Frankos

I too love the 55-200, but never used it in rainy conditions. Every time I am amazed about its sharpness and the image stabilization is a big advantage. One of my other lenses was the 18-55, but after I dropped it during vacation I later replaced it with the weather sealed 16-55 f2.8. This lens is bigger and heavier but the IQ is very good. I agree with the others, the 16-55 2.8 is an excellent landscape lens. Recently I tend to make more use my primes (14 f2.8, 23 f2 and 35 f2) for landscapes and leave the heavy 16-55 at home.

Hmmm...sounds reasonable Vidalgo. The center of the lens is optically the best. But the rectangle's edges (the short edges) are further away from the center than the square edges. So quality of is edges in case of square format will probably better then the right and left edge of the rectangle format. But building a bigger sensor is expensive and maybe not worthwhile.

When you make square pictures (ratio 1:1) with the Fuji X-T1, only a part of the sensor will be used. Why does Fuji not make the sensor bigger (higher)? You can still use the same lenses but the quality of square pictures will increase.