After reading the article John linked to I went to a local thrift
store and scored a Canon SD300 in fine working condition for three
dollars. I then found an article about how to mod the Canon SD400
which appears to be mechanically identical to the SD300. So I ordered
a couple batteries, a charger, and an 8 gig SD card. When the stuff
arrives I will be ready for it with a modded camera. I will at first
use an IR filter made from a floppy disc. If that gives me decent
pictures I will order some filters. One web site I went to explained
how modding the camera to be full spectrum and using filters external
to the camera instead of putting the IR filter in the camera not only
allows taking pictures in narrow wavelengths it also allows taking
pictures using only a couple ranges of wavelengths. This way you can,
for example, take pictures that show blue skies while at the same time
trees and grass appear stark white. When I get some good pictures I'll
post 'em to the Dropbox.
Eric

Trying to see throuygh clothes ?

Joking, but not vompletely. In the 1980s there was a model os Sony camcorder that would do just that with the proper filter. they were forcibly recalled. I worked at a place that sold them and they told me they are SERIOUS about gettong all of them back. I don't know if they brought the cops if you didn't want to give it up or what, but they alluded to that.

If I could go back in time I would buy one with cash money and give a false name.

but I think you are going to find it quite difficult to see through clothes, if you were thinking of that. I do believe just about all cmaeras ar designed to prevent it. Of course the TSA uses it now, but the technology was there back in the 1980s.

Filters were alot of fun with black and white. Color kinda limits what you can do in some ways.

On Tuesday, April 28, 2015 at 4:43:50 PM UTC-7, wrote:
Trying to see throuygh clothes ?

Joking, but not vompletely. In the 1980s there was a model os Sony camcorder that would do just that with the proper filter. they were forcibly recalled. I worked at a place that sold them and they told me they are SERIOUS about gettong all of them back. I don't know if they brought the cops if you didn't want to give it up or what, but they alluded to that.

If I could go back in time I would buy one with cash money and give a false name.

but I think you are going to find it quite difficult to see through clothes, if you were thinking of that. I do believe just about all cmaeras ar designed to prevent it. Of course the TSA uses it now, but the technology was there back in the 1980s.

Filters were alot of fun with black and white. Color kinda limits what you can do in some ways.

The Panasonic video camera that 'sees through clothes' does not need any add-on filter or lens.

User just sets it to 'night shot' mode in the daylight. This removes the IR filter in front of the CCD or whatever it uses.



viola!

Nekkid people videos..

On Tue, 28 Apr 2015 16:43:48 -0700 (PDT), wrote:

Trying to see throuygh clothes ?

Joking, but not vompletely. In the 1980s there was a model os Sony camcorder that would do just that with the proper filter. they were forcibly recalled. I worked at a place that sold them and they told me they are SERIOUS about gettong all of them back. I don't know if they brought the cops if you didn't want to give it up or what, but they alluded to that.

If I could go back in time I would buy one with cash money and give a false name.

but I think you are going to find it quite difficult to see through clothes, if you were thinking of that. I do believe just about all cmaeras ar designed to prevent it. Of course the TSA uses it now, but the technology was there back in the 1980s.

Filters were alot of fun with black and white. Color kinda limits what you can do in some ways.
I remember all the hoopla about that. I had a black and white darkroom
when I was a kid and always wanted color. Now I'm fascinated by this
particular form of B&W.
Eric

On Tue, 28 Apr 2015 14:43:13 -0700, wrote:

After reading the article John linked to I went to a local thrift
store and scored a Canon SD300 in fine working condition for three
dollars. I then found an article about how to mod the Canon SD400
which appears to be mechanically identical to the SD300. So I ordered
a couple batteries, a charger, and an 8 gig SD card. When the stuff
arrives I will be ready for it with a modded camera. I will at first
use an IR filter made from a floppy disc. If that gives me decent
pictures I will order some filters. One web site I went to explained
how modding the camera to be full spectrum and using filters external
to the camera instead of putting the IR filter in the camera not only
allows taking pictures in narrow wavelengths it also allows taking
pictures using only a couple ranges of wavelengths. This way you can,
for example, take pictures that show blue skies while at the same time
trees and grass appear stark white. When I get some good pictures I'll
post 'em to the Dropbox.
Eric
Yesterday I put the camera back together and it works. I think the
autofocus may be off a little. If it is I am not sure what to do about
it. The service manual from Canon tells how to do it using special
charts and software which I do not have. Buy I think I can, with a
little care, mount the camera using the tripod mount and adjust in and
out the the screws that hold the CCD assembly in place. This assembly
is held down by three screws against three springs. So maybe I can
adjust the screws, take a picture, look at the picture on a computer
monitor, and so on until it gets the best focus possible. I aslo need
to find some filter or filters that just pass near UV so that maybe I
can get some good reflected UV pictures of flowers and such. In any
event it looks like the camera is taking pretty good pictures I guess
I need to learn how touse the dropbox,
Eric

On Sun, 3 May 2015, wrote:

On Tue, 28 Apr 2015 14:43:13 -0700, wrote:

After reading the article John linked to I went to a local thrift
store and scored a Canon SD300 in fine working condition for three
dollars. I then found an article about how to mod the Canon SD400
which appears to be mechanically identical to the SD300. So I ordered
a couple batteries, a charger, and an 8 gig SD card. When the stuff
arrives I will be ready for it with a modded camera. I will at first
use an IR filter made from a floppy disc. If that gives me decent
pictures I will order some filters. One web site I went to explained
how modding the camera to be full spectrum and using filters external
to the camera instead of putting the IR filter in the camera not only
allows taking pictures in narrow wavelengths it also allows taking
pictures using only a couple ranges of wavelengths. This way you can,
for example, take pictures that show blue skies while at the same time
trees and grass appear stark white. When I get some good pictures I'll
post 'em to the Dropbox.
Eric
Yesterday I put the camera back together and it works. I think the
autofocus may be off a little. If it is I am not sure what to do about
it. The service manual from Canon tells how to do it using special
charts and software which I do not have. Buy I think I can, with a
little care, mount the camera using the tripod mount and adjust in and
out the the screws that hold the CCD assembly in place. This assembly
is held down by three screws against three springs. So maybe I can
adjust the screws, take a picture, look at the picture on a computer
monitor, and so on until it gets the best focus possible. I aslo need
to find some filter or filters that just pass near UV so that maybe I
can get some good reflected UV pictures of flowers and such. In any
event it looks like the camera is taking pretty good pictures I guess
I need to learn how touse the dropbox,
Eric

Don't you need a filter for non-UV for best operation? Taking out the UV
filter lets the sensor respond to UV, but it also takes in all the rest of
the light. That can't be so good for the results you seek, and surely if
the camera is responding to visible light, that may overwhelm the UV
results, I would think.

I just noticed the Canon S2 that I got two weeks ago for $20 at a garage
sale (it has 12X zoom, though since it's from 2005, it's "only" a 5MP
camera), there's a page about making it respond to UV, and in that case,
there is some bit of filter close to the CCD sensor, or something like
that I wasn't paying attention. That contrasts with someone's earlier
attempt where they found the UV filter was coated onto the lense.

Older digital cameras are now cheap, so this sort of thing can't be costly
to try. If you ruin one camera you got for a few dollars, then bring on
another.

Michael

On 03/05/2015 23:24, wrote:
On Tue, 28 Apr 2015 14:43:13 -0700, wrote:

After reading the article John linked to I went to a local thrift
store and scored a Canon SD300 in fine working condition for three
dollars. I then found an article about how to mod the Canon SD400
which appears to be mechanically identical to the SD300. So I ordered
a couple batteries, a charger, and an 8 gig SD card. When the stuff
arrives I will be ready for it with a modded camera. I will at first
use an IR filter made from a floppy disc. If that gives me decent
pictures I will order some filters. One web site I went to explained
how modding the camera to be full spectrum and using filters external
to the camera instead of putting the IR filter in the camera not only
allows taking pictures in narrow wavelengths it also allows taking
pictures using only a couple ranges of wavelengths. This way you can,
for example, take pictures that show blue skies while at the same time
trees and grass appear stark white. When I get some good pictures I'll
post 'em to the Dropbox.
Eric
Yesterday I put the camera back together and it works. I think the
autofocus may be off a little. If it is I am not sure what to do about
it. The service manual from Canon tells how to do it using special
charts and software which I do not have. Buy I think I can, with a
little care, mount the camera using the tripod mount and adjust in and
out the the screws that hold the CCD assembly in place. This assembly
is held down by three screws against three springs. So maybe I can
adjust the screws, take a picture, look at the picture on a computer
monitor, and so on until it gets the best focus possible. I aslo need
to find some filter or filters that just pass near UV so that maybe I
can get some good reflected UV pictures of flowers and such. In any
event it looks like the camera is taking pretty good pictures I guess
I need to learn how touse the dropbox,
Eric


A very basic webcam I removed the sliver of IR filter from last week,
needed the lens moving 0.3mm away from the CCD to focus the image.
See nearby thread about reading hidden letters

"The service manual from Canon tells how to do it using special
charts and software which I do not have."

Usually that means the backfocus needs adjustment. Yes a very nice pattern is simply wonderful to use, but anytihng with alot of detail will work.

This is a MECAHANICAL adjustment. On a CCD or MOS sensor cam it will be on the lens somewhere towards the back. The older image tube cameras had a clamp you could loosen and move the tube to and fro. The connections all went with it, it was not like dismounting the thing to replace it, which is another whole ball of wax.

Generally, you need to get REALLY sharp focus long, and then bring it in to closeup, zoom in that is. Then without touching the lens focus you adjust it mechanically so it is in focus. Then you zoom out and it will be off. then you refocus it and then zoom back in and set it again.

Lather, rinse and repeat.

But then, you might have a different type of autofocus. there are a few IR types and a couple of ultrasound types. the backfocus thing applies to all of them but newer units may have eliminated the needf ro a backfocus adjust with better menufacturing techniques.

Also, if the unit is ld, some of the older autofocus systems did not really work all that well.

May I suggest watching this youtube video

https://www.youtube.com/watch?v=4wnNFR99xGI

and the others in his series? This guy has done a lot of experimenting with DIY night vision.

On Sun, 3 May 2015 23:57:13 -0700 (PDT), wrote:

"The service manual from Canon tells how to do it using special
charts and software which I do not have."

Usually that means the backfocus needs adjustment. Yes a very nice pattern is simply wonderful to use, but anytihng with alot of detail will work.

This is a MECAHANICAL adjustment. On a CCD or MOS sensor cam it will be on the lens somewhere towards the back. The older image tube cameras had a clamp you could loosen and move the tube to and fro. The connections all went with it, it was not like dismounting the thing to replace it, which is another whole ball of wax.

Generally, you need to get REALLY sharp focus long, and then bring it in to closeup, zoom in that is. Then without touching the lens focus you adjust it mechanically so it is in focus. Then you zoom out and it will be off. then you refocus it and then zoom back in and set it again.

Lather, rinse and repeat.

But then, you might have a different type of autofocus. there are a few IR types and a couple of ultrasound types. the backfocus thing applies to all of them but newer units may have eliminated the needf ro a backfocus adjust with better menufacturing techniques.

Also, if the unit is ld, some of the older autofocus systems did not really work all that well.
Thanks for the advice. If I need to adjust the CCD position I'll try
your method.
Eric

On Mon, 4 May 2015 06:44:56 -0700 (PDT), Tim R
wrote:

May I suggest watching this youtube video

https://www.youtube.com/watch?v=4wnNFR99xGI

and the others in his series? This guy has done a lot of experimenting with DIY night vision.
Thanks Tim, I will look at his videos. This IR stuff has me intrigued.
Eric