SJ7 and InfraRed

Discussion in 'SJ7 Star' started by RBEmerson, Dec 8, 2017.

  1. RBEmerson

    RBEmerson Humbled by events

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    @Jason I can't find your post about the SJ7 and IR but... I just looked at three different "clickers" with my camera, and there they are flashing and shining away with each button push. Thanks for the tip!
     
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  2. Jason

    Jason Moderator

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    If would wanted to invalidate your warranty and unscrew the lens to remove the IR-CUT filter you'd find that videos and photos in daylight get a funky look withing that reflect in (e.g foliage) suddenly taking on pink and white hues
     
  3. RBEmerson

    RBEmerson Humbled by events

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    Trust me, I've got more than enough funk at the moment. LOL
    When I was fooling around with attaching webcams to telescopes for imaging, adding an IR filter was a big deal. Without one, focusing an image running from just into UV to well into the IR was no easy feat. Filter, filter, filter was the rule. 'Course, that was at a point where saturating one CCD cell meant the entire row or column was saturated, too. That left a white streak across the full image.

    Good point about needing an IR source for nighttime shooting.
     
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  4. Jason

    Jason Moderator

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    You could stand there with all the remote controls you own lighting the scene :rolleyes:

    I think I have an old cheapo interpolated knock off in a draw somewhere. Think I'll pull off the IR-Cut and give it a try - if I still have it.
     
  5. RBEmerson

    RBEmerson Humbled by events

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    Now there's an idea. Not a good idea, but an idea nonetheless. [/wink]

    I'll be interested to see how it works out.
     
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  6. Jason

    Jason Moderator

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    Only edits were to resize them so the file sizes were small enough to post

    A still from a video on a windowless landing with no lights on, illuminated only by the pulses of a remote control
    shot0046.png

    Lush green leaves illuminated by electric heater
    Lush Green Lemon Bush.JPG

    Kitchen lit through partially open door behind the camera (notice colour of the green succulent plants on the right above the washing machine)
    Kitchen.JPG
     
    Last edited: Dec 8, 2017
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  7. RBEmerson

    RBEmerson Humbled by events

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    Wow!
     
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  8. Jason

    Jason Moderator

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    Funky eh!
    This is the clip lit by the remote control
     
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  9. RBEmerson

    RBEmerson Humbled by events

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    Thanks for helping me lose some sleep, mate...
     
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  10. Jason

    Jason Moderator

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    We all have our demons - mine happen to be nailed to my walls. That was a Citipati mask from the Himalayas
     
  11. RBEmerson

    RBEmerson Humbled by events

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    Well, turn its face to the wall and say "nighty-night". [/wink]
     
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  12. jlo138

    jlo138 New Member

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    812BA6D6-CF80-4806-8375-954A1653858F.jpeg You can also use gel lighting filter paper to do effects like this picture. Taken with an SJ4000 and attached a Lee Congo Blue filter.
     
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  13. TonySosa

    TonySosa Administrator Staff Member

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    Sweet stuff guys!
     
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  14. Jason

    Jason Moderator

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    @jlo138 Very Nice

    Here's a view out of the window
    2015_0101_142859_001.JPG
     
  15. jlo138

    jlo138 New Member

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    Yup. That’s what it normally looks like. Some cameras more pink and some more purple than others. The SJ4000 is more on the less saturated purple side and the SJ6 Legend is just that your picture. It looks like this because it can now see in infrared and ultraviolet wavelengths we can’t see.
     
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  16. jlo138

    jlo138 New Member

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    If you want cheap IR light, then buy a Reptile Heat bulb. Get the black one and you’ll see a dim visible glow but the camera will see a lit up area. Bulb is about $6 U.S. It gets hot but not too much hotter than a standard incandescent bulb if the same watts.
     
  17. Jason

    Jason Moderator

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    Looking at the specs for the Congo blue it looks like it attenuates visible light more than uv or if. sweet.

    Somehow I don't think that I'll get the same results from the wrapper of a Quality Street Brazil nut.
     
  18. jlo138

    jlo138 New Member

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    Lol. It actually blocks visible light and allows infrared light to pass through. My method is more DIY so it’s not blocking visible light 100% . I’ve used the same filter paper to turn an incandescent flashlight to infrared only but it takes about 4 layers to block the visible light out.

    You can also use film negatives as a visible light blocker/ir pass.
     
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  19. jlo138

    jlo138 New Member

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    D0D1C673-3F58-4E65-97A5-66C68AA4CCBA.jpeg Here’s another with the SJ4000 but using a Lee “Blood Red” filter. This one is over the lens and not behind it like the blue one. I’m using a “UV Lens Cap” to hold the filter over the lens so I can remove or change them out as preferred. 8am here and all the bright white spots are the morning sunlight. I bought a Lee Filter Sample book off eBay for $6 and it has tons of colors and enough to cut a filter out of. Some don’t do much aside from changing the tint but others will block visible light more than others.
     
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  20. jlo138

    jlo138 New Member

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    A099810B-DE08-487F-A833-85F4943F0A37.jpeg 2C4B3EEE-34E1-4670-8731-D0A7C66151C4.jpeg Here’s a couple more. SJ4000 with Lee Aurora Borealis Green and Lee Blood Red. The previous post is supposed to be Lee Marius Red. Couldn’t tell if the filter info was on top or bottom. Bottom apparently...
     
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