A friend has a piece of Hematite, quite a spectacular spherical piece, about 100mm (4 inches) in diameter, very heavy, black with dark grey and faint dark red/brown markings/streaks. It has a rosetted fracture mark where it may have separated from another piece of Hematite. Otherwise not a lot of texture. I believe it's of the type known as 'kidney ore' and the spheres were sometimes found in clusters. Hematite is known to be brittle and has an almost glass-like feel.
This is the only piece of Hematite ore I have seen to handle. It's quite spectacular and I believe an outstanding example. I want to photograph it but am unsure how to capture the piece to do it justice. I feel that it really needs recording so that others can see this lovely example and examine it closely if they wish.
From my recent attempts at 360/180º landscapes (as 360cities), my thoughts turn towards 360º imaging, in this case inwards, rather than outwards. I would need fine detail, a depth of good focus of about 2 to 3 inches and presumably a longish focal length (~105mm?) to avoid the distortion which a wider angle lens would produce. I will be using a D3, I have Nikkor D 50mm f1.4, Micro Nikkor 55mm f2.8, Nikkor AI 105mm f2.5 and Micro Nikkor 105mm f4 in the range I feel may may appropriate.
From what I can gather, about 24 images around a subject are good but perhaps it also needs 'zenith' and 'nadir' image too? It can be placed on a turntable or a bearing to rotate it.
I have searched 360º product photography but what I am finding seems entirely commercially orientated with very expensive software or licences to host the images on specialised servers.
I have been pondering this for a year or more but I need to actually do something, the owner is elderly and in poor health. I currently have permission to photograph it, that could change, so any suggestions are welcome.
I am guessing it needs to be converted to some specialised format for display, I would like the viewer to be able to zoom in, rotate and tilt the image to view the entire sphere, in a similar way to 360/180º panoramas.