My new Canon extension tube

Playing around with extension tubes today, while cleaning my gear, not a fantastic macro shot but I like the abstract nature.

Any ideas? This shot was taken with my Canon 100mm 2.8, mounted on a full set (around 60mm) of no-brand extension tubes (with no electrical contacts). The flash (430ex, on bracket and diffused with coke can diffuser) was set manual at 1/8 power, and positioned above the lens, pointing towards the subject.

Aperture was manually set to f16 using the lens on the body, then DoF preview button, removing and mounting on the tubes.

The subject was on a windowsill, well lit.

The point: There's a big hotspot in the middle of the image. When looking through the viewfinder, vignetting is clearly visible. Can anyone advise as to the reason? Thanks in advance!

Extension tube macro of a little potted cactus.

166/365

My daughter's eye with Saints Logo.

Imma EATCHA!

Orchids Greenhouse, Jardim Botânico do Rio de Janeiro

DSC04315_light_spot_macro

DAL18-55 reversed on M135mm f3.5 with 60mm extension on Pentax Kx

Playing with extension tubs - my child won't sit still long enough for a clear shot!!!

*the* perfect setting, and the best shot (of many, many attempts)

Tried out my new extension tubes on this one. Sigma 105mm +12mm extension tube. Dual off-camera flash (thanks Neil) with half blue gel.

Pentax Spotmatic camera with Extension tube , 50 f/1.4 lens.

Nikon D3100 + Nikkor E 50mm + (home made) extension tube

Flowers, Macro, Extension Tubes,

Aberdeen, Scotland, United Kingdom

Strawberry shot using a 12mm extension tube.

Sitting on a plastic yellow chair

Cheap Quantaray 100-300 lens on a set of Extension tubes.

THIS WAS ONE OF THE FIRST TAKEN WITH MY CANON 7D AND EXTENSION TUBES USED. THIS HIBISCUS WAS THE FIRST TO BE SOLD BY A FARMER WHO BECAME MY FRIEND. I GAVE HIM AN 8X10 PRINT.

trying out my new toy - kenko extension tubes on my 28-300 zoom to get better close-ups. the only flower left in the garden was this weed popping up from under next door's fence!

this was the best i could get without the extension tubes.

Nikkor 85mm f2 with PN1, flash on camera with DX diffuser.

this is a manual 3-set extension tube. it won't work with electronically controlled aperture lenses. so you won't have an aperture reading in your camera and lens aperture is set to the smallest (highest f-number). might work though with lenses that has a manual aperture ring.

Taken with a 20mm Extension Tube

Close-up of a Snail shell from at Tondoon Botanic Gardens, Gladstone, Central Queensland.

Unidentified Vespid Wasp on Kangaroo Paw, Calliope, Queensland.

Nikkor 28-300 with extension tube

A fly taken with extension tubes and ring flash.

This moth was on the window, the outside down lighters lit it perfectly, I just had to grab a photo.

Taken with my 50mm AIS lens on macro extension tubes.