Lens Hoods
A hood aka lens hood stops light coming into the lens at extreme angles and being reflected inside the lens. The idea behind this camera lens hood is that it can lower the contrast of the image. For cameras that have interchangeable lenses, most lenses come with integral or accessory lens hoods.
Why use a lens hood? Well aside from stopping light coming into the lens at extreme angles, a lens hood lets you to shoot towards the light source, so long as you keep it outside the image area, without excessive flare. It can produce some really interesting results.
You can comparison shop for Mamiya lens hoods on the Internet and while hunting will run across several kinds of lens hoods, including the Mamiya Bellows lens hoods. If on the other hand you want to find Canon camera lens hoods, make sure you know what will work best for your line of work.
Lens hoods need to be matched to the angle of the view of the lens, and exclude as much light as possible without being visible in the picture. So, know your camera and the product you want to buy. If that happens to be a Canon lens hoods, make sure that you will get what you want in a lens hood before you buy one. This same observation would apply to the Fuji lens hood as well. Know your camera and what would be the most compatible with it.
Something that will help you make some lens hood choices would be finding a lens hood chart. They're a pretty complete listing of what lens with work with what hoods and with what filter size. Again, as with so many other things these days, you can find a fairly comprehensive chart on the Net.
One other decision you may need to make before you buy a lens hood, and that is whether or not you want a standard one or a rubber lens hood. The bonus for the rubber lens hood is that it's collapsible. It folds back over your lens for storage. Plus, the inside front thread let you attach filters or accessories.
Still searching? Actually, that's a good thing, because even if you are not searching for a brand name lens hood, but say 48mm lens hoods, a 42mm lens hood or lens hoods for 80mm lens, you will have good luck on the Net. It is only going to take at the most one or two clicks to narrow in on the information you want to know. And maybe one or two more clicks to fine tune your search parameters to add in the extra things you might also be looking for in a lens hood.