Cheap Fisheye Lens

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Intro: Cheap Fisheye Lens

How to make a cheap fisheye lens for a compact digital camera.

You will need:
(1) Your digital camera - I used a Canon Ixus 65
(2) An old or broken SLR zoom lens - I picked up a Sigma 28-200mm from the broken lenses box of a camera shop for 5 quid, I think the autofocus didn't work.
(3) some really tiny screwdrivers, these SLR lenses are held together with tiny screws
(4) Luck - plenty of it
(5) Black electrical tape, various tubes, superglue, elastic bands, anything else you can think of to make a mount for the lens.

Step 1: Take the Lens Apart

Take the SLR lens apart using all the tools you can muster, you will probably need some very tiny screwdrivers.

You are after the lens element that sits just behind the front lens element. Keep all the other bits for other projects.

Step 2:

You are after this bit, it normally sits just behind the front lens.

Hold it up an look through it, does it appear to show you a nice wide image?

Step 3: Test the Lens Out

Test the lens out, hold it in front of your camera.

You may need to put your camera in "macro" mode (the mode you use to shoot pictures of close up objects) to get it to focus correctly. Try playing with the zoom options on your camera as well, you may have to play about to find the sweet spot.

You may also need to vary the distance from the front of your camera lens to the fisheye lens.

You are after a nice crisp image but be aware that there may be some blurring and distortion near the edges.

Step 4: Add a Tube

If you are been lucky you have now got a fisheye lens that seems to work with your camera. You will probably want to make some sort of mount for it as it can be a bit trick to hold the lens just the right distance away from your camera, point it all at the subject and take a sharp picture all at the same time.

I started by adding a tube that holds it just the right distance away so that it all focuses correctly and adds a bit more stability.

I used the plastic inside tube from a roll of sticking plaster, this just happened to be the right diameter to attach to the fisheye lens and the right length to produce a sharp image.

You will have to raid your spares box and experiment a bit to find something that work for you. Plastic tube is good as its soft and easy to cut and adjust.

Wrap some black electrical tape around whatever you use to keep any stray light or reflections spoiling the image.

Test it out, see if it works for you, you will still have to hold it but it will be much steadier.

Step 5: Make a Mount

After you have made a tube you may want to create a mount for it to hold the lens firmly.

I tried a few different ways including holding it on the front with elastic bands.

In the end I had a metal mount made by a friend as they have a workshop and various metal bending tools.This mount allows me to mount the camera and lens to a tripod or my bike so I don't have to hold it all in place. It makes it very easy to make fisheye films.

You may be able to make one from card wrapped in duct tape, a bit of road sign that you acquired or from the side of an ice cream tub or box., it should be fairly rigid.

The mount is secured to the camera with a quick release plate from my tripod. The bolt passes through a hole in the bottom of the metal mount and screws into the tripod mount of my camera holding it all together tightly.

Some cameras (like mine) don't have the tripod mount directly in line with the centre axis of the lens, you will have to allow for this offset when designing your mount. "Measure twice, cut once" is the best advice I can offer here :)

Have a look at my set on flickr for some more fisheye photos.

You can use FisheyeWarp to do clever things to your images, its free!

Have a look at this Flickr Group for DIY lenses

Go out with your new lens, shoot everything again in super wide vision.

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    20 Discussions

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    bertus52x11

    8 years ago on Introduction

    Patholio, I have disassembled a 28-80 lens and the fish eye effect is less spectacular than in your case even though the focal length at the lower end is the same (28mm). Is this  because the set up of the lenses is different in both cases?

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    bertus52x11

    8 years ago on Introduction

    Very nice! I will definitely make one of my own!
    I like the fact that you use an old lens instead and the fact that it is secured to the body of the camera.

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    sjoobbani

    8 years ago on Introduction

    I have trouble with 2 things:
    focus

    Lighting.

    Focus: i tried on landscape, i tried autofocus, and I tried macro. what to do? still blurry, i understand the edge's could be blurry, but the whole thing?

    Lighting: everything seems a darker, and flash ruins things even more. tried different exposures, brightness... only thing to do, is use the Nightvision mode on the camera, from my 'ible : and that makes everything green, so...
    please help.

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    lieuwe

    9 years ago on Introduction

     the only problem might be that if you zoom in/out the cap might fall off or you might wreck your camera zoom-mechanism....

    2 replies
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    patholiolieuwe

    Reply 9 years ago on Introduction

    Lieuwe, You do have to be a bit careful if you zoom, i found that I didn't have to as it only works in macro mode (no zoom), I was lucky I guess. I still have to be careful when I turn it on though.

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    sjoobbanipatholio

    Reply 8 years ago on Introduction

    I have mine set up so that It is slidable, and then I can move the support platform on a hinge, so it folds, also compact, so I turn the camera on, mount the lens, and flip the hinge, in a matter of seconds.

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    patholiodigjam

    Reply 8 years ago on Introduction

    Get a laser, spare bits of lenses are always handy if you have a laser, mind your eyes though.

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    patholio

    8 years ago on Introduction

    Whiternoise, SRS camera shop in Watford has a bargain box. Most independent camera shops have a box of crap they would love to get rid of, just ask.

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    Whiternoise

    9 years ago on Introduction

    Which camera shop was this that sells broken lenses for a fiver?

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    implaxis

    9 years ago on Introduction

    Now I know what to do with all those old "useless" lenses!