 | Home > In Car Electronics > What reverse camera angle to simulate rear view mirror? |
 
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| RoadForce Member Since: 17 Jul 2014 Location: Holland Posts: 324   
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Ok so no one then?
Perhaps I should add that on my HCPU, the rear view mirror is often useless because the view is obstructed by the load in the tub. Defender 130 HCPU Td5 MY2000 |
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4th Feb 2017 1:03pm |
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| Mash Member Since: 09 Feb 2015 Location: Guernsey Posts: 1674  
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On my D3 I have a reverse cam built into one of the number plate lights, I couldn't tell you what angle it is however it does over lay a grid system over the image to allow you to get distances, might be worth asking different companies if this feature is included on their system. 90 wolf - Jasmin http://www.defender2.net/forum/topic39408.html
90 V8 - Maggie http://www.defender2.net/forum/topic42564.html 110 TD5 - Buggsy http://www.defender2.net/forum/topic59029.html 52HG25 lightweight https://www.defender2.net/forum/topic72342.html D3 Hse - Fiona Capri 2l S - Anna Think I might have a problem............ |
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4th Feb 2017 1:37pm |
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| mse Member Since: 06 Apr 2008 Location: UK Posts: 5024  
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I have a camera, all I can offer is no one angle is great on the defender. So think about the view that's useful. I went for close up around the rear eg for hitching etc...but it's not got the long range rear view Mike
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4th Feb 2017 8:35pm |
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| L110CDL Member Since: 31 Oct 2015 Location: Devon Posts: 10513 
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Same as MSE said and really good for parking as well
 1996 Golf Blue 300Tdi 110 Pick up. Keeper.
Clayton. |
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5th Feb 2017 11:12pm |
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| RoadForce Member Since: 17 Jul 2014 Location: Holland Posts: 324
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I don't care about close up, I am looking for something I can use to replace my RVM. Defender 130 HCPU Td5 MY2000
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6th Feb 2017 8:48am |
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| mse Member Since: 06 Apr 2008 Location: UK Posts: 5024
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Well you have answered your own question then
Incidentally from experience with a number of motorhomes, you probably want to keep you reversing mirror and i suggest you look there at the cameras on offer - i had a great sony one, to simulate the mirror, but im not sure i would fit that on the defender Mike |
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6th Feb 2017 9:45am |
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| RoadForce Member Since: 17 Jul 2014 Location: Holland Posts: 324
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Thanks, but no I didn't. The question is "what camera angle?". I know 120° is too wide, but is 90° ok, or should it be even less? There's plenty of cameras on ebay, but none in a shop in my area where I'd be able to try different angles. So, if I buy from eg ebay, what field of view angle should I get to avoid trial and error and having to send back items, with obvious cost and a waste of time... Defender 130 HCPU Td5 MY2000
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6th Feb 2017 10:59am |
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| mse Member Since: 06 Apr 2008 Location: UK Posts: 5024
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Camera viewing angle doesn't dictate depth
 and therefore how much rearward you will see. (i had a 120 or 170 as a sole rear look camera )
You wont get as good an image as a mirror regardless and there are some additional factors to consider like sun etc... So my first point still applies - think about what you want the image for. basically there are only 3 locations to install a camera - Rear roof area (back top or corner), number plate area or cross member area then consider you camera mounting angle and the type of camera, it will be a compromise. Consider the screen you will use. Thats all before the type of camera and screen When you get into it - you will see what i meant about considering what you want to see You could get something like this http://www.parkingcameras.com/store/produc...amp;page=1, great camera - in the cross member maybe - still 120 degrees but not without challenge when in use - which i could explain if you need? And your problem is why they invented this: http://www.parkingcameras.com/store/produc...amp;page=2 Mike |
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6th Feb 2017 2:22pm |
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| 4ndy Member Since: 04 Jun 2016 Location: Cheshire Posts: 17 |
I can't give a definite answer, as I've never applied the theory, but I do know that a 45mm lens on a full frame camera is roughly equal to a human eye's focal length (this is highly arguable however), and objects appear roughly the same size through the lens as they do in front you the person. However, this would limit your peripheral view too much.
Personally I would aim for a camera with a 100 degree field of vision as this should give you a good viewable area whilst maintaining scalability similar to a rearview mirror. HOWEVER, this is all back of a napkin theory, I really don't know how well this would work in real life! The image below gives a rough guide: https://www.samsungsv.com/Content/Images/D...20copy.jpg Not an owner... yet! |
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6th Feb 2017 2:58pm |
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| mse Member Since: 06 Apr 2008 Location: UK Posts: 5024
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the problem with these cameras start from their quality and end quickly into the screen quality - i personally wouldnt compare it anything like real camera lens
another point - they measure eitherside of the centreline istr so 90 is 45 each side - you probably want 60each side so 120 - depending on location Mike |
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6th Feb 2017 5:20pm |
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| 4ndy Member Since: 04 Jun 2016 Location: Cheshire Posts: 17 |
Completely agree, they're not similar in quality, but a focal length is a focal length
 Not an owner... yet! |
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6th Feb 2017 6:16pm |
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| mse Member Since: 06 Apr 2008 Location: UK Posts: 5024
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Yeah but its probably the least likely consideration of the Chinese manufacturer
 Mike |
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6th Feb 2017 8:09pm |
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| Peter Td4 Member Since: 23 Oct 2010 Location: Antwerp, Belgium Posts: 227  
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This is the type of camera you would need to install for the intended use:
https://www.dometic.com/en-gb/uk/products/...44-_-63798 
As mentioned by 4ndy, the +/- 45mm equivalent focal length is what you need to get a long range view behind the vehicle. Peter, Defender 110 StaWa - Td5 Defender 110 HCPU - Puma Defender 90 Soft Top - Td5 |
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6th Feb 2017 8:44pm |
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| MadTom Member Since: 10 Sep 2013 Location: Olomouc Posts: 576  
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For rear view mirror replacement you need different camera (angle and pointing) than for reversing.
For reversing you need to look down to the earth +-10cm behind the car. I have a rear looking camera on Disco2 - it works, but it is not perfect for mirror replacement nor for reversing. Future plan is to switch to 2 separate cameras - on for rear looking and one for reversing. 3,5" LCD placed over the standard mirror inside has switch for two cameras. "Drobek" = The Small One - Discovery 2, "BlufĂnek" = The Blue Thing - Defender 130, and for me at least Ford Mondeo |
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7th Feb 2017 8:09am |
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