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Author Topic: EasyN model e/w IR Cut Filter?  (Read 13369 times)

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June 08, 2011, 12:27:52 pm
I noticed a new EasyN camera, model FS-613B-M166I, which claims to have a switchable IR cut filter that renders good daylight colors but automatically switches out at night for use with the IR light. I am wondering if the cut filter is actually mechanically switched, like an AXIS camera, or is this just some sort of software trick. Does anyone have one of these cameras that can advise on its true capabilities?

http://www.easynp.com/ShowProducts.asp?id=436

--UPDATE--
I contacted a seller of this camera and he states that the IR Cut filter is optical and is switched out mechanically. Wansview has a similar model. Also, a non-PTZ outdoor model by EasyN is being advertised that contains a cut filter.

Here is a mechanism for the waterproof camera that is being sold separately: http://goo.gl/Inw80
« Last Edit: June 08, 2011, 02:00:36 pm by celem »

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June 08, 2011, 02:01:37 pm
there has been a seller on ebay who offered a foscam like cam with exactly this feature. The description and picture suggested a mechanical device. It would be easy to implement, and could be coupled with the ir-leds.
OTOH it could prove to be impractical when mounting the cam upside down or tilted if it is a too simple solution (spring loaded or balanced slide in frame with electromagnetic actuation, etc).

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June 08, 2011, 02:07:09 pm
Look at the second link in my post. From the photos I cannot figure out how it works. It looks like it may slide a filter inside the rectangle?

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June 08, 2011, 04:15:05 pm
yes, that seems to be the same principle as in cam of the ebay auction.
some electromechanical device that slides the ir filter between the lens and the cam-chip.

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June 08, 2011, 04:48:24 pm
I have examined the install document at the second link in my post and the center two screw holes are mounted on standoffs while the other screw holes float in the air. Thus the entire rectangle is stationary and the filter must slide within, what appears to be, a rectangular box. Now I wonder if the filter slides via some polarity sensitive solenoid mechanism that (a) only requires power when changing position; (b) requires continuous power while shifted and has a spring return. Also, I wonder if the PTz camera's device is different since this device obviously would not fit within the dome head of a PTz camera

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June 09, 2011, 03:09:37 am
the retrofit device in your link has a housing that enables it to be handled by customers.
The device in the ebay auction was only "the guts" without housing.
I could not determin if it was like a "train semaphor" or like this "sliding window" design, but definitely it was a moving filter that was brought between cam-chip and lens.

There is a new type of this cam on ebay at the moment that has a similar device like in your link.
look for article# 280642872454  or "ali2 wireless webcam"

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June 09, 2011, 09:44:50 am
The Ali2 eBay post shows the ir-cut mechanism connected to a testing card (copy attached below). The shape is different from that of the outdoor camera - more of a square shape. It appears that the solenoid mechanism is at the bottom and the filter is attached above and slides horizontally. Too bad that all of the live demo links at ali2 and their eBay post are nonfunctional.

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June 09, 2011, 11:12:20 am
Recently I was considering 3M window film (http://goo.gl/kUJ5L) for my windows to block afternoon infrared heat from the sun. A salesman left me with a number of samples of various films. It dawned on me that I should try some of this film in front of a foscam F18909W camera that is on my porch. I cut out a little piece and taped it to the front of the lens. It does improve the color. green trees now look green instead of gray, but not in the image center. The filter is less effective than a purpose-built IR-cut filter, but it does work to some degree. See the screen capture below.

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June 09, 2011, 01:55:05 pm
Hi,

the link I tried today was working reasonably well, now the whole domain seems to be down ... china ::)

An other way to see how the picture would be with ir filter is buying a cheap replacement lens. I got a wide angle one from dx that (still) has it's ir filter and the colors are more lifelike. I have a second one from an old philips webcam that is more tele and also has good colors.

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June 09, 2011, 06:23:08 pm
I measured the inside lip of the rear of a 3.6mm M12x0.5 lens from dealextreme, and it measures 9.15mm with my micrometer. I found some ir-cut square filters that measure 7.75x7.25mm, so they will handily fit within that space. I purchased a couple of them. I'll glue the filter in with four drops of glue in the corners. My foscam F18909W on the porch is only for daytime use (the IR leds are pretty useless) and I'd rather have true color. I'll report back with my results. FYI - the site that sells these filters for $3 each is http://goo.gl/FUZSB

By the way, I found a Chinese site on alibaba where I can buy these for thirteen cents each but you have to buy a lot of 1,000 - $130 plus shipping. That's about 9,998 more than I need.

--UPDATE--
The IR cut-filters arrived today. Four little drops of glue on the lens bottom, screwed it in and voila - good colors - it worked! Now my trees look green with my foscam F18909W. The IR is no longer going to work at might but that is OK because the wimpy six IR led set didn't work very well anyway. See the attached photo with the nice green trees.
« Last Edit: June 15, 2011, 12:29:20 pm by celem »

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June 10, 2011, 06:24:47 pm
The wide angle lens with ir-cut filter cost ~5$ inc. shipping on dx ...
http://www.dealextreme.com/p/replacement-fixed-iris-lens-for-cctv-camera-1-8mm-47018

the only con are some dust particles inside the lens (that you don't see on the picture) ....
« Last Edit: June 10, 2011, 06:35:07 pm by schufti »

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June 10, 2011, 07:42:51 pm
Are you sure about that lens having a IR-cut filter? I purchased a set of six lenses from dealextreme (http://goo.gl/dqTvt), and they have no IR filtering (pass or cutoff). The user comment on that page says "...it worked well out of the box with the IR LED's on my camera..." which would indicate no IR-Cut filter. If there were an IR-cut filter then the IR LEDs would be useless.

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June 11, 2011, 03:05:51 am
Yes, I'm pretty sure because when I mounted it, colours at day looked much better (to my joy) but I couldn't see a damn thing at night ...

If you look at the bottom mots picture, you see the faint pink of the ir filter. And one of the comments specifically describes how to remove the filter.

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June 15, 2011, 12:31:35 pm
Read back my update to "Re: EasyN model e/w IR Cut Filter?" that shows the rsult of adding IR-Cut filters to my foscam in order to get good daytime color.

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June 16, 2011, 05:27:35 pm
I am quite pleased with the true colors provided by putting the ir-cut filter into my foscam camera. Look at the video at the link below and notice the nice green trees. The swing in the foreground and is painted green, as now can be seen by this camera. Oh, and that is me that is waving to the camera. Watch: http://goo.gl/IYtzO