I have a pentex k1000 camera with a tamron ae 28-80 and ae70-210mm lens. They have pentex mounts on them. Are these lenses adaptable to todays autofocus cameras like the canon eos or pentex k100

Tamron makes their lenses with a variety of camera mounts. If the lens has a Canon mount then it will work fine on your T3i. If it has another mount then it will need an adapter, and you will lose some functionality (probably autofocus and autoexposure).

Tamron makes their lenses with a variety of lens mounts. If your lens has a Nikon mount then it will mount onto the D90.

What mount do you have on the Tamron lens? (The built-in mount.) If it has a Nikon mount, you don't need an adapter at all. If it has the Adaptall mount then the adapter should fit onto the back of the lens, then the combo should fit onto your Nikon camera. If the lens has a different mount then nothing you can do will make it fit.

Does the adapter fit onto the lens?

That depends on the lens mount. Tamron makes lenses for a variety of cameras. If it has a Nikon mount, it fits onto the N2020 just like a Nikon lens. If it has, say, a Canon mount, then it won't fit at all.

you need a proper t2 adapter. when you remove the m42 adaptor on tair lens, you can attach the proper t2 to nikon adaptor on it. check my tair 300 photo. it has "t2 to m42" adapter on it. please be sure that find the correct adapter. i bought several adapters to find the correct one. one of them was different than t2 adapter but looking alike and sold as t2 by seller. it is hard to find the correct adapter. i guess there are variants of that standard(which is odd).

Tamron makes their lenses with a variety of mounts. A lens with a Canon mount, for example, will not fit a Nikon. Assuming the lens has a Nikon mount then yes, it is compatible with the D60. However, the D60 lacks an autofocus motor, relying on the lens to have one. Some Tamron lenses have such a motor, some do not. Such lenses will not autofocus with the D60, but everything else still works, including manual focus.

Tamron makes their lenses with a variety of mounts, to fit a variety of cameras. Assuming you get a lens with a Sony mount, then it will work. A Tamron lens with a Nikon mount, for example, will not fit a Sony camera.

Camera offers differ from country to country, so unless you can specify the offer in particular no one can tell you which is better. However, in general a single wide-range zoom such as the 18-270 will not be quite as sharp as two separate, shorter-range zooms, such as an 18-55 and a 55-200. But one lens will usually be lighter than two lenses, so you have to carry less. Also, you won't have to waste time changing lenses. It's a trade-off, and only you can decide which factors are more important to YOU. And, of course, you have to consider the cost and factor that into your decision.

Tamron makes lenses with a variety of mounts. A lens with a Canon mount, for example, will not fit onto a Nikon camera. Assuming you have the lens with a Nikon mount, it will work fine on the D3000. Be aware that the D000's smaller sensor will make the lens appear as a 42-300mm lens would on a 35mm film camera.

Tamron makes their lenses available with a variety of mounts. A lens with a Canon mount will fit Canon cameras but not Nikon cameras. A lens with a Nikon mount will fit Nikon cameras but not Canon cameras. As long as you buy a lens with a Canon mount, you shouldn't have any problems.

You can have the 28-300 temron lens with beynout mount of pentax it will deffinaitly works like another lens manually , because af lens has a option of manual also so it will be suitable