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Digital Camera
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Infrared filters from
Harrison and Harrison
Click on the pictures to download the original full size Jpegs |
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Read
our article on shooting Digital Infrared
in the February 2002 Shutterbug Magazine |
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Visit our Digital
Infrared Web Site to see more pictures like these |
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Check out
our new Sony DSC-F707 Infrared Gallery |
January 19th
The top three images were taken in Florida
with the 46mm 88A filter I just received from
Will Harrison.
There is still a hot spot. I'm thinking that it might be
reflections from the internal elements of the lens. Maybe the paint that
is used to coat the lens barrel. I've been able to
minimize the effects by shooting subject matter that has lighter areas in
the center and also by working from a slightly underexposed image. It's strange that the third picture down clearly shows the
effect more than the first two. Interesting to note is that I shot a
picture of the blue sky which shows as black, and it shows almost no
sign of the hot spot until I run auto levels
where it becomes very pronounced. |
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Click on the pictures to download the original full size Jpegs |
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| The camera was set at. ISO 100, I
bracketed the shutter speeds at 1/2, 1 and 2 second exposures at 2.8 at
full 28mm wide angle. For all three pictures I think I used the 1/2 second
setting. |
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Click on the pictures to download the original full size Jpegs |
Straight from the camera |
Auto Levels |
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original full size jpeg to do your own investigating |
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The pictures below were taken with a
72mm 88A
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January 2nd
Hard to tell how much infrared sensitivity the CoolPix 5000
has because of the time of year these pictures were taken. That's snow on
the ground in the top picture. I'll be traveling to Florida in mid January
and will be able to do some more testing. But since the 88A cuts off all
visible light it's safe to say that the CoolPix 5000 does have infrared
sensitivity. In the bottom picture you can see where the 88A turned the
blue sky black. All were taken with the camera set on auto focus.
The top two were taken on manual exposure at approximately 1 second at
F2.8 and the bottom was taken on auto exposure. |
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| One more issue. In shooting with
the 72mm filter there appears to be a centered bright hazy
circle. This example picture is the actual reduced file that has been
enhanced in Photoshop with Auto Levels to make the circle more
prominent. The circle is larger when the lens is zoomed to the widest
setting and smaller when zoomed to telephoto. It's possible that the
88A filter is acting like a mirror and the lens is seeing itself. It's
too bad Nikon didn't provide a way to screw the filter directly to the
lens for a more accurate test. I'll be ordering a 46mm filter to test
it without the three step up rings so see if there's a difference when
the filter is closer to the lens. You can also see examples in the
sample infrared pictures in this page if you look closely. |
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The 72mm was originally for the WC-E63
and TC-E3
wide angle and telephoto lenses for the CoolPix 950/990/995.
I've now confirmed that the 46mm filter also causes the circular hot spot. |
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The 72mm 88A filter was adapted to the CoolPix 5000 through
a series of adapter rings.
See our resource page on CoolPix 5000
filter adapters |
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Digital Camera
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