 Martin Baadsgaard |
Equip. for 180 degree capture with 18-70mm and D70 Hey there. I am looking for a way to capture everything in a 180 degree angle using my D70 with its 18-70mm Nikkor DX lense. I don't mind if the picture ends cropped up in a sphere--shape. The idea is to capture the lighting conditions of a given place for recreating it in a 3d environment. Normally you take pictures of chrome balls , but they give poor quality because of small scratches etc. and because the camera and photographer can be seen in the picture. So if I could find a converter of some sort to get my 18mm down to 10mm or something like that, so I get everything in nearly exactly 180 degrees, that would be nice. Anyone know of any products like this? Don't know how strong a wide angle converter I'd need :S
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Brendan Knell |
Have you tried stichting photos? It works really well and with stiching it makes huge resolution photos. For example if you stich 2 photos with your D70, you would get aproxamatly 8-11MP photo, if you stiched 3 you would get about 14-18MP photos.
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Martin Baadsgaard |
I like the idea, problem is just that I don't just want a panorama, I want a hemispherical image. Usually, a picture of a chrome ball is converted into a map with deformations making it fitted to be mapped to a sphere in 3D. So what I need is a way to take a picture that looks like it was a reflection from a sphere, that is, a picture where you can see 180 degrees of the environment wrapped in a circle. This effect can be archieved with a strong enough wide angle converter, or with a fisheye lense as far as I know. But I need to know what converter would do the job on my 18-70mm Nikkor DX lense, and there has to be taken into account that the D70 has the cropfactor of 1,5...
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Christopher A. Vedros |
Martin, I searched around a bit, and found some fisheye lens attachments that screw into the filter threads on the front of a lens that widen the view by applying a .3x factor to the focal length. I think that factor would give you the field of view you're looking for, but the largest I've seen so far fits a 58mm thread, and your lens has a 67mm thread. Try doing some searches for "fisheye attachment" to see what you can find. Most of these are designed to fit point & shoots or video cameras, though.
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Jon Close |
Maybe something like this? http://www.bugeyedigital.com/product_main/036-0360d.html or http://www.pcmag.com/article2/0,1895,15635,00.php These seem sized for p&s digitals rather than DSLRs though.
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Martin Baadsgaard |
Well that's exactly my problem! That, and the fact that I don't know what factor I need to get as close to 180 degrees as possible. don't want a 184 degree, or 170, I need to be as close to 180 as possible... Problem is that both of my other lenses are 70mm and above, so I can't make those fisheye...
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Christopher A. Vedros |
Jon, I've seen that bugeye thing before, it looks really cool. You mount your camera on a tripod pointing straight up and attach this cone-shaped mirror gadget to the filter threads. You take a picture, and the software package translates it into a 360-degree scrolling panoramic for a webpage virtual tour. I'm sure there are cheaper ways to skin that cat, I just think it's a very clever design. Martin - back to your problem. If you really need a full 180-degree view, you might have to bite the bullet and get a true fisheye lens. Sigma makes an 8mm fisheye for about $600 that gives a true 180-degree semi-circular view. Some other fisheye lenses in the 12-15mm range only give 180-degrees measured on the diagonal. Now I don't know how the fisheye view is affected when you put it on the 1.5x factor dSLR. You might still end up with less than a 180-degree view.
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Kerry L. Walker |
Another reason to stick with film! LOL Sorry, I couldn't help myself.
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Martin Baadsgaard |
Hehe, this is kinda funny... :P One of my friends just bought a Canon EOS 300D, and with it he got 2 lenses: A tamron 28-80mm (I think it was) and a fisheye with perfect 180 degree view :D Which is perfect, cause I can just borrow his to get my shots!
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