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Old 12-15-2011, 09:02 PM   #721
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never understood F-Stop and shutter speed myself. Maybe it was just 'over our heads' Steve......lol
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Old 12-15-2011, 09:21 PM   #722
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Till everone more about F-Stop and Shutter speed??
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Old 12-16-2011, 12:39 AM   #723
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This always puzzled me as well, but I'll take a shot at explaining it.

Try to think of letting light into a camera to create an image or film exposure as you would think of opening a window to let some air into a room.

Shutter speed = how quickly did you open and then slam closed the window? If, say there was a strong wind blowing (think of air as light), then you got all the ventilation you needed pretty quickly.

F-stop = how far open did you actually swing out the window to get the amount of ventilation you needed? Wide open, or only partially open?

You can see that that getting a desired result would be a combination of these two factors. Hope that helps.
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Old 12-16-2011, 12:45 AM   #724
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Originally Posted by crazeevw View Post
Charly, which Truck Supply Store?
Thanks, Derek
Derek,

I got them at a local store called East Coast Truck, but it's not be a national chain.
Just google "led truck marker light" and you should come up with the same thing. A decent Truck Stop would probably have them.

Charly.
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Old 12-16-2011, 01:04 AM   #725
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Key,

Maybe just a tad bit "Nutty professor-ish".

But as I've said before, I think of you as more of a Mad Scientist!

And furthermore, I'm not surprised that you speak more Italian that the rest of us either. I refrained from commenting on your language proficiency in a different thread for fear that my remark might have been misconstrued my the gentleman that just took delivery of his moho overseas.

Ciao,

Charly.
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Old 12-16-2011, 04:22 AM   #726
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That was great Charly!

I am no expert and was looking for an laymans explaination of the F-Stop thing.... and found nothing more than more silly stuff to put in my brimming head!

Did you know that:
"In optics, the f-number (sometimes called focal ratio, f-ratio, f-stop, or relative aperture[1]) of an optical system expresses the diameter of the entrance pupil in terms of the focal length of the lens; in simpler terms, the f-number is the focal length divided by the "effective" aperture diameter. It is a dimensionless number that is a quantitative measure of lens speed, an important concept in photography."



Now, one thing that I did find that is interesting....

"Increasing f-numbers, in one-stop increments; each aperture has half the light gathering area of the previous one."

Now....
In one of my tests, with the 5W tail lamp lit, the stock bulb and unpainted can read F2.8, and the Chrome painted + LED was F4.0, with the same shutter speed...
If, based on the diagram and statement above from Wikipedia, the "light Gathering area" of F4 is half of F2.8... I guess that means that the LED + Chrome Can is Twice as bright!


As for my somewhat rusty Italian...
I lived in Torino for nearly 5 years, and then again in Tuscany, working for Piaggio for 2 years on and off.... Still wish I had bought a Scooter...
I like to say I speak a lot of Italian... BADLY!

Ma, che credo... sono un poccino pazzo!
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Old 12-16-2011, 10:15 AM   #727
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That was great Charly!

As for my somewhat rusty Italian...
I lived in Torino for nearly 5 years, and then again in Tuscany, working for Piaggio for 2 years on and off.... Still wish I had bought a Scooter...
I like to say I speak a lot of Italian... BADLY!

Ma, che credo... sono un poccino pazzo!
First Lucas "Lord of Darkness" and now Marelli, his evil Italian cousin, I'm starting to understand your Airstream affinity.

Bill
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Old 12-16-2011, 11:32 AM   #728
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Koll
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Old 12-16-2011, 03:37 PM   #729
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First Lucas "Lord of Darkness" and now Marelli, his evil Italian cousin, I'm starting to understand your Airstream affinity.

Bill
Bill,

I'd say you've pretty much summed it up in a nutshell.


Charly.
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Old 12-16-2011, 03:53 PM   #730
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You only have to click on the project links in my signiture to understand how real my problem is!
Oh, and my Girlfriend has a Range Rover.... which is currently broken... again...
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Old 12-16-2011, 04:22 PM   #731
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Key,

I'm modifying my picture of you as a "mad scientist". Now I see you as kind of a cross between Wally Byam, Thomas Edison, and Hannibal Lecter.

Also, I'm not sure I can carry the "open window" metaphor far enough to cover your last installment of the f-stop/LED taillight thesis (although I'm thinking about it). For the moment, you're on your own with that one.

Condolences on the Range Rover, but you know you're flying in the face of inevitability with that battle.

Charly.
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Old 12-17-2011, 11:53 AM   #732
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You only have to click on the project links in my signiture to understand how real my problem is!
Oh, and my Girlfriend has a Range Rover.... which is currently broken... again...
Steve,

Anytime you fell as though you have bitten off too much, just bop over to this thread...it curled my toes, and not in a good way. I might have tackled it at 50 (I had a 3 year old then), but at 65...I just want to relax more.

http://www.airforums.com/forums/f36/...any-79254.html

More Dr Frankenstein than Hannibal Lechter

Bill
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Old 12-17-2011, 04:31 PM   #733
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Yup, I was following his progress... he is the guy who got me into the vented pads for buffing.
Scary project, but good!

Have been crazy busy with other time sensitive stuff, so not been able to get back at it this week.
This morning I walked over with the GF and dogs, and we spent time looking at, and deciding on issues of storage, TV placement, carpet, wood flooring, etc.
The TV plan looks good!
The Larger LCD on the bracket looks like it will really work well!
It was good and whilst she does not come over that much, she is very pleased with the progress and how I visualized everything, and is in agreement on 99% of what is planned.
We walked away very excited for 2012, and talked about it for maybe the whole 10 miles walk!

I just posted my "Mad Scientist" tail lamp project over in the Trailer section for fun.. lets see what they say!

I was sitting reading thru my ECT2000 manual and found out something REALLY AWESOME it can do!

Find battery drains!

By disconnecting the + side of a Battery and attaching the Transmitter, you inject the Tone signal into the wires... You can then trace where the tone is going... thru wires, fuses and find the circuit/item that is consuming power!

Sounds easy in theory!
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Old 12-17-2011, 04:57 PM   #734
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Camping World has a TV mount with a latch on it...but they want much more than the one you found...
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Old 12-17-2011, 05:00 PM   #735
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Yes, I am sure they do want more, and maybe its worth it.
Need to weigh my TV... give me a few mins...
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Old 12-17-2011, 05:05 PM   #736
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I like the thing on battery drain. I'm going to try it next week.
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Old 12-17-2011, 05:10 PM   #737
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Condolences on the Range Rover, but you know you're flying in the face of inevitability with that battle
I've had two Jags (XK-150 & XK-E) , a Land Rover 109 and numerous Rover Sedans: I feel your pain, though, I thought they went to Bosch electrics, or was that just masking the darkness?
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Old 12-17-2011, 08:30 PM   #738
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Its ok Mike..
I am tough, and will endure!
This range issue is not electronic...
Leaking Airbag I think..
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Old 12-17-2011, 09:09 PM   #739
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Lucas Industries plc

and for those of us old enough to have enjoyed {??} British sports cars and motorcycles of the 50's, 60's, and 70's -

"
The Original Anti-Theft Device - Lucas Electrics."

"Back in the 70's, Lucas decided to diversify its product line and began manufacturing vacuum cleaners. It was the only product they offered which did not suck."

"A Land Rover doesnt leak oil, it marks its territory."

Q - Why do the British drink their beer warm?
A - They have Lucas refrigerators....


da dump! ymmv.
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Old 12-17-2011, 10:37 PM   #740
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Oh, ok.. you wanna start?
LOL...

Anyone know what V8 engine the Range Rover, MG, and Triumph had in it for years?
Yep, a Buick V8...

Know who came up with the design and winning prototype for that American Icon... The Jeep?
Yep, the Austin Car Company...

I heard 70% of all Harley Davidsons manufactured are still on the road... The other 30%, the owners gave up and called AAA..

What Americans call Football is a game you play 99% of the time with carrying the ball with your hands... and if you kick it with your foot and score... you get less points..
Yet you insist on calling it a sport... where one of the more famous players was called the Refridgerator...
A game where the players have to wear padding, and have a rest every few minutes so that the commercials can play...

Now, I know a few American Football players who tried Rugby.. and gave up cos its too rough and atheletic...

Basketball?
Oh, please... thats a girls game where i grew up, called Netball.
And to make it difficult for the ladies, you cant move when you have the ball in your hands, and also we removed the backboard, so be accurate with your throws please ladies...

Baseball?
Oh, men mostly dont play that in England... its a Ladies game... and we call it Rounders... again, to make it tricky for them, we make the bat short and they are only allowed to hold it with one hand to hit the ball...


Now, who started this?
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