#15 in Science education supplies
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Reddit mentions of 6pc Optical Lens Set, 2" - 200mm, 300mm, 500mm Focal Lengths - 3 Double Convex & 3 Double Concave, 2" (50mm) Diameter Lenses - Optically True Glass - Ground, Beveled Edges - Eisco Labs

Sentiment score: 1
Reddit mentions: 3

We found 3 Reddit mentions of 6pc Optical Lens Set, 2" - 200mm, 300mm, 500mm Focal Lengths - 3 Double Convex & 3 Double Concave, 2" (50mm) Diameter Lenses - Optically True Glass - Ground, Beveled Edges - Eisco Labs. Here are the top ones.

6pc Optical Lens Set, 2
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SPHERICAL || Each lens is spherical in shape and measures 2" (50mm) in diameterFOCAL LENGTH VARIETY || Converging and diverging focal lengths in 200mm, 300mm and 500mmOPTICALLY WORKED GLASS || Made of high quality, optically worked glass. Highly polished with ground edgesGREAT FOR PHYSICS CLASSROOMS || This optically true lens set is excellent for physics classroom demonstrations in optics and light refraction
Specs:
Height1 Inches
Length3 Inches
Number of items1
Weight0.0440924524 Pounds
Width2 Inches
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Found 3 comments on 6pc Optical Lens Set, 2" - 200mm, 300mm, 500mm Focal Lengths - 3 Double Convex & 3 Double Concave, 2" (50mm) Diameter Lenses - Optically True Glass - Ground, Beveled Edges - Eisco Labs:

u/420theorist · 22 pointsr/trees

Ok man... here we go I got a plan for you. You should build a time machine and you could go into the future and spend that $50 on some trees when they were available...


The Plan



You need

  • 2718 x 72" Hex 303 Stainless Steel, Cold Finished, Annealed (Might just want to get an even 3000 for replacements and such)


  • 200m of high voltage, high temp copper cable, silicon coat is ideal


  • 7 x 5L Dewer Flasks with welded handles (And source of LN2)


  • 32 x Concave Mirrors


  • 32 x Optical Glass Lens Set, 50mm (Half Double Convex (20, 30, 50cm FL) and half Double Concave (20, 30, 50cm FL)


  • A well stocked home depot


  • An envelope


    The Time Machine



    Take the money you have NOW for the trees and place it in an envelope, and put the envelope somewhere safe. You will be taking this envelope into the future with you. Now, take all the other stuff and go build a time machine.


    One of the two things will happen


  • You fail to build the time machine, but when there are trees around and for sale you can go retrieve those $50 from the envelope and buy them. Who needs a time machine when you got green anyways??


  • You successfully build a time machine and become the first human to achieve time travel. Who needs trees when you a have a time machine???


    The way I see it, its a win win.
u/JDmik · 3 pointsr/Android

At the time when I was first ordering, the link that Google provided was sold out so I searched amazon for an alternative. I don't know anything about lenses though, and I didn't realize double convex and bi-convex were not the same thing.. so I ended up with these: http://www.amazon.com/gp/aw/d/B00BIKGMZ8 . In addition to not being the correct style of lens, they're also too big (50mm diameter instead of the 25mm they are supposed to be. )

u/hovissimo · 1 pointr/functionalprint

https://smile.amazon.com/gp/aw/d/B00BIKGMZ8/ref=mp_s_a_1_9?ie=UTF8&qid=1501301361&sr=8-9&pi=AC_UL420_SR280,420_FMwebp_QL65&keywords=lenses

Looks like they're designed for classrooms. There are other packs about the same price with different selections.