thursday 31st May 2007
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CY88 said:
Mores to the point, how wide was that vehicle whose brakelights are shown in the foreground? yikes
Lights at the top of a lorry (you can see it if you look carefully), the perspective causing it to appear wide.

sidaorb

5,595 posts

237 months

Thursday 31st May 2007
quotequote all
Hugh,

Now you've made me look closer, think your right, appears to be ghosting of a vehicle too with the wide lights, similarly with the truck by the bridge which is even clearer

Dibble

Original Poster:

13,292 posts

271 months

Thursday 31st May 2007
quotequote all
A few more (I'm going to try unlit motorway next, and get rid of the distracting streetlamps):








GetCarter

31,313 posts

310 months

Thursday 31st May 2007
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Andy M said:
Try: shoot RAW, ISO 100 (or 200 if you're a Nikon user)
OI!

I usually use 100 ISO! tongue out

Edited by GetCarter on Thursday 31st May 23:25

Ledaig

1,810 posts

293 months

Thursday 31st May 2007
quotequote all
Ref the blue streaks, were you shooting through a vehicle window at the time (reflections in the glass)?

Dibble

Original Poster:

13,292 posts

271 months

Thursday 31st May 2007
quotequote all
Right on the bridge edge (behind the barrier), on a tripod, remote shutter, lens hood, eyepiece cap on after framing.

Nikon D50, some on the 18-55 lens, some on the 55-200. All were "auto"(ish) for white balance (whatever THAT is... wink ), just messed around with the aperture, let the camera do the rest.

Like I say, still learning, but pleased I went and had a go (it's actually quite difficult to find a decent bridge with a decent view...).