The FA*80-200/2.8 is not only expensive, but not readily available on the market. So I get the Tokina ATX 80-200/2.8 a few years ago, to fulfill my long wish to own an heavy tele-zoom.
Just a few days after I get my ATX 828, I regarded. The lens is very heavy, and I don't really have that strength to bring it out. After owning this lens a few years, I can only a few samples taken with it in my hard-drive.
To be honest, the lens is not bad. But it's not that impressive too.
On the picture quality side, the image is quite soft at f/2.8. sharpness improve at f/4, and not a big problem f/5.6 and beyond. The color is overall a bit pale. This characterist, however, make it a very good portrait lens. Thanks to the 9-blade aperture, the bokeh is also quite nice.
The ATX 828 is very well constructed. It's solid and feels like a tank. The inner focus mechanics is a very nice design, and only a small lens-group move inside the lens when it is focusing.... it's particular usful to the Pentax AF system: the camera body doesn't have to try too hard to move the lens elements, and the overall AF speed is quite nice.
My only complain is the stupid AF/MF switch of the ATX828 - at AF setting, you cannot manual focus the iens (even with the camera body set at MF). You have to switch to MF mode, which is very clumsy: you need to turn to the right position, then pull back the focusing ring. The 'right' position is different everytime, depends on where was your last MF distance. How stupid!! Imagine when you need to fine-tune the camera's AF.... IT SUCKS! Well, you can always put the focusing ring to the MF position, but then the focusing ring will turn with AF, and also slow down the AF speed. The focusing ring is very well located on the lens, and if it turns during AF, it will affect your handling of the lens.
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