Thanks Andreas for the exceptionally informative and accurate description of the 56mm FL view and comparison to the SLC. I have both in 10x56 and you are spot on. Only thing I’ll add is - the FL is an absolute glare-crusher and is my go-to to view waders and waterfowl on sunny days; gray and gloomy days have me reaching for the SLC as in that kind of light I find its view a smidge more pleasing and colors more saturated.The 56 binoculars are big and heavy, but I use them often (also Swarovski SLC 8/15x56) and can carry them over several kilometers without any problems.
Basically, I always carry binoculars over my shoulder on long journeys, I don't like it that much when something is dangling from my neck.
The outstanding optical quality of the 10x56 is the axis sharpness, I have compared it to many other binoculars and the FL is always at the top.
The next point is that it has practically no chromatic aberrations, which is what the FL series is also known for. The FL 10x56 shows itself to be extremely rich in contrast in the star sky, color differences that are hardly recognizable in other binoculars are clearly visible in the FL.
Another positive point is the very good stray light suppression, it is also at the top in this discipline.
The SLC 10x56 has slightly different advantages, it is a little better balanced in hand, the viewing behavior is more forgiving, the color balance is a little more neutral and the edge sharpness is better, with the other optical features I would give the FL a very slight preference.
Andreas
My 8x32FL still brings a warm, contented smile - I use it a bit less now due to the superb handling of my SFL, but it is a timeless and incredibly useful design. In fact, just a few days ago I ran into an couple sporting 7x42 and 8x32FLs. They let me check our the 7x42FLs and I found it quite impressive - lovely image, especially considering the age of the design. This started a tickle in my mind about picking up a set.