The burglary took place at Old Farm Park in Milton Keynes, Buckinghamshire on 15 October.
The haul included a Canon EOS-1Ds (serial number: 608750), a Canon EOS 5D Mark III (063024021934) and a Hasselblad H4D-31 (DK41025069).
The amateur photographer also lost Canon lenses including a 24-105mm and 70-200mm, plus two Canon flash guns.
Anyone who is offered any of the stolen gear is urged to contact DC Chris Oakman at Thames Valley Police on 101, quoting crime reference number DF 4340391/13.
They can also contact Crimestoppers anonymously on 0800 555 111.