Does any camera come with a laser pointer?

In article 2013011718234977633-savageduck1@REMOVESPAMmecom,
Savageduck wrote:

Also the big disadvantage over vehicle installed Radar speed detection
is, the Lidar unit has to be stationary. So watch those overpasses and
hidden pullouts. The CHP will only use Lidar from stationary positions
whereas CHP cruisers use cycling front and rear facing Radar and are
able to clock following and head on closing vehicles. So there are
times when slowing down after you understand that car you coming up to
with the intention of passing is a CHP cruiser and your ticket is as
good as written.

only if you're oblivious.

What is tough for Radar to do is isolate an individual vehicle to
clock. That takes experience and/or LiDAR.

supposedly, they estimate the speed visually and confirm it with radar
(or lidar), so they already know which car it is.

on the other hand, a lot of times they just wait for the overspeed
alarm to go off.

In article , Robert Coe
wrote:

: Also the big disadvantage over vehicle installed Radar speed detection
: is, the Lidar unit has to be stationary. So watch those overpasses and
: hidden pullouts. The CHP will only use Lidar from stationary positions
: whereas CHP cruisers use cycling front and rear facing Radar and are
: able to clock following and head on closing vehicles. So there are
: times when slowing down after you understand that car you coming up to
: with the intention of passing is a CHP cruiser and your ticket is as
: good as written.

Well, if you slow down, it tells the cop that at least you were paying
attention. If he's having a good day, that might possibly tip the balance
between a fine and a warning.

and if you slow down early enough, you won't be pulled over at all.

On Thu, 17 Jan 2013 04:51:02 -0800 (PST), Whisky-dave
wrote:
: On Wednesday, January 16, 2013 11:44:02 PM UTC, Alfred Molon wrote:
: In article , David Dyer-Bennet says...
:
: Well, sure, but...there really aren't any; not something that any
: professional wedding photographer would really recognize as suitable
: professional equipment for his use.
:
: Lots of DSLRs or interchangeable lens cameras with tiltable LCD screens
: around. Why wouldn't a pro use them?
:
: I don't think that was the question, titltable screens first became
: availbe on so called amateur cameras rather than pro DSLRs as far as
: I remember.

My Canon G-5 had one, and I believe it was one of the first. I didn't use the
tilt screen all that much; but when I did, it proved very useful.

Now I've promised that camera to my daughter, for my granddaughter to take to
camp this summer - the theory being that it won't matter much if she
accidentally drops it in the lake. Sic transit gloria mundi.

Bob

On Thu, 17 Jan 2013 19:47:50 +0100, Alfred Molon
wrote:
: In article , David Dyer-Bennet says...
: Lots of DSLRs or interchangeable lens cameras with tiltable LCD screens
: around. Why wouldn't a pro use them?
:
: You won't find that sort of feature above the consumer-level produts; in
: the Nikon line (the one I know) it's not on the D700, D800, or D4 (or
: older models at that level).
:
: Actually lots of DLSRs and interchangeable lens cameras, good enough for
: a "pro", have a tiltable LCD screen.

Real pros aren't too vain to be seen using a lesser camera when the occasion
warrants. I attended a lecture Monday evening by a fairly well known
residential architecture photographer. One of the better pictures he showed
was of a scene he ran across when he wasn't on a shoot and didn't have his
serious equipment along. So he whipped his P&S out of the glove compartment
and banged away.

Bob

Mort wrote:
Peter Jason wrote:
Like laser pinpointing on rifles and pistols.

I need it for shooting from the hip at weddings
and the like when the exposure is set for
pinpoint.

Peter


Do you wish to blind your enemies, or just your friends?

Mort Linder

Just the DJ is allowed to blind.

It would be easy to attenuate laser beams, or make an LED lens natural
light spot beam. Of course, it has to turn off before shot.

Greg

On Thu, 17 Jan 2013 14:08:30 -0500, nospam wrote:
: In article , Alfred
: Molon wrote:
:
: Lots of DSLRs or interchangeable lens cameras with tiltable LCD
: screens around. Why wouldn't a pro use them?
:
: You won't find that sort of feature above the consumer-level produts;
: in the Nikon line (the one I know) it's not on the D700, D800, or D4
: (or older models at that level).
:
: Actually lots of DLSRs and interchangeable lens cameras, good enough
: for a "pro", have a tiltable LCD screen.
:
: those cameras may be good enough in some situations, but pros don't
: generally use those cameras outside of a backup, and if they do, they
: don't use the tiltable lcd anyway.

Damn me, Nospam, how the hell do you know that? How much time do you spend
following pro photographers around to see how they use their backup cameras?
Too much, maybe, if you're not just bluffing.

Bob

On 1/17/2013 11:12 AM, Savageduck wrote:

If you find a 0.1mW laser (note that the Class IIa pointers are usually
1mW)

You won't find a real one, its too low for diodes to be reliable.
But there are ND filters.


it would probably be as useful as the light system found on your
Pacemaker Crown in terms of the illumination it would produce at the
target. however, that is not the point. A subject would still be able to
look directly at the laser source and that is problematic. A 1mW laser
pointer can produce an intensity of 167 times that of the Sun on the
retina. Would 16 times the intensity of the Sun be acceptable to you to
risk?

Indeed it can! BUT ... the beam has to fill the eye's pupil,
let's say 6 mm dia. I'm saying a 24 mm spot, or larger. That's 1/4
the diameter, 1/16th the intensity. Which is by your measure would
make it the same intensity as the sun ... if focused.
But to focus, that eye would have to be focused at essenitally infinity,
not 20 feet.

OF course, one could use a 0.1 milliwatt LED which could never ever be
focused to a diffraction limited spotspot. It would not be any less
dangerous in reality, but would "feel" less dangerous. OR one could
use a holographic diffuser on a laser to make it unfocusable.

I suggest that that sort of intensity is needed only outdoors and
intensity only a bit larger than tungsten is needed indoors.

100 microwatt things are dangerous if stared at, in focus, but not
otherwise.
Admittedly you need 1 microwatt of less to be safe under all
circumstances. You can get more than that with tungsten! Its possible
to go blind staring a long time at 3600K. There a lot of ubntensity
there in the IR.

Doug McDonald

On Thu, 17 Jan 2013 21:47:38 -0500, nospam wrote:
: In article 2013011718234977633-savageduck1@REMOVESPAMmecom,
: Savageduck wrote:
:
: Also the big disadvantage over vehicle installed Radar speed detection
: is, the Lidar unit has to be stationary. So watch those overpasses and
: hidden pullouts. The CHP will only use Lidar from stationary positions
: whereas CHP cruisers use cycling front and rear facing Radar and are
: able to clock following and head on closing vehicles. So there are
: times when slowing down after you understand that car you coming up to
: with the intention of passing is a CHP cruiser and your ticket is as
: good as written.
:
: only if you're oblivious.

Hardly. With modern speed measuring equipment, you have only microseconds to
react. By the time you see (or your detector sees) the device, your goose is
probably cooked.

: What is tough for Radar to do is isolate an individual vehicle to
: clock. That takes experience and/or LiDAR.
:
: supposedly, they estimate the speed visually and confirm it with radar
: (or lidar), so they already know which car it is.
:
: on the other hand, a lot of times they just wait for the overspeed
: alarm to go off.

Very interesting. You are aware, of course, that the Duck is a retired cop?

Bob

On 2013-01-17 18:47:38 -0800, nospam said:

In article 2013011718234977633-savageduck1@REMOVESPAMmecom,
Savageduck wrote:

Also the big disadvantage over vehicle installed Radar speed detection
is, the Lidar unit has to be stationary. So watch those overpasses and
hidden pullouts. The CHP will only use Lidar from stationary positions
whereas CHP cruisers use cycling front and rear facing Radar and are
able to clock following and head on closing vehicles. So there are
times when slowing down after you understand that car you coming up to
with the intention of passing is a CHP cruiser and your ticket is as
good as written.

only if you're oblivious.

Not really. If you are close enough to ID the vehicle in front of you
as a CHP cruiser and react, the officer has already clocked you with
his rear facing radar which cycles every 3 seconds with the forward
facing unit.
Also, there are many beats where you will find more than one CHP
cruiser which is not your typical "Black & White". There are quite a
few all white and some bronze/grey Crown Victoria Interceptor and Dodge
Charger Pursuit vehicles out there without light bars. (However they
still have a subdued door logo.
http://home.comcast.net/~tvigil/52-CHP-SMPV_02.jpg
http://farm6.staticflickr.com/5133/5...45708eee_z.jpg

....and sometimes it isn't a patrol car at all:
http://latimesblogs.latimes.com/.a/6...5871970b-600wi

Naturally California isn't the only State to use such vehicles.

What is tough for Radar to do is isolate an individual vehicle to
clock. That takes experience and/or LiDAR.

supposedly, they estimate the speed visually and confirm it with radar
(or lidar), so they already know which car it is.

It is simple enough to check a vehicle's relative speed against other
traffic to pick it out of a crowd. That is usually the big "tell".
However, some thing a little more presentable in Court is usually
needed.

on the other hand, a lot of times they just wait for the overspeed
alarm to go off.

So you have spent some time in a radar equipped cruiser have you?

I have spent some time in Chevy Caprice cruisers, and Crown Vics.
Though the last Crown Vics I drove were not equipped with traffic
equipment, just radios, door spots, rear shelf lights, and grill lights.


--
Regards,

Savageduck

On 2013-01-17 18:58:27 -0800, Robert Coe said:

On Thu, 17 Jan 2013 04:51:02 -0800 (PST), Whisky-dave
wrote:
: On Wednesday, January 16, 2013 11:44:02 PM UTC, Alfred Molon wrote:
: In article , David Dyer-Bennet says...
:
: Well, sure, but...there really aren't any; not something that any
: professional wedding photographer would really recognize as suitable
: professional equipment for his use.
:
: Lots of DSLRs or interchangeable lens cameras with tiltable LCD screens
: around. Why wouldn't a pro use them?
:
: I don't think that was the question, titltable screens first became
: availbe on so called amateur cameras rather than pro DSLRs as far as
: I remember.

My Canon G-5 had one, and I believe it was one of the first. I didn't use the
tilt screen all that much; but when I did, it proved very useful.

Now I've promised that camera to my daughter, for my granddaughter to take to
camp this summer - the theory being that it won't matter much if she
accidentally drops it in the lake. Sic transit gloria mundi.

Bob

Yup!
My G11 has one and I find myself using more often than I thought I ever would.

--
Regards,

Savageduck