This is a tamron 28-200mm 1: 3.8-5.6 lens It has a Canon mount. I loved it on my 40d dslr, but it started to cause a lens error. Usually taking it off the camera, switching the camera off and on would reset it. Also if you go manual you can use the lens without the aperture if you put tape over the connections as there will be no errors. It does not come with lenscaps, filters etc. Im not aware of fungus or dust inside. If you want to play with it come and check it out. They are about $200 used on certain online websites I just upgraded to another zoom lens, time to make space