Is it the boardcam, or the scope...

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Daan
Posts: 7
Joined: 14 Dec 2015, 22:47
Location: Netherlands

Is it the boardcam, or the scope...

Post by Daan » 15 Dec 2015, 11:09

Hi guys,

I just introduced myself here on the board, where I also posted pictures of my diy NV build:
viewtopic.php?f=16&t=13570

Yesterday I've done some shooting with my setup and came across some issues...some of them I found a solution for, but for one I wanted to gather some advice from you guys. I've seen some of your videos and it seems like you are getting more viewing distance with some of your (likely the same) setups.

I found it hard to see details with the Ir fully focused on 10x mag at targets further than +- 60 meters!?
I tried all the different setting from the camera in the OSD and also removed the Ir filter before mounting all together.

I'm running a 700tvl boardcam, 12mm lens (16mm broke accidentally), 4.3" tft, 12V 1800mah Lion, T20 Ir torch icw a 3-12x40sf Discovery VT scope.

This is the camera I used:

Image

Image


And here are the given specs from the sellers add:

Features:

1/3 Inch SONY Effio-E DSP CCD

700 TVL High Resolution

Mini Illumination 0.01lux

16mm Lens

Audio output

OSD Menu

8 Language to choose

Mini 36*36mm Size

Specifications:

Image Sensor: 1/3'' SONY Effio DSP CCD

Pixel : PAL:976 (H)× 494(V) NTSC :976 (H) ×582 (V)

Horizontal Resolution : 700TVL

Sensitivity :0.01Lux

Lens :16mm

Angle:20 Degree

Audio output: Yes

Video Output :1.0VP-P / 75 ohm Video 0.714V p-p Sync 0.286Vp-p

Sync. System: Internal Sync

Luminance S/N Ration :50dB Min ( AGC off )

ESC: (NTSC - 1/60 ~ 1/60.000), (PAL – 1/50 ~ 1/60.000)

Manual Shutter: 1/60, 1/250, 1/700, 1/1K, 1/1.6K, 1/2.5K, 1/5K, 1/7K, 1/10K, 1/30K, 1/60K, 1/120K

DNR: LOW, MIDDLE, HIGH, OFF

White Balance: ATW / MANUAL / PUSH

SBLC: OFF / LOW / MID / HIGH

AGC :OFF, ON

Day / Night :COLOR, B/W, EXT, AUTO

Motion Detection :ON / OFF (4 Programmable Zone)

Privacy :ON / OFF (4 Programmable Zone)

Mirror :HORIZONTAL

Sharpness :1 - 20

OSD Language :Chinese/English/Spanish/Japan/French/ German/Portuguese/ Russian

Supply Voltage :12V DC (+10% -20%)

Power Consumption :180mA / 2.2W (Max)

Operating Temperature: -10 C to +50 C / (Humidity) 30% to 80% RH


Should be good I think, or am I missing something here?

Could it be the scope? I noticed that the scopes ability to give a nice bright image in dust or dawn isn't that good at the 'higher' magnifications...

Hope to hear from you guys soon!

Jirka
Posts: 680
Joined: 04 Jun 2014, 15:31
Location: Rijnland (Holland), Sudetenland (Bohemia)

Re: Is it the boardcam, or the scope...

Post by Jirka » 15 Dec 2015, 11:22

Can you post some footage? The problem is most likely a low sensitivity of your camera, but it could also be other things. Two come to my mind right now:
- wrong focus match between the camera lens, scope's focus/parallax setting and ocular dioptric correction. Have you played around with these settings and their combinations? Does it work fine in daylight at the same distance?
- bad exposure set by your camera - have you tried different power levels of your illuminator? Does the ir light cone fully cover your field of view at that distance?

BTW: it is quite normal for zoom scopes to produce darker image at higher magnifications. In the daylight you usually do not notice and you only start to observe this when your eye's iris is fully open.

Daan
Posts: 7
Joined: 14 Dec 2015, 22:47
Location: Netherlands

Re: Is it the boardcam, or the scope...

Post by Daan » 15 Dec 2015, 11:36

Hi,

I perfectly adjusted the eyerelief for the camera, tried with the parallax also.

The Ir torch can only focus, there's just one powermode on or off.

I'll try to shoot some footage this evening and also post my current settings from the OSD.

Daan
Posts: 7
Joined: 14 Dec 2015, 22:47
Location: Netherlands

Re: Is it the boardcam, or the scope...

Post by Daan » 16 Dec 2015, 16:20

Yesterday the new 16mm lens came in. I did also reset the camera before I shot the video. Don't mind the fingerprints on the screen ;)

Houses are about 100yards away, when you hear the click I switched on the T20 uniquefire Ir torch and than focused it to achieve a better image.

https://youtu.be/7MQ7NMVJTi4

Daan
Posts: 7
Joined: 14 Dec 2015, 22:47
Location: Netherlands

Re: Is it the boardcam, or the scope...

Post by Daan » 20 Dec 2015, 23:55

:silent: someone an opinion?

Jirka
Posts: 680
Joined: 04 Jun 2014, 15:31
Location: Rijnland (Holland), Sudetenland (Bohemia)

Re: Is it the boardcam, or the scope...

Post by Jirka » 21 Dec 2015, 07:34

Well, it looks like the ir light cone only covers part of the area captured. That might lead to all kind of weird behavior if the camera is set to auto exposure. Were you using auto exposure or manual shutter setting.

But generally the level of detail is not too bad I would say - for a cheap Sony Camera.

Daan
Posts: 7
Joined: 14 Dec 2015, 22:47
Location: Netherlands

Re: Is it the boardcam, or the scope...

Post by Daan » 21 Dec 2015, 09:47

It was on auto.

Tonight I'll try it on manual with shutter on 1/50 and AGC on 30.00

Jirka
Posts: 680
Joined: 04 Jun 2014, 15:31
Location: Rijnland (Holland), Sudetenland (Bohemia)

Re: Is it the boardcam, or the scope...

Post by Jirka » 21 Dec 2015, 11:34

Also try to adjust the beam so that it covers the whole image evenly.

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MrNewbie
Posts: 298
Joined: 22 Dec 2012, 21:28
Location: Grafton, Ohio USA

Re: Is it the boardcam, or the scope...

Post by MrNewbie » 01 Jan 2016, 12:07

Daan wrote:It was on auto.

Tonight I'll try it on manual with shutter on 1/50 and AGC on 30.00

your missing the boat.. Try it on Manual with a FLD of 2 or 4.

Daan
Posts: 7
Joined: 14 Dec 2015, 22:47
Location: Netherlands

Re: Is it the boardcam, or the scope...

Post by Daan » 01 Jan 2016, 12:11

What's fld?

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