![]() Then the focus gets too close to the lens, or even inside. Yes, the available extension tubes are usually too thick. Such helicoids adapters work as variable extension tubes, so the effect can be modified easily. The best approach would be for this technique a sigma 15mm lens attached to a helicoids adapter and used on a full-frame camera (A7 series). Since you can’t add close-up lenses to a fisheye lens, the only solution is extension tube. No need for awkward handholding, so I can imagine that the technique could be even used without a tripod with such set-up. This technique, of course, requires a tripod and subjects stay still.Lighting the subject will be necessary most of the case, which is quite challenging due to the close focus distance, but not impossible if you use optical fibres to direct the light from the main flash to the subject.You can set the aperture before you detach the lens (when the camera is on) and the lens will keep the set values.Focus manually the lens to infinity (set focus mode to manual) otherwise the subject will be just too close and it will practically touch the lens.This is with the standard fisheye effect (closest focus possible): ![]() I've also tried it with a gooseberry (check my arm): The flower is relatively small (around 30 mm in diameter): This one is taken by handholding the lens few mm away from the camera. This photo was taken with the closest focus distance, when the lens attached correctly: Pushing it to the mount gives you 6-7mm distance and it worked. I’ve simply detached the lens from the camera and held simply in front of the camera to mimic the effect of an extension tube. I really like the effect on his picture, so I kept experimenting with the idea. He used a custom made 8 mm long extension tube with sigma fisheye. However, I’ve seen recently an excellent photo from Nikola Rahmé, who is one of the best macro photographers. I’ve quickly tested a 10mm tube on my sony nex with the 16mm+ VCL-ECF1 combo, but the effect was too strong. However, going even closer would be nice sometimes. Sigma 15mm fisheye is excellent regarding this and the sony fisheye converter (VCL-ECF1) on the 16mm macro is also quite good if you want to go close to your subject. Modern fisheye lenses have relatively good close-focus abilities therefore they’re excellent tools for this kind of photography. This post is based on my recent blogpost you can find here:
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