Left hand mirror.

[nicholsong]

Let us go back to Keith's(OP) requirement of viewing oncoming traffic when joinng a road at an angle (not 90 degrees)

I can see how a Fresnel lense covers a blind spot near the vehicle, but I cannot see how it helps to look 200m down the inside lane of a M/way or dual carriageway to view approaching traffic doing 60mph, which is what one needs to do before joining the lane.

Geoff

 

[KeefieWeefie]

This was at a roundabout so doesn't do it justice but give you an idea. Need to fit them with the top on the side facing forward as they are designed to look down behind a car.
View attachment 361363

Excellent thank you!

 

[Lenny HB]

Let us go back to Keith's(OP) requirement of viewing oncoming traffic when joinng a road at an angle (not 90 degrees)

I can see how a Fresnel lense covers a blind spot near the vehicle, but I cannot see how it helps to look 200m down the inside lane of a M/way or dual carriageway to view approaching traffic doing 60mph, which is what one needs to do before joining the lane.

Geoff

But that's not a problem as would be able to see in your mirrors.

 

[berni109]

how about this then?
https://rover.ebay.com/rover/1/710-...0001&campid=5338547443&icep_item=400962840639

 

[autorouter]

I don't want to panic or frighten anyone but there was an article some years ago where a fresnel lens had set fire to a van, dunno if it's true.

There are two types of lenses: converging and diverging.

Converging lenses can concentrate sunlight to cause fires. They are used in overhead slide projectors and devices where an image needs to be projected on a screen.

Diverging lenses will weaken sunlight not concentrate it. They are used for viewing a non-inverted image, diminished in magnification, like those stuck on van and motorhome windows. There is absolutely no fire danger from diverging lenses.

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[nicholsong]

But that's not a problem as would be able to see in your mirrors.

Not if you are at a 45 degree angle to the traffic and want some warning before you pull onto the maybe short slip lane.

I know exactly what the problem is that Keith is talking about, if some of you do not.

For Berni 109

Keith has already posted that he has tried those small stick-on ones and found them useless and I posted the same. They might be OK for the mirror closer to the driver's eye but not for one nearly 2 metres away, which is the one needed for a RHD MH joining traffic on the Continent, which was Keith's original problem.

I still believe proper parabolic mirrors are the answer.

Geoff

 

[KeefieWeefie]

Not if you are at a 45 degree angle to the traffic and want some warning before you pull onto the maybe short slip lane.

I know exactly what the problem is that Keith is talking about, if some of you do not.

For Berni 109

Keith has already posted that he has tried those small stick-on ones and found them useless and I posted the same. They might be OK for the mirror closer to the driver's eye but not for one nearly 2 metres away, which is the one needed for a RHD MH joining traffic on the Continent, which was Keith's original problem.

I still believe proper parabolic mirrors are the answer.

Geoff

Cheers geoff, do you mount the parabolic mirror on the dash by the passenger door or onto the top of the mirror?

 

[berni109]

autorouter but the one i posted a link to is 5" x 3" in old money so not exactly a small stick-on one.
i dont have one so cant comment on the durability of the adhesive at motorway speeds so something of that size the first time u get to 70 on the motorway u might have wasted u'r £5.

 

[Wombles]

autorouter but the one i posted a link to is 5" x 3" in old money so not exactly a small stick-on one.
i dont have one so cant comment on the durability of the adhesive at motorway speeds so something of that size the first time u get to 70 on the motorway u might have wasted u'r £5.

The ones we have are fitted to the inside of the window so speed not an issue!

 

[42208]

This one is awful and when leaving the Brugge aire I have started going the long way around, will try the mirror solution to the OPs question
51.197015 / 3.224063

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[tacr2man]

Having operated a LHD 12mtr US RV in UK , its not always possible to get at 90deg or near it on some junctions esp on small road . Normally I could use the window behind the front o/s door by the co pilot seat . When solo and no view I had fitted a rear facing camera at an angle on o/s to look back down the road , the monitor for rev camera had four inputs , so just selected the one to get whichever view was needed , I also fitted a forward facing camera on o/s so could see to pull out round parked large vehicles.

 

[nicholsong]

Cheers geoff, do you mount the parabolic mirror on the dash by the passenger door or onto the top of the mirror?

As I described above I mounted mine on the top of the normal mirror as I found a Merc one which exactly fitted the contour. You could mount it under the mirror depending on type of mirror.

Geoff

 

[martin2603]

There are several cameras available now for this problem. My Auto Leccy fitted them to his, mounting on the mirror, Having said that I had a LHD 40ton drawbar some years ago which I drove all round the M25 Area for 2 years before I re chassis it for a RHD DAF. In that time I only touched 1 door mirror on an overtaking Audi . No cameras in those days ! We also fitted the Fresnel lenses to our trucks , they do improve n/ s visibility and a very cheap option

 

[KeefieWeefie]

There are several cameras available now for this problem. My Auto Leccy fitted them to his, mounting on the mirror, Having said that I had a LHD 40ton drawbar some years ago which I drove all round the M25 Area for 2 years before I re chassis it for a RHD DAF. In that time I only touched 1 door mirror on an overtaking Audi . No cameras in those days ! We also fitted the Fresnel lenses to our trucks , they do improve n/ s visibility and a very cheap option

Excellent advice cheers!

 

[peterc10]

This was at a roundabout so doesn't do it justice but give you an idea. Need to fit them with the top on the side facing forward as they are designed to look down behind a car.
View attachment 361363

Lenny, is that fitted on the inside of the window or the outside?

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[Lenny HB]

Lenny, is that fitted on the inside of the window or the outside?

Inside, just held on with surface tension, wet it and put it on so easy to move.