Speed cameras


Status
Not open for further replies.

yanyewkay

Senior Member
Sep 22, 2004
3,924
0
0
Cons digger.
#1
I was just wondering how the traffic police actually capture those speeding cars, especially at night.To capture fast objects without flash (those hidden cameras), we need a large aperture in order for a fast shutter speed to see the license plate clearly.

Large aperture especially if they are using a long focal length to capture you far far away will result in a super shallow DOF.

Also the headlights will also be glaring at the lens.. mm. so.. how did they do it? :dunno:

Anyone tried any thing similar?
 

Lensman

New Member
Feb 12, 2002
903
0
0
47
Singapore & Hong Kong
#2
Oh, they do have flash.

Notice that there are always 2 device. One with a 6-square opening and another is a round opening.

I am not sure which is for the flash and the picture. But I have seen it in action at night.

And when triggered it will take 2 photo, the flash is bright green in color. Like a laser show....

the one I saw in Taipei , has a white flash - like the conventional flash light.

Heard that the new generation of speed device uses infra-red flash which is invicible to the eyes....
 

reachme2003

Senior Member
Oct 6, 2003
3,735
0
0
#3
so, if you are beating red lights and saw two simultaneous flashes of light, you can almost be sure that your car has been photographed.
 

adamadam

Senior Member
Feb 9, 2004
3,637
0
0
32
Perth
www.flickr.com
#4
There are the yellow boxes near the traffic lights, and the black ones on the side of the roads. I'll take photographs of them next time :D
 

Sep 12, 2004
183
0
16
#6
AReality said:
Hmmm... :think: if I put my speedlite on optical slave mode, U think it'll work?
I thought I like all cameras. This thread makes me remember that I hate speed cameras... Don't make it work.
 

Status
Not open for further replies.
Top Bottom