Re: Camera Mirror Setup

[ABLE1 <someone@xxxxxxxxxxx>]

On 11/26/2017 8:50 PM, E D wrote:
 > Hi Les,
 >
 > The units that I used were TP-LINK AV2000 2-PORT gigabit pass-thru
Powerline starter kit. It uses the latest AV2 standard, allows 4k HD
streaming. It does claim up to 2000Mbps Powerline speed, about $90 or
so. MODEL # PA9020P KIT
 >

Interesting!!  I tried a Trendnet product a number of years ago to
transmit Ethernet in a old house.  It failed.................
Units are on my "pile" as I type.
Maybe TP-LINK got it right.

 > You mentioned that the light poles are all controlled by a photo-cell
and timer. Does that mean that each pole has its own photo-cell or are
they using one photo-cell for all the pole lights? Are the poles wired
one to another, or are they each home-run to a building box?
 >
All wiring for light poles returns to the Electrical Closet.  There is
one photocell that controls the pole lights through a relay that is
energized.  Not sure if there is a timer involved as well.  I originally
was looking at the project to use the poles thinking they had photocells
on each.  That was not to be once I talked to the electrician.

 > Sorry if I digress, but is anyone actually going to view this camera
at night? I do not see how you could ever possibly get any quality
picture out of this setup at night.
 >
I agree no nighttime viewing.  Doesn't make sense.

 > In regards to your questions about other issues I may foresee, I
think best to summarize it this way.
 >
 > ---The human eye can see up to 1000fps. The megapixel equivalent
numbers below refer to the spatial detail in an image that would be
required to show what the human eye could see when you view a scene. 90
degrees * 60 arc-minutes/degree * 1/0.3 * 90 * 60 * 1/0.3 = 324,000,000
pixels (324 megapixels). 120 * 120 * 60 * 60 / (0.3 * 0.3) = 576 megapixels.
 >
 > 1. You are reducing the natural pixel view of the roof scene with a
measurement of about 105' wide and with an angle of about 71 degrees
down to an area of the convex rectangular mirror which is 20" x 30" with
a viewing distance of 35 ft.
 >
 > 2. You are then using camera optics from 60' away to see that 4.2
square feet of view on the convex mirror and are re-amplifying digitally
for viewing to the dvr.
 >
 > 3. The mirror is not the quality that NASA uses, nor is it in the
vacuum of space. Meaning- spatial distortion highly probable, air
turbulence assured.
 >
 > It is kind of like a guy who is using 2 sets of binoculars taped end
to end, so that he first reduces the view and then re-enlarges it.
 >
That is a lot to digest, but I get it.

 > I think that the concept will loose a greater amount of definition
that is presently anticipated. But, since there is a 30-day money back
return on that mirror, I would get it and do this in a controlled
environment at home  or shop, and see what I would get as a view on the
dvr with the camera that you are envisioning to purchase. I definitely
would not be trying this out onsite first.
 >
I agree, but doubt that I will test it.  The above gives me reason for
concern that it will be difficult to get it right.


 > If I was the owner, and I had been stuck paying for one or more
liability claim/lawsuit, I would gladly pay to rewire that pole. The
wiring is probably in pipe anyway. So who designed this roof anyway?
Must have been some Florida contractor who relocated to your area.
 >
I agree on the Florida connection, maybe.  Since we call those that
transplant to Florida "Snowbirds" then this guy would be called a
"Sunshiner" or "Sandflea" of something else??

 > I'd love to see how it turns out for you.
 >
I will attempt to keep all in the loop.
Thanks for all the extra input.

Have a good week.

Les