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YUKON NV SIGHTS.

Discussion in 'Night Vision Optics and Illumination' started by leecraw66, Feb 22, 2014.

  1. leecraw66

    leecraw66 Donator

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    Evening all, am thinking of upgrading my NV sight. Have been looking at either a Yukon NVRS-F Tactical 2.5 x 50 or a Yukon Sentinel Tactical 2.5 x 50. It will sit on a HW80 so has to cope with a little bit of recoil. Wondered if anyone has had any experience with either and what was thought of them.
    Thankyou Lee.
     
  2. kermitboy1

    kermitboy1 Banned

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    Hi mate, my boss bought one of these models last week, not sure exactly which model he got, but I know that he is very impressed by the performance. He said that it was well worth the price. Cheers KB1
     
  3. keithy

    keithy Keyboard Hero

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    Hi i was seriously considering a yukon photon until I had the opportunity to have a good look through one, the picture is adequate but not great, the main problems are the picture is on the small size so its hard to find the rat you are going to shoot and focusing is very critical at short range but fine at long range. I had another look through one at the shooting show and this one seemed better but it had an auxcillary power pack attached to it. Ended up with Nite site NS50 which is much better for finding your target and the picture is much brighter and sharper. ;)
     
  4. terry1001

    terry1001 Major Poster

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    You may find that the 2.5x magnification is a bit too low and the technology (Gen 1 tube) is quite old. A digital add on for existing scope might be an option and if you go the diy route would give much better performance at less cost. The Photon is also an option and can be used in daylight although not as sharp as a conventional scope.
    A decent digital add on and scope is likely to be the best option for most people.
     
  5. sqwiffy

    sqwiffy Engaging Member

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    "A decent digital add on and scope is likely to be the best option for most people."

    Agreed..... however limited on range by the light source.

    My (DIY) LED setup illuminator is stunning upto about 50yds. Works up to about 75yds, but I need to find a good replacement for 150 - 200yds.

    Maybe the Osram pil is the way to go, since I cannot find a Chinese pil that is not a 'Nest' of low power chips that cause shadows in the focused image.
     
  6. leecraw66

    leecraw66 Donator

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    Please forgive me, you lost me at 50yds. I shoot a few rats with an HW8O not a sherman tank.

    Thankyuo Lee.
     
  7. FGYT

    FGYT Engaging Member

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    was watching rabbits at 150yrds on 20 x mag with a T20 940nm 3mode Osram (plus a doubler ) last night if it hadn't been on a 177 airgun would have been an easy shot
     
  8. sqwiffy

    sqwiffy Engaging Member

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    Would that range be with the Osram Black series 3W (input) or the Osram Ostar 12W (input) ?


    What does the led look like, is it a nested cluster, or a single chip?


    Thanks.


    The Chinese one I have is around 850nm 2W in a cheapo Ultrafire single cell torch housing.
    http://www.banggood.com/Wholesale-U...LED-Flashlight(1x18650-Or-3xAAA)-p-43332.html
    With a few mods + extra lenses I've got a clean focussed square of 650mm at 25m. This enables x24 magnification on the scope out beyond 40 yds.

    Total cost about £15 ish


    I recon tho I will have to bite the bullet and build a new two cell unit utilising an Osram, the model being subject to your recommendation!
     
    Last edited: Feb 27, 2014
  9. terry1001

    terry1001 Major Poster

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    The Oslon Black high power led (s suffix) is the most effective one for use with an aspheric lens, the led itself is a single emitter slightly less than 1mm square so it focusses well. The 850nm light is more effective than 940nm as the cameras are about 4x more sensitive to the shorter wavelength. The 850nm one does emit a tiny amount of visible red light but it's less visible than a lit cigarette, there is no visible beam of light at all from either led.
    High scope magnification reduces the amount of light getting through to the camera sensor and it also makes it more difficult to find the target. The effective range of an illuminator will depend to some extent on the torch design, larger diameter lenses tend to focus the beam more tightly, but is highly dependant on the camera sensitivity, the lens used and the scope. Coated lenses can cut the amount of ir being transmitted and, in some cases, block it entirely.
     
  10. FGYT

    FGYT Engaging Member

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    Last edited: Feb 26, 2014
  11. r10hunter

    r10hunter Honorary Member

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    Why such a tight beam and so much mag? Don't you find it hard to find your target. Would you not be better with a torch that filled 3 mag if need be.
    The zoom t20 torches are popular there are a couple of guys that make them on here at good prices.
    Cheers Andy
     
  12. sqwiffy

    sqwiffy Engaging Member

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    So I can look them in the eyes!!


    It does if I zoom out.


    For ratting in my garden (how it all started) they leave the wood pile and leg it 3 feet to the bait by the hens fence. So I don't need much of a beam width. A higher magnification also enables a better placed shot.
    I am an engineer. I make, mend, design and develop my own gear. Like most of us we get some of our kicks from experimenting, understanding and fettling.


    I don't think the zoom T20 is actually much different from what I already have. Good luck to the guys making them for sale on here but when I built mine, there was pretty much nothing on the market. All I am trying to do now is improve on what I have.


    Ultimately , I just want an illuminator that will give me a good picture at 150-200m (for fox) using a my scope & camera setup. I don't want the lesser quality of an intensifier....yet.


    I'm sure the Yukon scopes work, and appear to be a good products, however, they are essentially low power scopes with a gen 1 + tubes & camera setups. Which you then have to purchase a doubler and adapter rings to get to a half decent magnification.


    If have to go down the intensifier route then I would probably tear down an old scope and add a Gen 1 tube myself. At least I would be starting with a good magnification range.
    Gen 1 tubes available from £30 up.


    Thanks Terry for the info, the 1mm square appears to be identical to what I have. From memory the input power is not far different. (will check later when I have time).
    Can't see the output power of the Osram is going to be an order of magnitude better. The Ostar seems to be a nest of emitters, so its back to square one.


    I don't quite get it...... the Cree daylight leds 5Watt etc seem to be a single chip, just big. If somebody did the same but IR the problem would be solved.

    Thanks to all for your help.
    Sqwif
     
  13. FGYT

    FGYT Engaging Member

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    Looking at it the Osram is the pretty std chip used by all builds But as you say if its not a sensible increase on what you have may not be worth having

    the important bit seems to be the lens you put in front of it Bigger is better and quality is better now also multi lens seems to be improving again over single aspheric
    the T20 seems to lend its self to several tho not plug on increases in lens, ones that only need a small amount of Shedineering (wish i still had access to a CNC lathe and full shop :( )

    For me an easy upgrade for more light would be to change to a 850nm IR pill which should give 4 x the light over the 940nm Im choosing to use

    there are some who are adding to the smaller P60 torches like the 501 etc


    heres a video from Marky610 comparing various Lens increases im pretty sure they all use the same pill all are bigger than the std T20 in head size the Ranger is the next head im waiting on to try on my T20
    https://www.youtube.com/watch?v=AA89u6p2Gu0
     
  14. FGYT

    FGYT Engaging Member

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    Because we can and want to try ................Simples I cant use a 3 mag scope any more after a couple of decades on min 10 x tho I am considering a downgrade to a 6-24 ............... maybe

    remember the Add on is to a day scope so I want to use my std day scope not make a dedicated Night scope/rifle combo might as well buy a photon
     
  15. r10hunter

    r10hunter Honorary Member

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    But how do you find a rabbit in a field with such a tight beam and so much mag. As well as know where the gun is actually pointing. Do you use a hand held spotter first or something?
    Cheers Andy
     
  16. sqwiffy

    sqwiffy Engaging Member

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    Big vs Small


    Does not follow..............A small good quality lens will have the same or better performance than a bigger lesser quality lens, from surface finish alone.... 'Scratch-dig' designation.


    The Osram & Chinese copy pills are specified as having a 70° beam angle, the torch lens has to be 'covering' all of this. Personally I think 70° is a figure given to say >75% of the beam. Then to make matters worse the dippos go and encapsulate the pill with a rubber lens making the beam even wider and the issue even worse.


    So a big single lens works because it encompasses more of the beam, it might at the same time have a better focal length. However....
    If you chop the rubber lens off, to get the pill back to book spec. and use a second lens in front to act as a the first collimation stage. Then the main adjustable lens positioned more or less as before. The whole arrangement has better performance but less bulk and weight.


    So don't be fooled into thinking that 'Bigger is better' We don't live across the pond!


    Sqwif
     
  17. FGYT

    FGYT Engaging Member

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    definalty but Bigger is fairly easy to do

    how are you getting on cutting back the Pill rubber lens and what sort of lenses are you looking at for the collimation stage.

    Ive jsut replaced teh Front of my T20 with a Yukon Ranger head its a multi lens set and smaller than some of the other add ons but still have the pill lens

    Would be good to build my P60 derivative into a powerfull light unit
     
  18. sqwiffy

    sqwiffy Engaging Member

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    Sharp scalpel. Cut the bulk then second cut as close as you dare to the chip. Better finish, less dispersion.


    ø20mm bi-concave. had it years. Never throw anything away.... might come in handy!


    Sqwif
     

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