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Correct name for "pinhole lens" used in covert cameras?

 
 
Alison J
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      06-13-2009
Can I ask you specialists some questions about digital cameras.

I want some info on the optical quality of the lenses used in small
digital camera units lie this: http://tr.im/onwK.

Many sites call that a "pinhole lens" but when I search for
"pinhole lens" I get hits for lenses created by making a pinhole in
a card.

Is this tiny glass or plastic lens more correctly called by some
other term which I can use for a search?

Thank you.
AJ

PS---I would appreciate any links to info on the typical optical
quality and specification of these lenses. (Usual angle of view,
typical low light sensitivity, depth of focus, etc.) I can guess
these are probably low spec but how low?
 
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John Navas
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      06-13-2009
On Sat, 13 Jun 2009 15:27:52 +0100, Alison J <(E-Mail Removed)> wrote in
<(E-Mail Removed)2.highwinds-media.com>:

>Can I ask you specialists some questions about digital cameras.
>
>I want some info on the optical quality of the lenses used in small
>digital camera units lie this: http://tr.im/onwK.


When you use URL redirection without preview you'll lose much of your
audience, since that's how spammers and scammers work. Instead:
<http://preview.tinyurl.com/kshygw>

>Many sites call that a "pinhole lens" but when I search for
>"pinhole lens" I get hits for lenses created by making a pinhole in
>a card.
>
>Is this tiny glass or plastic lens more correctly called by some
>other term which I can use for a search?


Try "pinhole camera"

>PS---I would appreciate any links to info on the typical optical
>quality and specification of these lenses. (Usual angle of view,
>typical low light sensitivity, depth of focus, etc.) I can guess
>these are probably low spec but how low?


<http://en.wikipedia.org/wiki/Pinhole_camera>

--
Best regards,
John
Panasonic DMC-FZ28 (and several others)
 
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nospam
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      06-13-2009
In article <(E-Mail Removed)>, John Navas
<(E-Mail Removed)> wrote:

> When you use URL redirection without preview you'll lose much of your
> audience, since that's how spammers and scammers work. Instead:
> <http://preview.tinyurl.com/kshygw>


or just use the original url. if it's properly delimited with angle
brackets, it can span multiple lines and remain clickable.
 
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Matt Ion
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      06-13-2009
Alison J wrote:
> Can I ask you specialists some questions about digital cameras.
>
> I want some info on the optical quality of the lenses used in small
> digital camera units lie this: http://tr.im/onwK.
>
> Many sites call that a "pinhole lens" but when I search for
> "pinhole lens" I get hits for lenses created by making a pinhole in
> a card.
>
> Is this tiny glass or plastic lens more correctly called by some
> other term which I can use for a search?
>
> Thank you.
> AJ
>
> PS---I would appreciate any links to info on the typical optical
> quality and specification of these lenses. (Usual angle of view,
> typical low light sensitivity, depth of focus, etc.) I can guess
> these are probably low spec but how low?


You can search on "pinhole camera", as Navas suggests (and in fact, as
is suggested by the title of the page you linked to), or you can add
"CCTV" to your original search: http://lmgtfy.com/?q=cctv+pinhole+lens
 
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daveFaktor
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Posts: n/a
 
      06-13-2009
Alison J wrote:
> Can I ask you specialists some questions about digital cameras.
>
> I want some info on the optical quality of the lenses used in small
> digital camera units lie this: http://tr.im/onwK.
>
> Many sites call that a "pinhole lens" but when I search for
> "pinhole lens" I get hits for lenses created by making a pinhole in
> a card.
>
> Is this tiny glass or plastic lens more correctly called by some
> other term which I can use for a search?
>
> Thank you.
> AJ
>
> PS---I would appreciate any links to info on the typical optical
> quality and specification of these lenses. (Usual angle of view,
> typical low light sensitivity, depth of focus, etc.) I can guess
> these are probably low spec but how low?


The camera is known as : "Camera Obscura" Not sure it that's spelt
correctly but it sound right.
 
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PatM
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Posts: n/a
 
      06-14-2009
On Jun 13, 10:27*am, Alison J <(E-Mail Removed)> wrote:
> Can I ask you specialists some questions about digital cameras.
>
> I want some info on the optical quality of the lenses used in small
> digital camera units lie this: *http://tr.im/onwK.
>
> Many sites call that a "pinhole lens" but when I search for
> "pinhole lens" I get hits for lenses created by making a pinhole in
> a card.
>
> Is this tiny glass or plastic lens more correctly called by some
> other term which I can use for a search?
>
> Thank you.
> AJ
>
> PS---I would appreciate any links to info on the typical optical
> quality and specification of these lenses. *(Usual angle of view,
> typical low light sensitivity, depth of focus, etc.) *I can guess
> these are probably low spec but how low?


You are hurting my brain, but IIRC that type of lens is called a
"Pancake Lens".
 
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Matt Ion
Guest
Posts: n/a
 
      06-14-2009
daveFaktor wrote:
> Alison J wrote:
>> Can I ask you specialists some questions about digital cameras.
>>
>> I want some info on the optical quality of the lenses used in small
>> digital camera units lie this: http://tr.im/onwK.
>>
>> Many sites call that a "pinhole lens" but when I search for "pinhole
>> lens" I get hits for lenses created by making a pinhole in a card.
>>
>> Is this tiny glass or plastic lens more correctly called by some other
>> term which I can use for a search?
>>
>> Thank you.
>> AJ
>>
>> PS---I would appreciate any links to info on the typical optical
>> quality and specification of these lenses. (Usual angle of view,
>> typical low light sensitivity, depth of focus, etc.) I can guess
>> these are probably low spec but how low?

>
> The camera is known as : "Camera Obscura" Not sure it that's spelt
> correctly but it sound right.


That is spelled correctly, but that's not what he's talking about.
That's what his searches keep finding, it's not what he's looking for.
 
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dj_nme
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Posts: n/a
 
      06-14-2009
Alison J wrote:
> Can I ask you specialists some questions about digital cameras.
>
> I want some info on the optical quality of the lenses used in small
> digital camera units lie this: http://tr.im/onwK.
>
> Many sites call that a "pinhole lens" but when I search for
> "pinhole lens" I get hits for lenses created by making a pinhole in
> a card.


That's called "'pinhole lens" because the hole the video camera needs
for it's lens to poke through is very small, it looks a bit like a
pinhole and can sometimes be concealed behind a pop-rivet or what looks
like a hole left by a missing srew.

> Is this tiny glass or plastic lens more correctly called by some
> other term which I can use for a search?


The lens could perhaps be better described as an "afocal lens", because
everyting appears to be in focus (or at least equally blurred) and thus
does not need to be focused during installation.

> Thank you.
> AJ
>
> PS---I would appreciate any links to info on the typical optical
> quality and specification of these lenses. (Usual angle of view,
> typical low light sensitivity, depth of focus, etc.) I can guess
> these are probably low spec but how low?

 
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PatM
Guest
Posts: n/a
 
      06-14-2009
On Jun 13, 8:48*pm, PatM <(E-Mail Removed)> wrote:
> On Jun 13, 10:27*am, Alison J <(E-Mail Removed)> wrote:
>
>
>
> > Can I ask you specialists some questions about digital cameras.

>
> > I want some info on the optical quality of the lenses used in small
> > digital camera units lie this: *http://tr.im/onwK.

>
> > Many sites call that a "pinhole lens" but when I search for
> > "pinhole lens" I get hits for lenses created by making a pinhole in
> > a card.

>
> > Is this tiny glass or plastic lens more correctly called by some
> > other term which I can use for a search?

>
> > Thank you.
> > AJ

>
> > PS---I would appreciate any links to info on the typical optical
> > quality and specification of these lenses. *(Usual angle of view,
> > typical low light sensitivity, depth of focus, etc.) *I can guess
> > these are probably low spec but how low?

>
> You are hurting my brain, but IIRC that type of lens is called a
> "Pancake Lens".


Here is the DSLR version of a pancake lens, which they say in
knicknamed a pin lens:
http://www.loreo.com/pages/products/loreo_lenscap.html

It might be what you are looking for.
 
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Bob Larter
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      06-14-2009
The Correction Police wrote:
> they left off. Taking a <5mW $10 green laser-pointer's optics and finely
> tuning it to <1.05 mRads divergence. As long as I'm in there fiddling with
> things I will also ramp-up the output to ~75mW.


HAHAHAHAHAHAHAAHAHAHAhahahahahahaha!

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. | ,. w , "Some people are alive only because
\|/ \|/ it is illegal to kill them." Perna condita delenda est
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