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Camera lens change and no pictures ever stored

Schmark

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All,

Two questions on two very different subjects.

Lens change: I have searched this forum and found many threads about this subject but I cannot find a final statement about whether or not a new lens should incorporate an IR filter. Should it or should it not?
My thought is that having an IR filter in the new lens may block the wavelength produced by the camera's IR emitter and defeat the purpose of seeing an illuminated scene at night. Thoughts?

Lack of pictures stored: I have a 2CD2335FWD-I with a micro-SD card configured for 80% record and 20% pictures (see first image below - though not sure why "free size for pictures" is 0.00GB). Further, I also have event (basic and smart) linkage setup for "Upload to FTP/Memory Card. Yet in the picture screen (see second image below), I never get any picture stored even though smart events **are** recorded on the micro-SD card. Any idea what I am missing?

Thanks

-S
Storage Management snapshot.JPG Picture snapshot.JPG
 
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alastairstevenson

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whether or not a new lens should incorporate an IR filter. Should it or should it not?
It does depend on the model of camera / the type of lens fitted.
These days with day/night cameras you'd expect there to be an IR cut facility, therefore there should be no IR filter in the lens.

Yet in the picture screen (see second image below), I never get any picture stored
Have you tried searching for 'All' instead of 'Continuous' for Picture?
I'd speculate it's full, but from picture sources other than what you are looking for.
 

Schmark

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Thanks Alastair.
It does depend on the model of camera / the type of lens fitted.
These days with day/night cameras you'd expect there to be an IR cut facility, therefore there should be no IR filter in the lens.
The cameras are DS-2CD2332-I and I have no idea whether or not they have 1/ a built-in IR filter and 2/ if they do, if the filter is separate from the lens, presumably located between the lens and the detector. The camera data sheet certainly does not mention any IR filter. If they do have an IR cut filter, it makes sense to order lenses without IR built-in.

Have you tried searching for 'All' instead of 'Continuous' for Picture?
I'd speculate it's full, but from picture sources other than what you are looking for.
As you can see from the screen shot below, there is no "all" option in the roll-down menu. What I find strange is the "Free Size for Picture" field shows 0.00GB meaning there is no space left for picture storage. Yet the capacity for picture storage is 23.5GB with **no** picture (apparently) stored ...

-S
Picture snapshot with roll-down menu.jpg
 

TheDank

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Hi @Schmark a quick web search for the camera model you mentioned comes up with the data sheet for it: https://us.hikvision.com/sites/default/files/vp_ds-2cd2335fwd-i_032619na.pdf

In the "Camera" section it shows Day and Night: IR Cut Filter.

So you should get a lens that does NOT have an IR filter, since the camera has an automatic IR Cut Filter that is separate from the lens. It sits in a little module between the lens and the sensor.

BTW did you find a good lens to swap into it?
 

Schmark

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Thanks TheDank. I was aware of the IR cut filter in the 2CD2335FWD-I. My question was: is there such a filter on the 2CD2332-I ? The 2332 data sheet does not even mention it: https://us.hikvision.com/sites/default/files/vs_ds-2cd2332-i_121117na_0.pdf

As far as lens replacements, there are plenty out there and I have not made my choice yet. I'm looking at M12, 4mm or 6mm focal length, around F/2.0, and rated at least 4K (~4 MP) to make sure I don't lose any resolution on the 2332 which is a 3 MP camera. Since they are relatively inexpensive (less than $10), I may get one with the IR filter and one without and test them.

-S
 

TheDank

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Ahhhh, sorry about that Schmark. I see now the 2335 you mentioned was for your other question and your IRC filter question is re 2332's.

Anyways... I guess this doesn't *definitively* answer your question, since it's not accurately and explicitly stated on the 2332's data sheet, but -- you can rest assured that the 2332 also has an IR Cut filter in an automatic module between the lens and sensor that moves the filter in/out of the light path.

Reason 1: it mentions the EXIR Illuminator up to 30M range. Any modern "real" camera that uses IR for day/night will have an automatic IRC filter. It has to use a filter in the day time for accurate color. It has to *not* use the filter at night in order to see IR.
Reason 2: The data sheet mentions an "ICR" for Day/Night. I bet that's just a typo for "IRC" (IR Cut) by a bad translator.

I've played with M12 lenses also. It's amazing how good the image quality can be in such an inexpensive lens! Have fun.
 

pozzello

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yes, 2332 can take a basic lens swap. I have put up to 16mm lens into the hik turrets. as Allastair describes, the IR cut is a separate component that the lens mounts to.
 

Schmark

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Thanks Pozzello. Are you saying the 2332 should take a replacement lens **without** IR filtering?
I also understand from Alastair that the separate IR cut includes a mechanism that moves it in/out of the way dependent of night/day environment

Back to my other question about not seeing ANY picture stored on the microSD card: if anyone else has pictures stored onboard their camera, please share your storage/event settings?

-S
 

Schmark

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Pozzello: the link you gave is for a M12 lens rated at 1 MP which I believe is not sufficient for a 3 MP camera. It also states "IR Board" ; does that mean it is made to mount on an IRC board and therefore it does NOT have IR filtering built-in?

I'm thinking of these lenses, 6 mm focal length, all rated in the 5 MP range:
https://www.amazon.com/FidgetFidget-Fixed-Board-Security-Camera/dp/B07FMV8K91/ref=sr_1_12?keywords=M12+6mm+lens&qid=1557423553&s=electronics&sr=1-12
https://www.amazon.com/Homyl-Fixed-Security-Cameras-Universal/dp/B07FDTDDPS/ref=sr_1_18?keywords=M12+6mm+lens&qid=1557423818&s=electronics&sr=1-18
https://www.amazon.com/Portable-Relative-Aperture-70°Angle-Protection/dp/B07R2HBQ2V/ref=sr_1_20?keywords=M12+6mm+lens&qid=1557423818&s=electronics&sr=1-20
 
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