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Thread: Night vision solution for brush development / general D.Room work

  1. #1

    Night vision solution for brush development / general D.Room work

    Hi all,
    I would like to have your opinion re this idea of mine. I do brush processing, in darkness obvs and it is long and boring. Would be nice of course to see in the dark. Yep I could buy night vision goggles (expensive) so i thought what about this...
    I have a digital (professionally converted to full IR) IR camera, it is very light weight.

    If i turn on an IR light in the darkroom, I could then turn on the IR camera and use its screen for night vision.
    I could construct a little rig above the dish so i can look at what I am doing with the brush when I develop.
    Does anyone think this is viable?

    I guess my questions are 2:
    1. will the IR camera "see" with the IR light?
    2. can normal panchromatic film be fogged by the IR light in the darkroom? (that is the big question)

    I tried to google question no 2 specially, with no luck. Can anyone here help me?
    thanks in advance.
    Of course the price of an IR light is so low, I could test this idea anyway, but I would like to know in advance if it is a no-go from the start! (time is...)

  2. #2
    Matt Alexander
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    Re: Night vision solution for brush development / general D.Room work

    The cameras LCD screen will likely cause fogging. Night vision goggles have very tiny screens that are sealed in the eyecups.

    But to answer your question - no, panchromatic film will not normally be fogged by IR. I sometimes use a cheap set of IR goggles in my darkroom with panchro and color materials.

    BTW - I use these 'Toy' IR goggles - not very high resolution but they work well for what I need. I did need to seal the 'flip up' hinge with a layer or 2 of electrical tape...
    https://www.amazon.com/Spy-Gear-Ulti.../dp/B011NMEVHG

  3. #3

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    Re: Night vision solution for brush development / general D.Room work

    Quote Originally Posted by almostpilot View Post
    1. will the IR camera "see" with the IR light?
    Yes, this is a tipical sensor spectral sensitivity:

    Click image for larger version. 

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    In a regular camera a cut-off filter removes IR light beyond (around) 700nm wavelength, as you see in the grapp an IR converted camera should even reach around 900nm


    Quote Originally Posted by almostpilot View Post
    2. can normal panchromatic film be fogged by the IR light in the darkroom? (that is the big question)
    This is TMX spectral sensitivity:

    Click image for larger version. 

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    As you se an IR (common) illuminator that works beyond 750nm would be safe, check datasheets of films and of illuminators. Perhars IR power should no exceed a certain level/time, not sure, but I handle film under IR with no problem.

    _____________________________-

    I DIY made an "IR vision system"...

    With this 7€ Dash Camera, which includes internal battery, camera and screen.

    Click image for larger version. 

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    Click image for larger version. 

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    That focal is not very suitable (too wide), but works well enough for my sporadic usage...

  4. #4

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    Re: Night vision solution for brush development / general D.Room work

    Quote Originally Posted by malexand View Post
    The cameras LCD screen will likely cause fogging. Night vision goggles have very tiny screens that are sealed in the eyecups.
    Yes...

    but this is a $8 sealed eyecup for dslr screens:

    Click image for larger version. 

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  5. #5

    Re: Night vision solution for brush development / general D.Room work

    WOW
    great responses Thank you all!
    Pere Casals would you give me a link for the dash camera ? and for that matter for the eyecup too! thanks so much

  6. #6

    Re: Night vision solution for brush development / general D.Room work

    Can you send a link or the name of the camera? I can then see if i can buy it in Europe

  7. #7

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    Re: Night vision solution for brush development / general D.Room work

    Quote Originally Posted by almostpilot View Post
    Can you send a link or the name of the camera? I can then see if i can buy it in Europe
    https://www.ebay.es/itm/HD-2-4-LCD-1...wAAOSw4klbWD5K

    It says 1080 lines, but this is the video recording resolution, the screen has way less. There is a button to power the IR LEDs in the front, check fogging with your film, I don't think, but if you get fog then you may use another IR illuminator.


    You may attach a supplemantary lens for smartphones to make the focal a bit longer, also you may use two cameras of those for stereo... for that price...

    The battery lasts perhaps 15min, but you mau connect an small "battery pack" for smartphones, that lasts for hours

    Also you can record your session

  8. #8

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    Re: Night vision solution for brush development / general D.Room work

    This is what I use: https://nightfoxstore.com/products/n...vision-goggles

    Certainly not as cheap as Pere solution, but not terribly expensive by night vision goggle standards.

  9. #9

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    Re: Night vision solution for brush development / general D.Room work

    Quote Originally Posted by Alan9940 View Post
    This is nice because it has 1x view!

  10. #10
    Tin Can's Avatar
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    Re: Night vision solution for brush development / general D.Room work

    sin eater

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