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IPhone 4, iPhone 4S Slide-On Macro Lens

Picture of iPhone 4, iPhone 4S Slide-On Macro Lens
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When I couldn't find a macro lens for the iPhone 4 that had decent quality for less than $60, I designed a slide-on lens holder that can be printed out at Shapeways: http://www.shapeways.com/model/328790/

It takes a 12mm glass lens that can be bought from Surplus Shed (http://www.surplusshed.com/) for $4 - part number L4471. That was the cheapest place I could find for glass lenses.

The lens drops into a recess in the holder and is held in place by a tiny bit of superglue or similar. if you get glue on the lens, it can be cleaned off with nail polish remover or acetone. The lens I used is plano-convex (one side is flat). When inserted in the holder, the flat side of the lens faces the phone.

I also should note that you need to remove the iPhone's case, if it has one, to use this.
freelancing11 months ago
I ordered this one from shapeways several months ago and took lots of great macro shots with it. I've almost dropped my phone a few times which scares me - since I have to take it out of the case to use this perfectly-fitting 3D printed object... so here's my question:

I've got a 4S with a Spigen Linear Color case AND the Spigen GLAS.t film (which is pretty thick, since it's made of real tempered glass) on the front.

So - I'd need to make a modified version of your great design... I'd like to do some other mods to it to make the lens easier to clean, too - but wondering how you get the exact measurements just so. Do I use a micrometer? Do you have a recommended brand or method?

What software did you use to submit your design to shapeways (I'm inexperienced in 3D modeling)?

And finally - is there a formula for which you decided the right lens for macro (ie - would there be other lens options for making an even closer macro?) ?

Thank you!  This is the first instructable I've ever done and I've taken dozens of cool shots w/ it that I've used on projectnoah.org of insects, etc.
appsman (author)  freelancing11 months ago
I just measured the phone the best I could, and made 3 or 4 iterations before I got the fit right. I had an especially hard time getting up to speed on any of the normal CAD programs, so I did this on Sketch-up. It's not the best for this sort of thing, but even Autodesk 123D, which was *supposed* to be simple, just made me pull my hair. I've been told that the software sold by the makers of the Cube is nice, but I haven't tried it. The problem is that the simple-to-learn design software assumes that you are playing or making 3D face scans or whatever, and consequently don't make it easy to have precise dimensions. This lens isn't complicated, but the dimensions are of course important.

You'll probably be shocked, but I don't know that much about lenses either. I arrived at my lens choice by holding various junk box lenses (I collect that sort of stuff for tinkering) in front of the camera until I got the focus I wanted. Then a friend told me how to get the focal-length by focusing a distance point source (sun or even a light-bulb more than 10 feet away) on to a sheet of paper. The distance from the paper to the lens is it's focal length. After I had that number, I bought some lenses on-line that were around that number (also a bit bigger and smaller) and picked the one I liked best. Surplus Shed seemed to have the best deal. If you find better please post it.

A shorter focal length will give you closer macro. I tried 39mm instead of 51mm. It was closer but I thought a bit harder to use, so I stuck with 51mm.
appsman (author) 1 year ago
Note all - I finally got the iPhone 5 version of this up on Shapeways.
http://www.shapeways.com/model/864992/iphone-5-macro-lens.html?li=moreFromShop/?material=62
Sgtpilot2 years ago
Wonderful! What lens would I need for a wide-angle adapter?
Since the lens is plano-convex you could play around with it upside down at varying distances from the inbuilt lens.
Turtlepwr1 year ago
Just curious how much is it all together.if you don't mind
appsman (author)  Turtlepwr1 year ago
The 3D printed holder is $11 from Shapeways, and the lens is $4 from Surplus Shed. They each charge $4 or $5 for shipping so it's about $25 if you buy only one, but gets close to $15 if you buy more. Also, the lens drops to $3 for 10 or more, and Surplus Shed periodically has 30% off sales.
AAndy1 year ago
unfortunately, L4471 isn't at the Surplus Shed anymore...8o(
appsman (author)  AAndy1 year ago
Actually it still is there. For some reason the search box does not work with part numbers. I can still get to L4471 by using the "Lens Finder" on the Surplus Shed home page. In the Lens Finder type:

Lens Type: PCX, Plano Convex
Diameter: 12mm to 12mm
Focal length: 51mm to 51mm

It will get you to L4471.
echomrg2 years ago
impressive!!! :D

is the 3D file available for self-printing?
i don't know how shapways works... (i.e. if you get money for each object printed) so this might be a silly question.

M
appsman (author)  echomrg2 years ago
Yes, if you follow the Shapeways link, you can have them print and send you a lens holder. Then go to Surplus Shed for the glass lens and glue it in.
mikroGanesh2 years ago
cool!
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