More truth about UV/Protection filters. A comparison challenge. Step up

[usayit]

LightSpeed, I told you we were the minority... didn't I?

 

[Ron Evers]

pgriz, have we met? You certainly carried the experiment farther than I would have for this forum but you are certainly on the mark.

 

[pgriz]

Only on the internet, Ron. However, my testing approach is influenced by the testing protocols I used to set up as part of some science experiments, and also by the testing I used to supervise as a director of QC and QA for a large multinational. Rigorous testing is not easy to do, but when well done, it is extremely illuminating. The difficulty is in identifying and then controlling the variables.

 

[LightSpeed]

I realize that this isn't the optimum test for the situation but thought it might be close enough and give a rough idea of the path beaten.

Below you'll find something that was edited out of image number 1. See the little white specs? I forget what you call that, but it appears to have come from the light source. In this case a flash. They are roughly 2 inches from the bottom of the image and 4 inches from the left side. ( left to right).

 

[Josh66]

Below you'll find something that was edited out of image number 1.

...Editing things out should certainly be a no-no for a test like this.

I do see it, but I'm not convinced that it is from the light/UV filter combo (and I'm one of the ones expecting that to happen)... Can you reproduce it?

If it's reproducible, then I would say it is from the filter.

 

[Ron Evers]

Only on the internet, Ron. However, my testing approach is influenced by the testing protocols I used to set up as part of some science experiments, and also by the testing I used to supervise as a director of QC and QA for a large multinational. Rigorous testing is not easy to do, but when well done, it is extremely illuminating. The difficulty is in identifying and then controlling the variables.

I see we are brothers of a sort. My work led to me serving on technical committees of both the Canadian & US National research councils.

 

[LightSpeed]

The photos were taken about 2 minutes apart. Just enough time to take a filter off, or put one on. I don't want to reveal which came first at this time. I don't know your name Barcode, so I hope you don't mind me calling you Barcode. Thanks for participating civilly. I really appreciate it. Same goes for Ron Evers.

 

[Josh66]

I don't know your name Barcode

Do you mean me?
(It's a Jeep, and my name is in my signature - Josh. )

 

[Bitter Jeweler]

I can't wait for your strict test to find out how many regular lens cleanings it takes to ruin your lens.

 

[usayit]

I don't know your name Barcode

Do you mean me?
(It's a Jeep, and my name is in my signature - Josh. )

I always thought it was a Hummer....

Now I shall Run and Hide.

 

[Josh66]

I don't know your name Barcode

Do you mean me?
(It's a Jeep, and my name is in my signature - Josh. )

I always thought it was a Hummer....

Now I shall Run and Hide.

:lmao:

Hummers have square headlights, don't they?


And I've seen more stuck Hummers than Jeeps...
(Mostly due to the fact that Hummer owners think they're invincible since they have a Hummer...)

 

[mrpink]

Do you mean me?
(It's a Jeep, and my name is in my signature - Josh. )

I always thought it was a Hummer....

Now I shall Run and Hide.

:lmao:

Hummers have square headlights, don't they?


And I've seen more stuck Hummers than Jeeps...
(Mostly due to the fact that Hummer owners think they're invincible since they have a Hummer...)

No, they are round. Do they have UV filters on them?

Who had the link to the guy that put pieces of tape on his lens to show how scratches and dirt really do not effect overall image quality?







p!nK

 

[Ron Evers]

I can't wait for your strict test to find out how many regular lens cleanings it takes to ruin your lens.

With the method you proclaimed in another thread, you get this quickly, not over a prolonged time.

 

[Josh66]

I can't wait for your strict test to find out how many regular lens cleanings it takes to ruin your lens.

With the method you proclaimed in another thread, you get this quickly, not over a prolonged time.

Yes, but how do the pictures look?

I would maybe expect a slight loss of contrast, but other than that - I don't know. Even the contrast loss might not even be detectable...

 

[Dao]

I believe most of the car plastic headlight housing has a UV coating on it. If you use polish compound and rub it off, your headlight housing may turn yellow quicker.

Do you mean this link?

LensRentals.com - Front Element Scratches