With physical objects it is more difficult to argue breach of copyright - especially if an open license is applied by photographer. Rules vary by jurisdiction - also Freedom of Panorama need s to be considered.

However proposed changes to UK copyright law will soon mean that you may need to take out a license to photograph classic designer objects even if you own them. Enterprise and Regulatory Reform Act 2013,

http://arstechnica.co.uk/tech-policy/2015/12/you-may-soon-need-a-licence-to-take-photos-of-that-classic-designer-chair-you-bought/

Paintings & Artwork

Many Museum and Galleries are adopting a relaxed or open attitude to photographing artworks. Although many are using cameraphones - these are now producing higher quality images often 4000x Pixels. Much of the Museum guidance is unclear or missing, usually no more than personal use. The following two links discuss this further

Must You Pay to Use Photos of Public Domain Artworks? No, Says a Legal Expert

http://www.huffingtonpost.com/bernard-starr/museum-paintings-copyright_b_1867076.html

Legal Pitfalls in Taking or Using Photographs of Copyright Material,

Trademarks and People WIPO

http://www.wipo.int/export/sites/www/sme/en/documents/pdf/ip_photography.pdf

OPEN IMAGES