Author Topic: Night vision  (Read 207 times)

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Offline Baggawind

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Night vision
« on: November 14, 2017, 09:16:02 AM »
This is a question aimed at Blerky. Thought i,d put it in the appropriate section. Blerky, did you overcome the problem of getting a sharp picture ? I know we both bought the same camera, torch, etc., and i,m having the same problem. I,ve tried altering the camera focus and the eye relief but still can,t get what i would call a clear image. Even altering the parallax makes no difference. I,m starting to think the camera is the problem. My own camera and the one i,ve bought for the second build came from Sure 24, the place recommended by those in the know. Trouble is, they are much more expensive. How have you set your screen settings, that is, brightness , contrast and saturation ?

Offline IceBlerk

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Re: Night vision
« Reply #1 on: November 17, 2017, 11:34:30 AM »
Hi, baggy.

Sorry I haven't replied more promptly, our main customer has moved into their peak business period of the year and, as a result, I've been busy.

I haven't completely overcome the issue with the sharpness of my image (personal or video!) but here's what my crosshair looks like : Crosshair.

And here's a clip showing the picture quality under normal use (distance to target is between 14 and 20 yards) : A Sharper Picture?

My scope is set to x4 magnification and altering the AO seems to have little to no effect on the picture quality, especially at short range. When I HAVE seen a change in focus using AO is seems to be disproportionate. To explain that; let's say that the target image at 15 yards is sharp but at 25 yards it is not so I alter the AO but have to go to an AO setting of 35 yards to achieve sharpness (an increase of 20 yards on AO to move 10 yards from target to target).

The numbers in that example are not accurate, just plucked from thin air to explain what I mean.

Having said that, the improvements in image quality when faffing with the AO are so small that I've stopped working about them for now.

Also, I have noticed that the quality of the image of the peripheral areas of the image are invariably better than the centre where it can appeared blurred. And that's annoying!

I've left my screen settings at the default since putting things together.

The image quality is always better and AO adjustment more effective when operating in daylight and IR is not involved. 12 yard target.

Another irritation is that I now have interference lines tracking across my screen. A power cable in the project box must be too close to one of the video leads since I had to reshuffle them when the whole thing died last week.

Offline Baggawind

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Re: Night vision
« Reply #2 on: November 17, 2017, 01:36:13 PM »
That is just like the problems i,ve been having. I asked the same question on another forum, the guy on there is a real expert on all things night vision. He said, firstly focus your scope to get a real, pin sharp reticule then focus the camera likewise at 6 feet. Then fit the camera to the scope and adjust the camera to maintain a clear reticule. It worked quite well with the the old boys rig. Still not as good as my personal kit but not too bad. Now I have another problem. The second build is proving to be a real pain. I bought a better, more expensive camera, the same as the one in my rig. I went through the whole rigamarole of setting it up and, initially , it worked quite well. Then after switching it off then on again I got a blank, white screen. Switching it on and off made no difference so I put it down and had a think. After a couple of minutes I switched it back on again and bugger me, it worked again. This has happened three times now and its driving me mad. The only thing I can do is try swapping cameras and screens around to try and find the faulty part. I wont be doing another , it is just stressing me out too much.

Offline IceBlerk

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Re: Night vision
« Reply #3 on: November 17, 2017, 01:50:18 PM »
it is just stressing me out too much.

Come on, Baggy! Where's your sense of humour? It wouldn't be worth doing if it was easy. (I used to know a woman like that.)

Offline IceBlerk

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Re: Night vision
« Reply #4 on: November 19, 2017, 10:30:34 AM »
Baggy; here's a link to a video of another way to build/use DIY NV.

https://www.youtube.com/watch?v=owyUMuIGRow

Offline IceBlerk

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Re: Night vision
« Reply #5 on: November 19, 2017, 10:49:34 AM »
Here's another video.

The kit may be different but the principles may apply regardless.

https://www.youtube.com/watch?v=BJ1vnKtV3gs

Offline IceBlerk

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Re: Night vision
« Reply #6 on: November 24, 2017, 02:07:46 PM »
Hi, Baggy.

I've been over to the dark side and found the following advice on another (inferior) forum:

"One of the main reasons for choosing an add on is to be able to use your scope under all conditions. Using the add on should simply be a case of slipping it onto the scope and removing it the same way for daylight shooting. The best process for setting up an add on is:
set your scope for day use, mainly by setting the eyepiece for a pin sharp view of the reticle. Target focussing is then done with the AO or SF - do not touch the eyepiece once it is set. It is virtualy essential to have a scope with focussing for use with a rear add on.
Start with the camera giving a good, sharp image at about 6 ft and then fit to the scope
Adjust the camera focus until the reticle is properly focussed. You may find that the camera won't focus because the lens can't be screwed out far enough without coming out. This means that your lens is not suitable, you can sometimes find extension adapters (difficult) or get a lens that is properly made. Most of the time it's fine.
When the camera is focussed lock the lens in place. If there's no grub screw then a small piece of tape over the thread and housing will do the job, some cameras do have a locking ring which is good. NEVER use loctite etc as this will cloud the lens and make it useless.
In use focus on the target with the AO or SF
If you use the add on in daylight you will probably notice slightly strange colours and some image ghosting as you will have 2 images, one from the white light and the other from ir light - there's a lot of ir in daylight. This is the main reason that cameras have ir cut filters, they normally give colour correction as well.
"

It sounds like we're exploring the correct avenues to achieve focus and clarity, it's just a matter of getting it right!

Online seagate

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Re: Night vision
« Reply #7 on: November 24, 2017, 06:35:43 PM »
 A good read .
    :)
I plink , therefore I am.

Offline Gambo

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Re: Night vision
« Reply #8 on: November 25, 2017, 12:28:40 PM »
I've been over to the dark side and found the following advice on another (inferior) forum.

smited :P ;D

Offline IceBlerk

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Re: Night vision
« Reply #9 on: November 25, 2017, 11:16:33 PM »
I've been over to the dark side and found the following advice on another (inferior) forum.

smited :P ;D

Bugger!