Last week I bought some extension tubes for the camera off eBay. An extension tube is an attachment for an SLR camera that fits between the lens and the camera body, effectively making the lens longer. I bought the set for a mere £4, thinking if they didn’t work then it wasn’t exactly a waste of a lot of money.
I didn’t get around to playing with them for a few days, but the other night I set the camera up on the tripod and had a go. The tubes are just hollow plastic tubes, one has the same mount as the Nikon lenses, so you can attach it to the camera, another has the same mount as the camera body, so you can attach that one to the lens. The tubes all screw together, and you can put any or all of the other tubes in the middle to make the extension the length you want it to be.
Normally, the camera talks to the lens via a series of electrical connection points, but when using these tubes, those connections are lost, so the camera thinks the lens isn’t attached. This means that you lose all the automatic functions of the camera, and are forced to work in purely manual mode. Everything from shutter speed to aperture to focus was done manually.
So, with my expensive camera loaded up with its £4 extension tubes, mounted on its £1.50 tripod, and set into remote shutter mode, I started to take some pictures. The experiments I did were all indoors, with just the normal lighting in the room. I had to set the ISO to 1600 and use a three second exposure to get the pictures coming out even halfway decent, but once I managed to work that out, I was very impressed with the results! I looked around the room trying to find things to photograph, and set up a stack of dvd’s in front of the camera so the object I was photographing was level with the lens. This is why the first pictures I took were of the stack of dvd’s itself…
(click on each thumbnail to see a larger version of the image)
I then took a photo of the business end of an AA battery:
a safety pin:
The edge of a microfibre cleaning cloth:
A bar code:
and finanlly, a tape measure:
Here’s a picture of everything together so you can see them all at “actual scale” as it were:
I don’t know how often I’ll use the tubes, or if it’s practical to use them outdoors at all. With all the tubes on the camera the level of magnification is rather huge, and the objects I’ll be photographing like this will, by necessity, be tiny. I’ll do some more experiments soon with fewer tubes on the camera and see if I can take any photographs hand-held, but in the meantime I think these cheap tubes were a worthwhile investment!
