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Attached is what you get when you cross one of these:
http://www.fujilab.co.uk/catalog/images/magnifier%20loupe10x.jpg
with one of these:
http://www.letsgodigital.org/images/artikelen/6/canon_powershot_g7_zoom.jpg
I was amazed that I could resolve the black gaps inside this LCD pixel that
are only 1800 nm wide - that's just 3x the wavelength of red light! And
with a old consumer digital camera and 1 euro magnifying thingy.
Post a reply to this message
Attachments:
Download 'image1.png' (130 KB)
Preview of image 'image1.png'
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"scott" <sco### [at] scott com> wrote:
> Attached is what you get when you cross one of these:
>
> http://www.fujilab.co.uk/catalog/images/magnifier%20loupe10x.jpg
>
> with one of these:
>
> http://www.letsgodigital.org/images/artikelen/6/canon_powershot_g7_zoom.jpg
>
> I was amazed that I could resolve the black gaps inside this LCD pixel that
> are only 1800 nm wide - that's just 3x the wavelength of red light! And
> with a old consumer digital camera and 1 euro magnifying thingy.
That looks neat. I have a G10 which (I think) uses the same optics and has
increased resolution to 14.7Mp (though the G11 went back to 10. Maybe 14.7 is
OTT) and would be interested to know a few more details of how you did it.
I guess the image fragment you provided was part of a much larger 10Mp image.
Thanks for the idea, and pre-thanks for any more details.
Post a reply to this message
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> That looks neat. I have a G10 which (I think) uses the same optics and has
> increased resolution to 14.7Mp (though the G11 went back to 10. Maybe 14.7
> is
> OTT) and would be interested to know a few more details of how you did it.
I zoomed in the camera lens to maximum, and changed to manual focus. I held
the loupe to the front of the lens with a couple of bits of blu-tak, but
also I could hold it by hand well enough to get a good shot. After that it
was just a matter of holding the camera steady relative to the LCD and
adjusting the manual focus to get a sharp image.
> I guess the image fragment you provided was part of a much larger 10Mp
> image.
Yes, as you can imagine there was severe distortion and blurring around the
edges of the frame, but there was a sizeable region in the centre that was
well in focus and free from distortion.
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scott wrote:
> Attached is what you get when you cross one of these:
People laughed when I held my binoculars up to my camera, but that works
surprisingly well too, if you have a small-lensed camera.
--
Darren New, San Diego CA, USA (PST)
Yes, we're traveling together,
but to different destinations.
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On Wed, 31 Mar 2010 08:38:25 -0700, Darren New wrote:
> scott wrote:
>> Attached is what you get when you cross one of these:
>
> People laughed when I held my binoculars up to my camera, but that works
> surprisingly well too, if you have a small-lensed camera.
Yep, I still have film I haven't had developed from college where I did
that to get photos of aircraft in flight. The ones I did get developed
turned out pretty good.
Jim
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> People laughed when I held my binoculars up to my camera, but that works
> surprisingly well too, if you have a small-lensed camera.
You can also get surprisingly good results by attaching a $20 webcam to a
telescope. Especially if you record a video for a minute or so and then use
special software to line-up and average all the frames into one image.
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On 3/31/2010 4:16 AM, scott wrote:
> Attached is what you get when you cross one of these:
>
> http://www.fujilab.co.uk/catalog/images/magnifier%20loupe10x.jpg
>
> with one of these:
>
> http://www.letsgodigital.org/images/artikelen/6/canon_powershot_g7_zoom.jpg
>
> I was amazed that I could resolve the black gaps inside this LCD pixel
> that are only 1800 nm wide - that's just 3x the wavelength of red light!
> And with a old consumer digital camera and 1 euro magnifying thingy.
>
I'll have to drag out my extension tubes and reversing ring +50mm 1.8 to
see what magnification I get on an LCD screen, now ... ;)
--
~Mike
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