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Lens aperture

Discussion in 'Night Vision Optics and Illumination' started by Dicer, Jan 22, 2014.

  1. Dicer

    Dicer Donator

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    Can someone explain about the different lens apertures, I've seen on here people recommend that a 16mm lens should be f1.4 or f1.6. Does it matter that the one I've ordered is f2.0 should I order another.
     
  2. terry1001

    terry1001 Major Poster

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    The f numbers indicate the relative amounts of light that lenses will pass. A f1.4 lens will pass twice as much light as one of f2.0. It's not quite as bad as it sounds and your lens should be fine. It might reduce your maximum range by 5 yards or so and you can make that up with a little more ir light.
     
  3. Dicer

    Dicer Donator

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    Cheers Terry I've ordered another which is f1.6, I'm starting to wonder if I will ever get the chance to use a night vision setup, the rest of my days will be spent sat at a table with loads of random parts and bits saying I wonder if it would be better with one of those.
     
  4. Fred_Bear

    Fred_Bear Well-Known Member

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    Hi

    If you are talking about digital camera type lenses there is also a direct relationship between the f value, shutter speed, and ISO setting. If not applicable to night vision ignore my ramblings!
     
    Last edited: Jan 23, 2014
  5. terry1001

    terry1001 Major Poster

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    If you've got plenty of spares you can do a mix and match to see what works best or you can make a second one and sell it :up:
     
  6. Flykilla

    Flykilla Engaging Member

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    I think its safe to say that the vast majority of people on here might have built up a few spare parts on the way. I have a medium size cardboard box of wires, lenses, camera housings etc. Its all part of the fun. Crack on mate and put it all together and see how your first build performs. I am sure you will modify the camera again at some point. I am currently working on my 6th version.
     

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