Which Security Camera Lens Size Should I Buy?

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  • Опубликовано: 28 июн 2024
  • ⚡⚡⚡⚡Amazon Links:⚡⚡⚡⚡
    25X Dome: amzn.to/2qiKkyQ
    Hikvision Bullet Cameras: amzn.to/32ydLAl
    💻💻💻💻💻 Blue Iris (Security Camera Video Management Software): hometechdiy.com/buy-blue-iris/
    Trigonometry to help figure out viewing angles: www.mathopenref.com/trigtange...
    Reolink’s lens choice guide: reolink.com/how-to-choose-bes...
    My Blog post for more information on lens sizes: hometechdiy.com/security-camer...
    Today’s topic is security camera lens sizes. I’ll show the difference between a wide angle 2.8mm lens all the way up to a 12mm zoom lens. In particular, I’ll review camera footage, the difference between fixed and variable lenses, the math behind lens sizes, zoom multipliers, sensor size impacts on viewing angles, minimal focus distances and lastly, we’ll check out if the lens size has an impact on the camera’s infrared night vision. All that should provide you with everything you need to know about security camera lens sizes.
    Fixed Camera Lens means the lenses don’t move. There no zooming in or out and no way to change their focus. Their fields of view or their coverage area is constant. Another name for these would be mono-focal cameras. I show a bunch of examples using a wide angle 2.8mm, 4mm, 6mm, all the way up to a zoom camera with a 12mm lens.
    I also show many examples with a Varifocal Camera. It has an internal lens which does move. Its zoom level and focus are controlled through its app and it’s called a varifocal camera.
    Showing many examples of nighttime footage in important to better understand the nighttime expectations for each lens size.
    These are bullet style cameras, and the lens principles apply to all types (domes and turrets). On the front of the camera, we have the lens, and its not meant to be removed or interchangeable. They are usually sealed and if you break that seal it’s very challenging to re-focus the camera.
    A camera’s lens size, is also referred to as the focal length. This is the distance between the back of the lens and the camera’s sensor, and it’s measured in millimeters. By comparison, there are 25.4mm in 1 inch, so when we talk about 2.8mm, we aren’t talking a very large space.
    Let’s chat about varifocal cameras a little more. As I change the distance between the lens and the sensor, you can see two things happening. 1) The field of view is becoming narrower and 2) the camera needs to re-focus to ensure a sharp image at the new focal length. This is an advantage to varifocal lenses over fixed lenses, as we’ll see shortly when we test the minimal focal distances.
    These can be a great option if you don’t know what lens size to buy or you will be moving the camera to various locations with different lens size requirements. These also work well if you want to zoom in on something within a short distance from the camera.
    When shopping for a varifocal camera, you may see them advertised as 4X zoom, or 10X zoom or 25X or whatever. This 25X zoom camera from Hikvision has a focal length from 4.8mm - 120mm. It’s called a 25X lens because 4.8 X 25 is 120mm. 4.8 is 1X and 120 is 25x. It’s another way of wording the camera’s optical abilities in a less tech savvy manner.
    There is another factor which can influence your viewing angle. The size of the sensor. I show some great examples here.
    When selecting a security camera, knowing the viewing angle is more important than knowing the lens size. For me, the lens size gives a ballpark figure of wide angle or zoom. The viewing angle is an actual measurement dictating your coverage.
    The exact viewing angle, gives you the exact coverage to expect.
    I show an example using triganomatry and how to calculate the viewing width given the camera's viewing angle.
    We do a minimal focal distance test on all the cameras and then check out how the IR lights’ hardware is impacted by the given lens size.
    Tonnes of information and I hope you learn a lot!
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Комментарии • 85

  • @craigsmestad6952
    @craigsmestad6952 2 года назад +2

    Great videos! I'm just getting in to security cameras for our home. I've learned so much from you regarding Blue Iris. Keep up the great work!

  • @shaylevy7213
    @shaylevy7213 3 года назад +2

    I was looking for this method of Lens sensors calculation for months,very informative information thanks for the hard work!!

  • @starmount326
    @starmount326 2 года назад +2

    Thank you, sir. you did an excellent job in explaining all the difficult terms and showing good examples.

  • @leonidbel2574
    @leonidbel2574 2 года назад +1

    Absolutely great, fluent and easy-to-understand explanation of the subject

  • @TheMemcon
    @TheMemcon 4 года назад +3

    Great video! Appreciate the technical breakdown.

  • @allynboyce7452
    @allynboyce7452 3 года назад +8

    This was an excellent, its apparent you did a lot of work to plan and make this video , and the result was informative and your presentation of the information was great! Thank you!

  • @sajeevcherian4060
    @sajeevcherian4060 3 года назад +3

    Pin point, crystal clear, much sought information. THANK YOU VERY MUCH

  • @miguelrosendo6134
    @miguelrosendo6134 3 года назад +2

    I want to thank for all the info. on the types of camera lens. You are very much appreciated. 👍 🙏

  • @beencraftn6612
    @beencraftn6612 Год назад

    I have watched countless RUclips videos and tutorials but THIS, by far, is the absolute BEST!! Thank you for this amazing video!!! Subscribed!

  • @nebulouz1
    @nebulouz1 3 года назад +2

    Thank you, very informative and you presented at a easy to follow pace.

  • @markh2754
    @markh2754 3 года назад +4

    As a security camera pro I understood most of what you presented in this video right away, but still gained some added perspective and knowledge. Your video is well worth watching for anyone interested in this subject. Well done!

  • @MrEye4get
    @MrEye4get 3 года назад +1

    Exceptionally well done! I learned so much watching. I am working with a security company who wanted to use the same [focal length] cameras for all locations. All they talk about is resolution, not field of view. I see now I need different cameras at different locations.

  • @ronnagar
    @ronnagar 3 года назад +1

    Excellent presentation and tutorial . Very interesting information and with detail description. Thanks

  • @moc143
    @moc143 Год назад

    Thank you for making these videos. They are very helpful.

  • @deadpixel4106
    @deadpixel4106 4 года назад +3

    Excellent explanation. Thank you for sharing

  • @burtonsatshop2061
    @burtonsatshop2061 2 года назад +1

    I'm excited to see this tutorial,thanks a lot

  • @MYTOYMAKERZ
    @MYTOYMAKERZ 4 года назад +1

    Thanks for the great information, Cheers

  • @rubberduck7228
    @rubberduck7228 2 года назад +1

    very informative... i learned so much...

  • @rickyantonio7688
    @rickyantonio7688 2 года назад +1

    Thank U So much for your time effort and exceptional knowledge powered by your demo...much appreciated...

  • @smfarhan2754
    @smfarhan2754 3 года назад +1

    A very Good Job Dear. Appreciative work. Thumbs up deserving video.

  • @search620
    @search620 4 года назад +1

    Very professional coverage

  • @sibongilevava7073
    @sibongilevava7073 3 года назад +1

    Thanks a lot for the info

  • @wasptt750
    @wasptt750 3 года назад +4

    Thank you. I watched lots of your videos and have learned so much. Excellent job well done.

  • @Sp-nd6uj
    @Sp-nd6uj 7 месяцев назад

    Excellent video!!

  • @ramadaneel8048
    @ramadaneel8048 Год назад

    Excellent tutorial.

  • @toddschwietz2483
    @toddschwietz2483 Год назад

    Excellent! thank you!!!

  • @peterdonson3928
    @peterdonson3928 Год назад

    Excellent, thank you.

  • @rossdestelleroe3016
    @rossdestelleroe3016 4 года назад

    Great Video, well explained and very informative. I have a question regarding how you record your monitor as seen in the GUI 4.0, what kind of a camera do you use ?

    • @HomeTechDIY
      @HomeTechDIY  4 года назад

      Glad you liked the video! I record my monitor using an HDMI video capture box that sits between the NVR and monitor. It's pretty cool. No lost frames and no lag. amzn.to/36kwQUe

  • @sto2779
    @sto2779 3 года назад +5

    9:50 - wow finally someone on youtube that actually knows a thing or two about security cameras, he seriously did some legitimate trigonometry calculations for finding the angle view. I wouldn't even trust security cameras with Wifi built in, anyone can hack that easily... just sayin.

  • @permichel8133
    @permichel8133 4 года назад

    Very Nice info 👍👍

  • @geomatrix5452
    @geomatrix5452 4 года назад

    Excellent introduction to the differences in types of security cameras. I know you did a lot of research to put this together. I've just installed 5 cameras. One 5mp PTZ with 12 X zoom, two 5mp with 4X zoom, a 4K fixed wide angle and another 5 mp PTZ for inside. I have certainly seen the differences with all up on my Blue Iris screen. Of course I get the most "fun" playing with the PTZ cameras.
    I like catching moon rises and sunsets with the PTZ. Not super sharp but pretty cool. What's been your best security camera experience for night sky viewing? Just wondering...

    • @HomeTechDIY
      @HomeTechDIY  4 года назад

      Glad you liked the video! I have tried PTZ at night a couple of times but struggled with the focus. Using the 25x PTZ from this video, I could preset the zoom level but the focus would not preset and the camera would continuously hunt for the right focus without success. That was a big letdown. But, in my review of the 12mm bullet from this Lens Size video, I pointed the camera towards the north star and captured stars and movement not visible to the naked eye. Definitely my fav! Here is that review (around the 10min mark if you want to jump ahead): ruclips.net/video/xjEPAd8Gy8Q/видео.html

  • @Yatana108
    @Yatana108 3 года назад

    Great video bro

  • @captainrick9379
    @captainrick9379 4 года назад +11

    Well, Nobody can say you didn't do your homework! Thanks for sharing!

    • @HomeTechDIY
      @HomeTechDIY  4 года назад +1

      Thanks for noticing... I bought those bullet cameras over a year ago just for this video.

  • @richardhogben3776
    @richardhogben3776 4 года назад

    Interesting, thank you

  • @kengeorge3003
    @kengeorge3003 4 года назад +1

    Very Good Work.
    Would you recommend one PTZ or four outdoor cameras, for general observation at a large compound home?

  • @Maximo10101
    @Maximo10101 3 года назад

    Great Video! Are you able to suggest at which distance you can clearly read the license plates with the 12mm camera (when using digital zoom) ?

    • @HomeTechDIY
      @HomeTechDIY  3 года назад +2

      Thanks! With this camera show here, once it gains focus at 32ft (9.75m), the digital zoom will also be clear.

  • @zobitv2883
    @zobitv2883 Год назад

    Good works nice video

  • @sheffin007
    @sheffin007 8 месяцев назад

    Thank you sir

  • @charlino69
    @charlino69 11 месяцев назад

    gracias, el mejor video al respecto.

  • @jogomez1988a
    @jogomez1988a 4 месяца назад

    Te agradezco mucho tu explicación. Me sirvio bastante. Una recomendación que te hago es de que sí profundices en las matematicas. Así queda más claro todos los conceptos que manejas.

  • @pa4friends
    @pa4friends 3 года назад +1

    Thank you very much for going into trigonometric :)
    I did it too for Hikvision models DS-2DE4A425IW-DE and DS-2DE4A225IW-DE, and by my calculations, the angles on their datasheets are correct.
    I did the same for these other two Hikvision models DS-2DE4A425IW-DE and DS-2DE4A225IW-DE, and in my opinion the agles are totally wrong.
    Anyone can confirm? :) Thank you.

  • @funkypotamus
    @funkypotamus 2 года назад

    Great video

  • @jinukjeong7573
    @jinukjeong7573 4 года назад

    thank you

  •  3 года назад

    Can blue iris control your PTZ cameras in the manner you want? I've read that its better to use a matching brand NVR for PTZ or LPR cameras. any thoughts? thanks

  • @dhanapandyk1226
    @dhanapandyk1226 2 года назад

    This video is great 👍

  • @mpcp27
    @mpcp27 4 года назад +1

    Nice video. Since you have a camera looking at your driveway to capture vehicle details, would be nice if you could do a video setting up your camera (i e adjusting image settings, fps) to capture plate details at night to overcome headlight bloom... Compare 2/3 Mp standard camera, 8mp etc.. and if it would be good/necessary to go to a more specialized camera with better night vision or a license plate reader.
    A little over a year ago i had a system installed, and had two dome varifocal 2mp cameras dedicated to road coverage at the front of the property (i e. Installed at the gate) so i can see what is on the street in front of my house. It covers both left and right sides so I get almost 180deg coverage of the road. I should have put in a better resolution cameras but didn't know enough at the time of installation.
    The front cameras have come in useful getting plates when there have been suspicious vehicles in the area. However i suffer the headlight bloom problem at night... Haven't had a chance as yet to tune the image settings to see if i can improve the license plate capture.

    • @HomeTechDIY
      @HomeTechDIY  4 года назад

      Thanks for the ideas!! Which cameras do you use?

    • @mpcp27
      @mpcp27 4 года назад +1

      @@HomeTechDIY .. It is the older analog stuff, not poe. The poe was too expensive in comparison. The cameras are a mixture of dome and turret cameras and different resolutions 2MP or 3 MP. After a couple of years i will look into upgrading to a higher resolution on some of the cameras. If you are asking about brand it is alibi - they look like the hikvision cameras... but the alibi system came with a 3 year warranty.

    • @HomeTechDIY
      @HomeTechDIY  4 года назад

      Awesome! Thanks for sharing!

  • @AbdoZaInsert
    @AbdoZaInsert 3 года назад

    Thanks Habibi !

  • @ethereumplayer1729
    @ethereumplayer1729 4 месяца назад

    That was an amazing tutorial, very helpful…I am about to buy 16 new Dome cameras for a property I could do with some extra guidance if your open to it.

    • @HomeTechDIY
      @HomeTechDIY  4 месяца назад

      Thanks for the kind feedback! 16 new cameras sounds exciting! Every situation and setup is different and I don't normally offer one on one services. If you want to drop me a line, I will provide some guidance if I feel comfortable doing so. info@hometechdiy.com

  • @MrRockydee07
    @MrRockydee07 3 года назад

    Like the 2.8 .

  • @Chavacano
    @Chavacano 4 года назад

    Hi Great channel. How do I change a Hikvision camera set Subnet Mask address to match my network Subnet Mask address because they are different...and I cant seem to find how to do this on the DeepInMind GUI..any idea?

    • @HomeTechDIY
      @HomeTechDIY  4 года назад

      Thanks!! If you uncheck "Enable DHCP", does that allow access to the Subnet Mask?

    • @Chavacano
      @Chavacano 4 года назад

      @@HomeTechDIY Hey thanks unfortunately its not that simple, even with the DeepInMind flagship GUI for the IDS series NVR and cameras. The camera I was trying to configure was actually registered by a previous owner.....hence it was an authenticated access to the camera configuration via HikConnect which I dont have access to - simply because it is not my account. So for those who purchase used cameras out there as a tip ensure you ask the previous owner to unregister the camera from any of their linked accounts. The get around is using the unbinding feature on HikConnect to resolve this problem. I would be very interested indeed for you to run some videos on how to setup VLAN for your CCTV system seen as you appear to have a Managed PoE switch. This would be very helpful for those who rely on switches for a more advanced and secure CCTV network setup.
      By the way your channel is very informative, keep up the good work. Thank you.

  • @benpinet8488
    @benpinet8488 4 года назад

    Can fellow Canadians chime in to recommend good online retailers for these systems?

  • @bluechair6661
    @bluechair6661 4 года назад

    Where could I contact you to ask some questions about a specific set up that I need?

    • @HomeTechDIY
      @HomeTechDIY  4 года назад

      My email is info@newfiebort.com

  • @dshack4689
    @dshack4689 3 года назад

    Good video. Just one thing - "be sure to check out this video here" there's no hyperlink on the card you point to...
    Cheers! =)

    • @HomeTechDIY
      @HomeTechDIY  3 года назад

      Thanks!! I just updated the video with the link. :)

  • @janessadaniel2286
    @janessadaniel2286 2 года назад

    I am from Lethbridge ab I need help with a security setup anyway we could chat thanks Jamie

  • @alonzosmith6189
    @alonzosmith6189 3 года назад

    Which camera lens can cover a 3 car garage? Thanking you in advance

    • @HomeTechDIY
      @HomeTechDIY  3 года назад

      What is the scene width and the distance between the camera and the scene?

    • @alonzosmith6189
      @alonzosmith6189 3 года назад

      @@HomeTechDIY this is link to the model house ruclips.net/video/Pl-7lFrRCuc/видео.html, thanking you in advance

  • @PBMS123
    @PBMS123 3 года назад

    Focal Length isn't measured from the back of the lens to the sensor. It's from the point of convergence to the sensor. The point of convergence is usually in the lens. For cameras with fixed mounts, the distance between the back of the lens and the sensor is the same regardless of what lens is there.

  • @AiBilly
    @AiBilly 2 года назад

    Whaaaa..All i want is a camera that when i look back at the recording say to the mailbox which is 100ft away, it shows me a clear face picture when i zoom in.. whaaaa lol.

  • @CMK-Security
    @CMK-Security 3 года назад

    Here's a expert question 🧐in Terms of Led night Vision camera coverage:
    Let's say you have Roof projections arround a House and Plan to mount Poe cameras underneath IT. So it would be 14.8 feet (4,5meter) above Ground.
    You want to see the animals causing Noise and leaving 💩arround your House. Basically you want to be able to tell If a wild animal, your neighbour 🥴 or a cat, Dog, hedge Hog etc is responsible.
    Backyard is completly dark at night. Therefore you want to invest in warm led cameras to get a good View.
    Just the backyard is 118feet (36meters) in horizontal length and 82feet (25meters) in vertical width.
    Remember: the camera would be 14.8 feet above Ground. Which Lens size would you pick 🤷 and will the Led from the camera even Cover the vertical area?

    • @HomeTechDIY
      @HomeTechDIY  3 года назад

      If I understand correctly, your scene width is 36m and it's 25m away from the camera install location which is also 4.5m high? If so, the viewing angle is roughly 72 degrees. To answer your second question, getting light that far will be a challenge. You will also need a pretty high resolution sensor to capture those details. You might want to consider 2 cameras side-by-side to help with the light and resolution.

    • @CMK-Security
      @CMK-Security 3 года назад

      @@HomeTechDIY Correct. Thx for the reply. Any suggestions about which Lens size? I Plan to buy some of the dahuas led cameras that Claim to illuminate 40m.

  • @Bigred-pz5hi
    @Bigred-pz5hi 4 года назад

    Are security cameras that addicting

    • @HomeTechDIY
      @HomeTechDIY  4 года назад

      Yes, once you start, you will never be able to quit. lol