Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

LPF Donation via Stripe | LPF Donation - Other Methods

Links below open in new window

ArcticMyst Security by Avery

445nM test shots

GBD

GBD

0
Joined
Oct 25, 2010
Messages
783
Points
0
Ive been testing out some different modes on my camera to try to best capture the beam... still needs work, but Im pretty happy with what I got so far.
Pictures taken with a Canon T1i.

Merry Christmas and enjoy! :)
 
Last edited:





jakeGT

jakeGT

0
Joined
Oct 29, 2010
Messages
3,532
Points
0
That's a 445? Looks like blu-ray cause it's soo purple haha
What kind of camera mode is that?
 
E

ElektroFreak

0
Joined
Nov 7, 2008
Messages
5,725
Points
0
445s also appear purple on my Nikon coolpix, but blue on my Casio Exilim.. I guess it depends on the sensor used.
 
david1235102

david1235102

0
Joined
Sep 13, 2010
Messages
443
Points
18
Most cameras have a CCD or a CMOS sensor in them. Does 445 show up differently with the different kinds of sensors? Or does it have to do more with the ISO, white balance, and aperture settings?
 
GBD

GBD

0
Joined
Oct 25, 2010
Messages
783
Points
0
Hey all,

I didnt have time to mess with the white balance settings or much else, but the camera was in "TV" mode, ISO set to auto.
it was shot with a 5 second exposure.

it happens to appear as a purple on my camera.. and I personally wish it did in reality :D

but for now its a deep blue in person.
 
qumefox

qumefox

0
Joined
Mar 26, 2010
Messages
3,220
Points
0
If you want violet, make a 405nm build.. but funny enough, 405nm shows up blue on my camera hehe.
 
aryntha

aryntha

0
Joined
Nov 17, 2009
Messages
2,031
Points
83
I think it has more to do with the filter dyes used in the bayer filter, rather than CMOS vs CCD. Even my Canon 5DmkII likes to make it purple. The only thing that gets 445 right is my Sony 828 with the 4 color RGBE (basically rgb and cyan) sensor.

If this is taken with a Canon T1i, we're talking basically the same bayer configuration probably.

If anyone hasn't seen a 445 yet, it doesn't look purple like this.. its definitely blue.

And yeah i've seen the situation where 405 shows up blue and 445 shows up purple :p
 
enigmahack

enigmahack

0
Joined
Dec 14, 2010
Messages
315
Points
0
*drools*

Just as a side note, I want the Canon 5DmkII like mad... Mostly because of it's mad 1080p video, but my girlfriend is a professional photographer and she's shown me the light. It's a MAD camera :)

</digression>
 
david1235102

david1235102

0
Joined
Sep 13, 2010
Messages
443
Points
18
aryntha said:
I think it has more to do with the filter dyes used in the bayer filter, rather than CMOS vs CCD. Even my Canon 5DmkII likes to make it purple. The only thing that gets 445 right is my Sony 828 with the 4 color RGBE (basically rgb and cyan) sensor.

If this is taken with a Canon T1i, we're talking basically the same bayer configuration probably.

If anyone hasn't seen a 445 yet, it doesn't look purple like this.. its definitely blue.

And yeah i've seen the situation where 405 shows up blue and 445 shows up purple :p
Click to expand...

Does a UV filter over the lense affect how the color looks? I would think it wouldn't really because we can't see UV light.
 
jakeGT

jakeGT

0
Joined
Oct 29, 2010
Messages
3,532
Points
0
My iPhone 4 makes 445 blue and 405 purple
Takes pretty decent 720p pics also of you focus it and have a steady hand!(note my avatar pic of my 1w 445)
And I like to use it because I can upload it straight on my photobucket app and take the img code directly from there to lpf
 
david1235102

david1235102

0
Joined
Sep 13, 2010
Messages
443
Points
18
jakeGT said:
My iPhone 4 makes 445 blue and 405 purple
Takes pretty decent 720p pics also of you focus it and have a steady hand!(note my avatar pic of my 1w 445)
And I like to use it because I can upload it straight on my photobucket app and take the img code directly from there to lpf
Click to expand...

I have the ipod touch 4g and it doesn't have autofocus or anything but the video is ok in daylight but at night isn't very great: it also doesn't record the laser beams very well at night.
 
aryntha

aryntha

0
Joined
Nov 17, 2009
Messages
2,031
Points
83
david1235102 said:
Does a UV filter over the lense affect how the color looks? I would think it wouldn't really because we can't see UV light.
Click to expand...

Well, it may, even if we can't see it... I think what's actually going on is that 445nm is flourescing the red Bayer filter subpixels somewhat, depending on what dye the manufacturer of the sensor uses. (After all, 445 does cause a lot of things to glow..)

It passes through blue, but flouresces red somewhat. (That's my theory at least.) - The mix gives a magenta apperance. On a camera where red doesn't respond that way (or as much) you'll get a more accurate look of what 445 should be.

May not be the case, but just throwing it out there.
 
david1235102

david1235102

0
Joined
Sep 13, 2010
Messages
443
Points
18
aryntha said:
Well, it may, even if we can't see it... I think what's actually going on is that 445nm is flourescing the red Bayer filter subpixels somewhat, depending on what dye the manufacturer of the sensor uses. (After all, 445 does cause a lot of things to glow..)

It passes through blue, but flouresces red somewhat. (That's my theory at least.) - The mix gives a magenta apperance. On a camera where red doesn't respond that way (or as much) you'll get a more accurate look of what 445 should be.

May not be the case, but just throwing it out there.
Click to expand...

If the 445nm fluoresces the subpixels in the filter, then would 405nm light also fluoresce the subpixels?
 
You must log in or register to reply here.




Top