Chinon lenses are either M42, 'Pentax screw.' which can fit any digital body with the relevant adapter, or Pentax K bayonet which will fit Pentax or (most) Samsung SLRs. NB they will only meter stopped down to the taking aperture, and offer neither autofocus nor shutter priority/programmed modes. There is also the fact that film SLR lenses need longer focal lengths than their digital cousins due to the sensor being smaller, thus a 50mm standard lens for film is a short telephoto for digital.
Pentax is not a certain type of photography, but is actually a company that makes high quality cameras and camera lenses. Pentax camera users are typically professional photographers or are very serious about photography. There are several Pentax gallery communities that host archives of photos that fit into all types of categories.
Pentax screwmount lenses (M42) will fit differently branded cameras with the same mount. It will easily fit other camera mounts including digital bodies using a cheap adapter. Just make sure you use the correct version of the adapter that focuses correctly to infinity. With Pentax K-mount lenses, there are existing adapters that will mount these to a four/thirds system camera, the Canon EF EOS, the Minolta MA or Sony Alpha and the Leica M39 screw mount. Take note that in most digital bodies, the lens can only be used at manual mode. Some camera models will not meter through it even at stop down. Pentax dSLR bodies will meter through them and add Shake Reduction and focus confirmation even if the lens is full manual.
Some Olympus camera lenses fit other cameras and some only fit Olympus cameras. They have a number of lenses that fit the micro four-thirds mounting.
Most lenses and mounts are proprietary so no Canon lens would fit a Pentax without some kind of adaptor.
Pentax K-mount lenses. http://en.wikipedia.org/wiki/Pentax_K_mount#List_of_Lenses_with_any_K-Mount_Variant
Yes. Canon EOS film cameras uses EF-mount lenses. All Canon EOS Digital cameras will also accept EF-mount lenses.
Digital SLR referes to "digital single-lens reflex." This terminology is often used when speaking about cameras. Such cameras can allow the photographer to change lenses as he or she sees fit.
the T70 uses an FD lense, which cannot be fitted onto the new range of canon digital SLR cameras which use EF and EF-1 lenses
nope
http://en.wikipedia.org/wiki/Pentax_K_mount#Cameras
No, unless you make an adapter for it. Surprisingly, the Nikon bayonet lens will fit the Pentax K body. Only loosely. Infinity is incorrect but if you handle it carefully, you can take a picture with it.