Awesome pic of the volcanic eruption in Iceland.

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Oct 27, 2007
17,010
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OK so why did stars move that far in 2.012 seconds.
Because a long focal length is used, exaggerating the movement of distant objects. Do we need a geometry lesson here? (By the way I would estimate around 5-15 seconds of exposure depending on the focal length, maybe even more).
Why to is the flum not blurring from 2.012 exposer.
Because it's very dark, but the lightening is acting as a flash to freeze motion in the scene.
upper right side by small bolt your left why are those stars streaking vertical.
I don't see any stars or debris in the upper right, just ash.
Still the stars streak yet the flum doesn't perfet pic of flum no blurring that flum is not rising up yet the stars are moving . Ithought stars were stationary and flum was in motion
 

Nemesis 1

Lifer
Dec 30, 2006
11,366
2
0
Because it's very dark, but the lightening is acting as a flash to freeze motion in the scene.
I have to weild on this as I haven't done alot pics with long exposer . So the lighting freezes the motion on everthing in pic but the stars . Ok I will buy that. Only because I haven't taken pics like that but still seems odd to me . Than there is the streaking star that has heavey flum in background. Explain that one.
 

Red Dawn

Elite Member
Jun 4, 2001
57,530
3
0
Because it's very dark, but the lightening is acting as a flash to freeze motion in the scene.
I have to weild on this as I haven't done alot pics with long exposer . So the lighting freezes the motion on everthing in pic but the stars . Ok I will buy that. Only because I haven't taken pics like that but still seems odd to me . Than there is the streaking star that has heavey flum in background. Explain that one.

It's 4 in the morning, do you know where your Meds are?
 

squirrel dog

Diamond Member
Oct 10, 1999
5,564
48
91
Hey,Al Gore,there's your green house gases right there.Man up and send Iceland some of your 'carbon credits',I'm sure they would love you for it.
 

Good4Me

Member
Feb 25, 2000
46
0
66
I vote for photoshop. Can't be the lighting freezing the action on a single exposure because of the additional lighting in the fire/lava on the right. That part would be all blurred. I am think two separate exposures one of for the right and one of the lighting and what it lit up.
 

Kaido

Elite Member & Kitchen Overlord
Feb 14, 2004
48,518
5,340
136
I see your picture and raise you one Mordor:

http://i.imgur.com/U7UY1.jpg

"A bit too close to be honest. I drove about 1 hour passed the police block. I wanted to get as close as possible without getting a heart attack. Goal was a 17-20mm wide angle sunset shot of a mirror in the river which turned out great. But then it just went absolutely crazy. I was not sure if I should escape or continue shooting, but I realized I was probably far too close to get away anyway. However the 2-3km lava that shot up landed on the back side of the volcano. I believe I must have been about 4-7km away from the eruption site.

This is taken with 70-200/2.8IS at about 70mm."
 

ConstipatedVigilante

Diamond Member
Feb 22, 2006
7,671
1
0
Because it's very dark, but the lightening is acting as a flash to freeze motion in the scene.
I have to weild on this as I haven't done alot pics with long exposer . So the lighting freezes the motion on everthing in pic but the stars . Ok I will buy that. Only because I haven't taken pics like that but still seems odd to me . Than there is the streaking star that has heavey flum in background. Explain that one.

What the hell is flum?
 

IronWing

No Lifer
Jul 20, 2001
69,543
27,851
136
If this is God's judgment on Iceland for its banking boo boos, imagine what we're in for!!!
 

SphinxnihpS

Diamond Member
Feb 17, 2005
8,368
25
91
I vote for photoshop. Can't be the lighting freezing the action on a single exposure because of the additional lighting in the fire/lava on the right. That part would be all blurred. I am think two separate exposures one of for the right and one of the lighting and what it lit up.

It's a single long exposure, like several minutes to account for the huge shift in relative star position on the image. Due to the incredibly thick smoke/ash cloud the fire and lava flows in the image are likely invisible without a long exposure, even at night.
 

Red Squirrel

No Lifer
May 24, 2003
67,931
12,383
126
www.anyf.ca
Awesome. So does the volcano actually cause the lightning storm, or is it just coincidence? I would imagine that much ash going in the air would make weird things like that happen.

Wonder how this looks like from space.

As for the stars, I was wondering too why they moved so much without the rest of the pic blurring if it was in fact at a long exposure. That's one thing I miss from my old camera, my current one does not have the option to set exposure. You can take really cool pics in the dark with that setting.
 

Eli

Super Moderator | Elite Member
Oct 9, 1999
50,422
8
81
Interestingly it looks like this picture has a very long exposure but the lightening acted as a flash to freeze that one moment. Look at the sky - there are star streaks. Looks like a fairly long focal length, maybe 400mm, without bothering to do the maths on the star streaks I'd guess that was a ~5-15 second exposure. Neato.

5-15 seconds? No way. Those star streaks are very long, I would say minutes. I have never seen star streaks that long with even a 15 second exposure.

I wonder if the pic is a composite of several exposures or something. The star streaks don't really jive with the composition of the rest of the photo.
 

Nemesis 1

Lifer
Dec 30, 2006
11,366
2
0
Awesome. So does the volcano actually cause the lightning storm, or is it just coincidence? I would imagine that much ash going in the air would make weird things like that happen.

Wonder how this looks like from space.

As for the stars, I was wondering too why they moved so much without the rest of the pic blurring if it was in fact at a long exposure. That's one thing I miss from my old camera, my current one does not have the option to set exposure. You can take really cool pics in the dark with that setting.

Ya I have same problem with cameria But friend is goingt o take pick of stars for me with long exposure so we can see the result. He to says that those streaks won't appear but like me he has never tried that on stars,
 

destrekor

Lifer
Nov 18, 2005
28,799
359
126
5-15 seconds? No way. Those star streaks are very long, I would say minutes. I have never seen star streaks that long with even a 15 second exposure.

I wonder if the pic is a composite of several exposures or something. The star streaks don't really jive with the composition of the rest of the photo.

Well, considering Iceland has a pretty high Latitude, I imagine stars move across the sky faster than they do as you get closer to the equator.

Not really sure.
I noticed the star streaks but never ended up commenting about it. I just like "meh, whatever. Not sure what's going on here, but feel lazy right now."
 

Red Squirrel

No Lifer
May 24, 2003
67,931
12,383
126
www.anyf.ca
Ya I have same problem with cameria But friend is goingt o take pick of stars for me with long exposure so we can see the result. He to says that those streaks won't appear but like me he has never tried that on stars,

They will cause streaks if you leave the exposure long enough. If ever you've sat outside for a few hours around a camp fire looking at the stars they actually do "move" (well it's the earth moving). Next thing you know the big dipper is not even where it was when you first saw it.

A 2-3 hour exposure would make some pretty interesting results I think.
 

ConstipatedVigilante

Diamond Member
Feb 22, 2006
7,671
1
0
Flum =Flume you couldn't reason that out . spelling nazi I suppose your stuck on logs. But flume can and is used in this manner also .

I raise 1 gay= happy to 1 gay = homosexual.

You seemed quite sure of yourself, as you spelled it "flum" about 10 times consistently throughout the thread. Dumbass.
 

RichUK

Lifer
Feb 14, 2005
10,334
677
126
I presume it's common for a lot of lightening activity around an erupting volcano?

Anyway, cool pics :thumbsup:
 
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