Discussion in 'Fire' started by riverjoe, Jun 14, 2019 at 4:46 PM.
well except the skill of scrapping .
This is the front screen of an old projection TV .
Wow, that's like a super-duper magnifying glass; nice job!
I may be wrong but I think @svh melted a coin with one of those...?
Heck if I lived in New Mexico I could forge blades with that thing .
dunno know about that, but i've watched @jswi2374 melt a penny with a lens the size of notebook paper! i had seen a youtube video of people who made a forge/foundry out of one of these...
Solar power weed burner. Awesome!
With a lens that big you could probably melt a hole to the core of the earth!
If I'm understanding this correctly, the sun is hot. And when it's magnified it's real hot. I never would have thunk it!!
Awesome I need some photo cells and motors
I had to put on my shades just to look at the picture.
I just wish we had fire ants in Indiana
You take that back!
I would not wish that on anyone.
Not all projection screens fresnel sense work the same. Mine is rather poor but the primary 3" lenses are great.
Many an ant soul was liberated from is earthly casing in this manner when I was a lad growing up in Arizona. Sometimes I feel like I'm still working off the karma from those days. Unspeakable carnage...
"With great power comes great responsibility"
Keeping that in mind, I stay away from the big, TV sized lenses. The 8.5x11 lenses from the dollar store are big enough for fires and pennies. Those massive ones are scary powerful. I'd get in too much trouble. Bought a few more paper sized lenses just a few weeks ago.
Do you think @dadman has forgiven me for destroying his penny?
I’m thinking world domination .
Make some coffee or cook a hot dog.
I’ll try , but it’s seems we get one sunny day a month .
@jswi2374 I just googled the dollar store fresnels and a you tube popped up . I’m sure you noticed this but look
at my pic above and notice all shade under neath the sheet except for the focal point . That would probably be a good way to judge the efficiency of a particular lens . If sunlight were leaking through less efficient .
I have lol that was fun. I still carry that in my pack.