galacticprobe
Active member
Not a "Fresnel proper", but it does have the shape, and seems to still be available:
http://www.vermontlanterns.com/content/anchor-lamp-chimney-19
It's the largest of this lens (or "chimney" as they call it) they have available. The close-up image isn't the best for measurements, but they do answer questions about specifics rather quickly when you e-mail them. It's worth a shot, and for the price, you can't beat it until you find a proper Fresnel lens.
And if worse comes to worst, would it be possible to router a groove for your current lens to sit in? Or maybe router the outer edge of that circular part to reduce its diameter to your lens would fit over it? (The same for the above lens in the link, that is if it's a little larger than your current lens?)
Just a thought.
Dino.
http://www.vermontlanterns.com/content/anchor-lamp-chimney-19
It's the largest of this lens (or "chimney" as they call it) they have available. The close-up image isn't the best for measurements, but they do answer questions about specifics rather quickly when you e-mail them. It's worth a shot, and for the price, you can't beat it until you find a proper Fresnel lens.
And if worse comes to worst, would it be possible to router a groove for your current lens to sit in? Or maybe router the outer edge of that circular part to reduce its diameter to your lens would fit over it? (The same for the above lens in the link, that is if it's a little larger than your current lens?)
Just a thought.
Dino.




