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Old 09-22-2010, 08:35 PM #49
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Default Re: More Purple Than Blue

You'd think so wouldn't you


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Old 09-22-2010, 11:29 PM #50
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Default Re: More Purple Than Blue

I have found that it depends on where I am shining my 445, sometimes it is more voilet than blue. We have had some fires lately and shining my laser at the moutains it looks violet with blue sparkles due to the smoke and paricles in the air!
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Old 09-23-2010, 02:57 AM #51
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Default Re: More Purple Than Blue

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Originally Posted by 00Giorge View Post
I have found that it depends on where I am shining my 445, sometimes it is more voilet than blue. We have had some fires lately and shining my laser at the moutains it looks violet with blue sparkles due to the smoke and paricles in the air!
Sounds beautiful. Unfortunately I wont be in the mountains for another 10 months.
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Old 09-23-2010, 02:48 PM #52
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Default Re: More Purple Than Blue

Yeah I have seen some videos when it looks blue and some when it looks purple.
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Old 09-23-2010, 04:36 PM #53
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Default Re: More Purple Than Blue

What camera's make of it differs too. I have one that for some reason captures red (650-660 nm) lasers magenta. Its color performance is fine on normal scenes though, those things just arent built for a whole lot of monochromatic light...
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Old 09-23-2010, 04:37 PM #54
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Default Re: More Purple Than Blue

Videos are irrelevant .. color there depends on camera interpretation .. and blues are common problem .. it's almost impossible to capture blues and violets correctly.
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Old 09-23-2010, 05:09 PM #55
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Default Re: More Purple Than Blue

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Originally Posted by DrSid View Post
Videos are irrelevant .. color there depends on camera interpretation .. and blues are common problem .. it's almost impossible to capture blues and violets correctly.
Thanks you for this. I was wondering why some looked so different.
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Old 09-23-2010, 06:20 PM #56
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Default Re: More Purple Than Blue

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Originally Posted by Tech_Junkie View Post
Sounds beautiful. Unfortunately I wont be in the mountains for another 10 months.
I wish my camera would have been here to take a pic, my daughter borrowed it. I tried with my phone but they didn't turn out.

I live in the mountains, my elevation is 4900ft. It is actually legal to ride our quads on the streets, I don't have to load up my quad to go riding I am here, get on it and go.
This is from my front door
More Purple Than Blue-front-door.jpg
my quad. 800 polaris
More Purple Than Blue-4x.jpgMore Purple Than Blue-4x2.jpg

I took these pics with my phone!
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Old 09-23-2010, 11:20 PM #57
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Default Re: More Purple Than Blue

Well to me, the beam IS blue. It is a certain sort of deep, techni-color blue. Very beautiful. There is very little violet in there. The only reason you can see the violet is it shows better at higher powers in ambient atmospheric dust. Put your 445nm in a little smoke or fox, and all you will see it pure blue.
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Old 09-28-2010, 08:42 AM #58
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Default Re: More Purple Than Blue

is this blue ? or violet ( my first pic of my 445 ) and it's true blue to me



ps: i posted a few pics in multimedia ( first pics )

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Old 09-28-2010, 10:54 AM #59
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Default Re: More Purple Than Blue

For me 445nm is royal blue. I think this is the perfect name of the color what is not purple and neither classic blue.
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Old 09-28-2010, 01:01 PM #60
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Default Re: More Purple Than Blue

I propose that the word "purple" be banned from LPF unless it is being used to discuss rock music from the 1970s.
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Old 09-28-2010, 02:06 PM #61
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Default Re: More Purple Than Blue

Most sites about color theory actually use word 'violet' for fast single line blues. 'Purple' is then reserved for red-blue combinations.
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Old 09-28-2010, 05:15 PM #62
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Default Re: More Purple Than Blue

All saying cameras can't capture it well.

Strangely enough mine captures it EXACTLY like my eyes. Even has the same problem of not really being able to focus on it. When the whole room is bathed in 445 light, my camera takes blurry photos. It doesn't care to focus on the beam either. Ive been fighting with that a lot.
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Old 09-28-2010, 05:26 PM #63
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Default Re: More Purple Than Blue

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All saying cameras can't capture it well.

Strangely enough mine captures it EXACTLY like my eyes. Even has the same problem of not really being able to focus on it. When the whole room is bathed in 445 light, my camera takes blurry photos. It doesn't care to focus on the beam either. Ive been fighting with that a lot.
What camera is it then ?
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Old 09-28-2010, 06:21 PM #64
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Default Re: More Purple Than Blue

It all depends on white balance which your camera calibrates upon exposure. Most probably use auto white balance, if the option is even available. It's easily correctable in any photo editing program.

Taking RAW pictures enables you to do this tuning with the raw pixels captured by your sensor.

Here's a shot made by my Nikon D90 which I find reflects my perception of 445nm well. It is set to auto white balance and manual shutter/iso/aperture. No post-editing except for resizing.

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