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Topic # 245196 23-Jan-2019 11:55
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Hey all,

 

 

 

Looking to find the field of view or angle of view for an IP Camera, We want to mount it on the eve of a house and have the camera able to see a slither down each wall. Like the below artists impression.


Is that possible? Was looking at https://www.viewtech.co.nz/dahua-2mp-25x-starlight-ptz

 

 

 

Cheers





 


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  Reply # 2166141 23-Jan-2019 12:13
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Yes its possible. I suggest installing the Dahua Toolbox on Windows and in the toolbox, there is an app called FOV Calculator.
Input the relevant parameters and you'll have a visual view of FOV.

 

Screenshot showing this - https://drive.google.com/file/d/1tE8HGOuKKB0az7yC1E3CUFTspaK1rcgr/view?usp=sharing


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  Reply # 2166147 23-Jan-2019 12:21
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I would personally avoid Dahua and go Hikvision.  Whilst they are very similar product lines, it's not necessarily the IP camera itself it's 1. how locked down / proprietory they are 2. the recommended NVR that can be sold with them and it's features that you get and 3. the cameras software and it's flexibility (or lack of).  That web interface for the Dahua is a total dog.  I got rid of that myself and changed to Hikvision and am very happy with it.

 

I'd recommend something like Hikvision DS-2CD2342WD.  I have 4 x of these, and they work mint.  You won't quite get the full 90 degrees with this particular model, but I'll PM you a screenshot of my swimming pool area shortly to show you how close you'll get.

 

 


 
 
 
 




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  Reply # 2166172 23-Jan-2019 12:57
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chimera:

 

I would personally avoid Dahua and go Hikvision.  Whilst they are very similar product lines, it's not necessarily the IP camera itself it's 1. how locked down / proprietory they are 2. the recommended NVR that can be sold with them and it's features that you get and 3. the cameras software and it's flexibility (or lack of).  That web interface for the Dahua is a total dog.  I got rid of that myself and changed to Hikvision and am very happy with it.

 

I'd recommend something like Hikvision DS-2CD2342WD.  I have 4 x of these, and they work mint.  You won't quite get the full 90 degrees with this particular model, but I'll PM you a screenshot of my swimming pool area shortly to show you how close you'll get.

 

 

 

 

Thanks for the info, We need something PTZ and the starlight range fits in very well and is available locally at a good rate.
The wholesalers for HikVision are useless, won't come back to me or provide a catalog with stock info or anything. It also appears the range is much more limited in the PTZ category. 





 


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  Reply # 2166177 23-Jan-2019 13:04
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chimera:

 

I would personally avoid Dahua and go Hikvision.  Whilst they are very similar product lines, it's not necessarily the IP camera itself it's 1. how locked down / proprietory they are 2. the recommended NVR that can be sold with them and it's features that you get and 3. the cameras software and it's flexibility (or lack of).  That web interface for the Dahua is a total dog.  I got rid of that myself and changed to Hikvision and am very happy with it.

 

I'd recommend something like Hikvision DS-2CD2342WD.  I have 4 x of these, and they work mint.  You won't quite get the full 90 degrees with this particular model, but I'll PM you a screenshot of my swimming pool area shortly to show you how close you'll get.

 

 

 

 

 

 

Hi, who did you purchase these from? Anywhere local or Amazon? thanks


neb

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  Reply # 2166281 23-Jan-2019 14:12
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Coil:

Looking to find the field of view or angle of view for an IP Camera, We want to mount it on the eve of a house and have the camera able to see a slither down each wall.

 

 

This sounds a bit like hunting rabbits with cruise missiles. Given the cost of the PTZ Dahuas, and the complexity of dealing with two completely different fields of view, wouldn't it make more sense to install two fixed cameras?

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  Reply # 2166320 23-Jan-2019 14:41
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Call IT Plus for Hikvision gear.

Waaaaay better to deal with than Atlas and will have a good chat about which model to use.

They have HiLook which is the budget brand Hikvisoon stuff - exactly same software and apps work with it. They have a dome ptz for around $250-odd.

Edit: just to add... IT Plus' gear is all legitimate English firmware, so you can update from official firmware etc.

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  Reply # 2166347 23-Jan-2019 15:32
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Lostja:

 

chimera:

 

I would personally avoid Dahua and go Hikvision.  Whilst they are very similar product lines, it's not necessarily the IP camera itself it's 1. how locked down / proprietory they are 2. the recommended NVR that can be sold with them and it's features that you get and 3. the cameras software and it's flexibility (or lack of).  That web interface for the Dahua is a total dog.  I got rid of that myself and changed to Hikvision and am very happy with it.

 

I'd recommend something like Hikvision DS-2CD2342WD.  I have 4 x of these, and they work mint.  You won't quite get the full 90 degrees with this particular model, but I'll PM you a screenshot of my swimming pool area shortly to show you how close you'll get.

 

 

 

 

 

 

Hi, who did you purchase these from? Anywhere local or Amazon? thanks

 

 

Hikvision do very good PTZ range too.

 

I bought direct from supplier DSD Technology in China, bulk buy with 6 other guys from work, including 4 channel NVRs.  Even after paying import duties and GST, it was still substantially cheaper.

 

http://dsdsecurity.en.alibaba.com/

 

Cheers


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  Reply # 2166393 23-Jan-2019 16:57
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Why do you want a 25x PTZ there?!

 

Simple answer is no - you can't get a 90 degree field of view on one of those cameras because they're 4.8mm minimum.

 

 

 

 


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  Reply # 2166497 23-Jan-2019 20:28
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Hi their. Why not a wall mount or ceiling mount fish eye or 360 degree camera. Also Axis do really good cameras for this but they're pricey and you'd have to go through a wholesaler but can be done.

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  Reply # 2166509 23-Jan-2019 20:42
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Also the field of view calculations for lenses tend to give the circlular field, which on a rectangular sensor will at best be the angle across the diagaonal of the image, but in practice you usually get less than that out of the lens, so a 90degree lens will not let you see both sides of a right angle like you are trying.





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  Reply # 2166511 23-Jan-2019 20:50
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Hikvision are also a bit slow to plug security holes. I'm sure you can google it. Amazed @sbiddle didn't mention it :D


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  Reply # 2166514 23-Jan-2019 21:03
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blakamin:

 

Hikvision are also a bit slow to plug security holes. I'm sure you can google it. Amazed @sbiddle didn't mention it :D

 

 

Well Hikvision and Dahua have both had plenty of security holes.. Having said that I'd opt for Dahua over Hikvision any day.


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  Reply # 2166538 23-Jan-2019 21:51
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Only if you are exposing your cameras to the net. Personally I have no ports open inbound to my NVR, I run SSL VPN on my iPhone back to my firewall then run iPhone app to view cameras remote. Don’t trust any IP camera software by any vendors to be fair, very easy to hack cameras on the net.



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  Reply # 2166673 24-Jan-2019 08:31
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sbiddle:

 

Why do you want a 25x PTZ there?!

 

Simple answer is no - you can't get a 90 degree field of view on one of those cameras because they're 4.8mm minimum.

 

 

The customer wants to be able to see things coming up a right of way in detail and have the camera able to track it.

 

chimera: Only if you are exposing your cameras to the net. Personally I have no ports open inbound to my NVR, I run SSL VPN on my iPhone back to my firewall then run iPhone app to view cameras remote. Don’t trust any IP camera software by any vendors to be fair, very easy to hack cameras on the net.


This is a concern, all the camera vendors have had their fair share of issues. I recall a few years ago wen I accidentally exposed RDP to the web on a fresh server I just deployed... Yeah that went well...

 

The customer is ex police etc and you can see where this is going.. 





 


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  Reply # 2166693 24-Jan-2019 09:16
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Coil:

 

The customer wants to be able to see things coming up a right of way in detail and have the camera able to track it.

 

chimera: Only if you are exposing your cameras to the net. Personally I have no ports open inbound to my NVR, I run SSL VPN on my iPhone back to my firewall then run iPhone app to view cameras remote. Don’t trust any IP camera software by any vendors to be fair, very easy to hack cameras on the net.


This is a concern, all the camera vendors have had their fair share of issues. I recall a few years ago wen I accidentally exposed RDP to the web on a fresh server I just deployed... Yeah that went well...

 

The customer is ex police etc and you can see where this is going.. 

 

 

Explain to him the risks, give him the options (Firewall with SSL VPN client personally I used Fortigate, or his existing NAT router with PAT) and let him make the call.

 

That way the onus is on him - it all really boils down to a cost thing, either do it properly (more $$), or do it half-arsed (less $$) but risk being hacked and the world watching you walk butt naked down your hallway

 

 


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