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Old 10-22-2011, 06:23 PM #1
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Default Can't take good beamshots ! pls help !!!

I have a Sony Cybershot T-90 and i am trying to take some beamshots.
But...
They have a black thing around the beam. I have a tripod and the ISO is set to Auto.

Here's a example of the beamshots:

With ligths on:

Sorry about the clothes
With lights off:


How can i fix it ?


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Last edited by jimdt7; 10-22-2011 at 06:24 PM.
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Old 10-22-2011, 06:53 PM #2
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Default Re: Can't take good beamshots ! pls help !!!

The problem lies in oversaturation of the CCD.
Most cameras now can adjust exposure levels across the image (using software methods on the digital data) and in your case the boundry between the extremely bright area and the surrounding area is being handled as the less bright area causing the over exposure that still more software is identifying and turning it black. (Otherwise it would be a bright white glare. Back in the old days of tube based video cameras that was a common problem.)
There are a few different things you could try to better match the light levels between the different areas and the best way is for you to play with your camera a bit more. Read the manual that comes with it and try to decide which situation applies the best for your picture.
-> The "AUTO" setting is usually for the general masses who can't figure out how to use a camera. It covers most picture taking situations but doesn't do any of them well. That's why you have other settings available.
I would suggest a setting for bright light conditions. That would allow for a good picture of the brightest spot while it would make the area around appear much darker.
If you are trying to get a good beam shot then don't include the end bright spot in your picture, set for a low light level, turn off the lights, and add a bit of mist of some sort to highlight the beam. A longer exposure will make for a good shot and you could have some fun with movements in the picture too.

That's my take on it.
Probably not remembring a bunch of stuff though.
Someone else might add more...

Oh. BTW. Don't ever apologize for your life showing in the pictures. Everyone has one. Most would only care about the topic of interest anyways. Have you seen some of the other pictures posted ? With time you will get better at taking pictures of what you want. Besides, there's always photo manipulation software.
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Old 10-22-2011, 07:13 PM #3
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Default Re: Can't take good beamshots ! pls help !!!

Quote:
Originally Posted by ShortyInCanada View Post
The problem lies in oversaturation of the CCD.
Most cameras now can adjust exposure levels across the image (using software methods on the digital data) and in your case the boundry between the extremely bright area and the surrounding area is being handled as the less bright area causing the over exposure that still more software is identifying and turning it black. (Otherwise it would be a bright white glare. Back in the old days of tube based video cameras that was a common problem.)
There are a few different things you could try to better match the light levels between the different areas and the best way is for you to play with your camera a bit more. Read the manual that comes with it and try to decide which situation applies the best for your picture.
-> The "AUTO" setting is usually for the general masses who can't figure out how to use a camera. It covers most picture taking situations but doesn't do any of them well. That's why you have other settings available.
I would suggest a setting for bright light conditions. That would allow for a good picture of the brightest spot while it would make the area around appear much darker.
If you are trying to get a good beam shot then don't include the end bright spot in your picture, set for a low light level, turn off the lights, and add a bit of mist of some sort to highlight the beam. A longer exposure will make for a good shot and you could have some fun with movements in the picture too.

That's my take on it.
Probably not remembring a bunch of stuff though.
Someone else might add more...

Oh. BTW. Don't ever apologize for your life showing in the pictures. Everyone has one. Most would only care about the topic of interest anyways. Have you seen some of the other pictures posted ? With time you will get better at taking pictures of what you want. Besides, there's always photo manipulation software.
Thanks a lot very well explained ! Will try some settigns now and I will update the OP tomorrow ! (Here is 10:30pm)
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800mW WL Spyder Arctic G2
Greens
O-like Green Crown 500mW Peak 731mW Chart here
PL520 100mW
Cheap e-bay 25mW and 100mW

Reds
O-like cute 300mW (Dead)

LPMs
Modded Laserbee 2.5W USB

Last edited by jimdt7; 10-22-2011 at 07:39 PM.
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Old 10-23-2011, 06:56 PM #4
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Default Re: Can't take good beamshots ! pls help !!!

don't include the laser dot in the image and just increase the shutter time, but blue is quite hard to get a good exposure
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Old 10-23-2011, 07:09 PM #5
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Default Re: Can't take good beamshots ! pls help !!!

You could try trowing some filters in front of the lens to lower the light getting into the CCD as well....
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Old 10-23-2011, 07:15 PM #6
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Default Re: Can't take good beamshots ! pls help !!!

also change your angle the closer you are to looking into the beam the brighter the beam will be
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