I know Daniel doesn't like the Silver look but I have to admit a little ego messaging. That big Pentax logo on the hood is fun to have around other C/N shooters and the untrained casual observer thinks it's worth the cost of a down-payment on a house. I've had lots of comments with it.
But the real reason (the above is just fun bonus points) is the very nice balance on the camera, second to none optical quality and exceptionally fast focus and accurate for an AF lens that is f4.5. It also will MF focus very well when using a TC. Bright and clear in the VF with a smooth well damped focus ring. The MF/AF clutch is nice as well. A lens hood that took an engineer to design with a velvet inner lining to absorb diffused light.
The thing is a pure joy to use. It totally stopped my LBA the day it arrived (well at least for a few months). After using it for a few days, I sold my Bigma and have not missed it one bit. Stacked with a 1.7 and 1.4 TC I can get 715mm out of it and still a good image. But at either 420mm or 510mm with either TC it will outperform the Bigma.
What's not to like about this old classic? Look at all the threads about how a Tak whatever performs better now than it did 35 ears ago. Same goes for this wonderful lens.
Taken with the 2 TC's at 714mm (handheld as well)