DT MI
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- Joined
- Oct 10, 2014
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- 6,759
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- Location
- Michigan
- Country
- United States
- Dash Cam
- More than my wife thinks I need.
It's a commonly held view that the closer the lens to the windscreen, the lesser the screen reflection problem.
This doesn't correspond with my experience. My SGZC12RC lens is just a few mm from the windscreen, yet suffers more reflections than my Mobius B did when mounted to the rooflining, with the lens a cm or more from the windscreen.
For a long time there was a kind of myth circulating here on DCT that the closer a camera is to the windshield, the fewer problems one will have with reflections. That turns out not to be quite true and it depends a lot on the particular vehicle as well as the rake of the windscreen. From my experience with a steeply angled front windscreen it is best to have the camera farther away from the glass to minimize reflections and closer to the glass if it is flat and vertical such as the rear window of a pick-up truck. There will always be some reflections on the rear glass but I find that with my rear Mobius mounted as in the photo above I don't generally have any serious problems even if I do see a reflection from time to time depending on the angle of the sun.
When I first replaced my G1W-x with a SG9665GC I was expecting a reduction in reflections and was surprised to find just the opposite. Since I had both installed at the same time it was easy to see the difference without confusing the issue with different lighting, time of day, direction of the sun, etc. As a result I did a bit of playing using a P&S digital camera just to see how positioning it at various distances from the glass affected the reflections.
This is how I had the G1W-x and GC mounted:
This the view/reflection from the driver's eye:
This from the G1W position:
This from the SG9665GC:
And this with the camera right next to the glass:
No question that, at least in this case, the reflections got progressively worse the closer the camera was to the glass.
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