You can buy original hand-signed autographs from reputable dealers and auction houses that specialize in autographed memorabilia. Look for established companies with a good reputation for authenticity and quality, such as RRAuction, Heritage Auctions, and Autograph World. You can also find autographed items at memorabilia conventions, celebrity events, and through private collectors. Be sure to do your research and verify the authenticity of the autographs before making a purchase. **

A prime lens with a focal length between 35mm and 50mm is typically considered suitable for street photography. These lenses offer a natural field of view that closely resembles what the human eye sees, making them great for capturing candid moments in urban environments. Additionally, prime lenses are often compact and lightweight, which is ideal for street photographers who need to move quickly and discreetly. Overall, a 35mm or 50mm prime lens is a popular choice among street photographers for its versatility and ability to capture authentic moments. **

A macro lens is typically the best choice for product photography. Macro lenses are designed to capture small subjects with great detail and clarity, making them ideal for capturing the intricate details of products. They also have a close focusing distance, allowing you to get up close to the product for detailed shots. Additionally, a lens with a focal length between 50mm and 100mm is recommended for product photography as it provides a natural perspective and minimizes distortion. **

For animal photography, a camera with a fast autofocus system and high burst rate is essential to capture fast-moving subjects. A good choice would be a DSLR or mirrorless camera with at least 20 megapixels for high-quality images. As for the lens, a telephoto lens with a focal length of 70-200mm or longer is recommended to get close-up shots of animals without disturbing them. Additionally, a lens with image stabilization can help reduce camera shake when shooting handheld in low light conditions. **

For wildlife photography, a camera with a fast continuous shooting speed, high resolution, and good low-light performance is ideal. Cameras like the Canon EOS 90D, Nikon D500, or Sony Alpha a6600 are popular choices. When it comes to lenses, a telephoto lens with a focal length of at least 300mm is recommended to capture distant wildlife without disturbing them. Lenses like the Canon EF 100-400mm f/4.5-5.6L IS II, Nikon AF-S NIKKOR 200-500mm f/5.6E ED VR, or Sony FE 200-600mm f/5.6-6.3 G OSS are great options for wildlife photography. **

It is possible to sell a hand-signed original watercolor by Udo Lindenberg from 2008 in Vienna at art galleries or auction houses that specialize in contemporary art. Additionally, there are online platforms and marketplaces where individuals can sell art, such as ArtNet or Saatchi Art. It is important to research and find reputable venues that cater to the sale of original artworks by well-known artists like Udo Lindenberg. **

The best camera for wildlife photography is typically a DSLR or mirrorless camera with a high resolution sensor, fast autofocus system, and good low-light performance. Popular choices include the Canon EOS 5D Mark IV, Nikon D850, or Sony A7R IV. For lenses, a telephoto lens with a focal length of at least 300mm is recommended for capturing wildlife from a distance. Some popular options include the Canon EF 100-400mm f/4.5-5.6L IS II, Nikon AF-S 200-500mm f/5.6E ED VR, or Sony FE 100-400mm f/4.5-5.6 GM OSS. Ultimately, the best camera and lens will depend on your budget, specific needs, and personal preferences. **

Without physically examining the signature and the signed photo of Hermann Göring, it is impossible to definitively determine the authenticity of the signature. Authenticating a signature typically involves a thorough examination by a qualified expert who can compare it to known examples of the individual's handwriting. Additionally, provenance and historical context can also play a role in determining authenticity. Therefore, it is recommended to seek out a reputable expert or authentication service to verify the signature. **