The FA 43 is a great lens (and in fact a great documentary lens), and would be a great choice for trip photography. It is also solidly built... BUT, it is definitely not weather sealed. There is no gasket at the lens mount, and dust will definitely penetrate there over time and so will moisture - this can affect the camera as well as the lens, even if the camera is weather sealed like the K5. Likewise, the lens is not internally focusing, so dust and moisture can also penetrate the lens barrel as the barrel moves. How much dust/moisture accumulates and how fast it accumulates will depend on the conditions to which you expose the lens.
|