500 posts now, time to give something away (winner announced)

I am in!

I’m in

Thanks.

I gave you credit for trying. Good effort, the $20 cap may be unreasonable for a good lens this size with a short focal length.

Entries up to date as of this post.

i am in ,thanks.

about lenses:

http://www.aliexpress.com/store/product/Car-LED-optical-glass-lens-diameter-100MM-10W-100W-led-lens-Plano-convex-lens/219000_1342510746.html 100mm

http://www.aliexpress.com/store/product/High-power-10W-100W-LED-optical-glass-lens-diameter-104-glass-led-lens-LED-convex-lens/219000_882143428.html 104mm

http://www.aliexpress.com/store/product/High-power-10W-100W-LED-optical-glass-lens-diameter-108mm-glass-led-lens-LED-convex-lens/219000_882094653.html 108mm

I intentionally tried to pick some good things to give away because this has been a great place. Compared to what I’ve learned in my time here this hardly seems generous enough.

The people like djozz, HKJ, (removed to protect the innocent :wink: ), Old-Lumens, RMM, n10sivern, Wight, and others, have given far more to this community in the form of their time and effort. I know that I and everyone else is standing on the shoulders of tall men, and they have made it easy to light up the next mountain over, and wonder how much further we can go.

Wait!! What if we don’t want to be cured?!

Isn’t that item and the others mutually exclusive? If I take the cure, what would I want all that flashlight stuff for?! If I take the flashlight prizes then I’m going to run from your “cure”!

One day it might save your marriage. :bigsmile:

I actually exercise good self control with flashlight purchases, I need no cure.

What diameter tailcap board for a 3 cell soup can? Parallel 3 x 18650?
This would be something you’re in need of for one of your lights?

I’m in.

I’m in.
I ’d like to participate competing with your rules, but i m not very good yet in finding appropriate things for advanced modding… I usually end buying something useless…anyway. …is this appropriate to your terms?

https://m.fasttech.com/product/1414300-100mm-5-120-degrees-plano-convex-lens

I’m in

Parallel 18650’s, I’m working on designing a light, so there are no specific requirements for diameter of the board, but it needs to be designed for high amps/low resistance. Good springs would be nice, but not a necessity as they will be bridged with 18ga wire.

I’m in.

I love the light to cure my problem, but I like the other items even better!

Great giveaway, and congrats on your 500 posts. I agree, this is a great community. Thanks.

I’m fairly sure the focal length is going to be longer than 100mm being only 19.5mm thick. I’ll give you credit for trying when I update the list.

I’m in
Thanks!

im in
i have worked in an optical industry for a year and man these glass lenses are
hard to make. imagine polishing one of these.

I’m in!
Thanks!!!

Im in :stuck_out_tongue: Thanks buddy!

I’m in

And to answer your request, here it is… Boom!!!
http://www.dx.com/p/99mm-replacement-glass-lens-for-flashlights-43043#.VVbiVqlIfpo

99mm x 80mm FL
$10.74 shipped

I also usually check for lenses in Anchor Optics, Melles Griot and Surplus shed

Surplus shed has a lens that is 126mm and a FL of 300mm
http://www.surplusshed.com/pages/item/pl1273.html

Anchor optics has a lens that is 100mm and a FL of 200mm
http://www.anchoroptics.com/catalog/product.cfm?id=417

This place has 75mm and 50mm FL
http://search.newport.com/i/1/nav/1/q1/Lenses/q2/Aspheric%2520Lenses/q3/Aspheric%2520Condenser%2520Lenses/q4/2.95%2520in.%2520(75.0%2520mm)/x1/section/x2/chapter/x3/family/x4/facetValue04

This place has 75mm x 60mm fl
https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=3835

This place has 80mm x 59mm fl

Saabluster used a very big glass Aspheric Lens for his very first DEFT that came from a Subaru SVX ’92 Hid Headlight lens - 79mm dia, bfl 54mm is F# 0.71

Or you can find hi quality optics in those old projection tv’s for free if you know where to look, they are also big.

HTH
AlexGT

I’m in