I have the 5XB and a K-7. I carry it and 2 Ltd primes (DA 40 and DA 21) with it and it could fit at least one more (maybe two) ltds. I also carry a few memory cards cables, microfiber cloth in there (thin/flat items). I'm not familiar of the size of the F135 or FA77.
Unless all 4 of your lenses are DA ltds, I dont think they will all fit in there. I dont have a zoom yet, but I am suspecting a standard kit zoom and maybe one or two limiteds could fit. If there are two kit lenses maybe they might fit if one was attached to camera and the dividers were removed/re-arranged with one standing up. Same thing goes with your F lenses, might have to remove/rearrange divider to sqeeze in the FA77 and /or F135.
That said, the quality is top notch, and works great as a small go-to bag when you just want to take a few lenses and go out and about shooting with a light kit.
Last edited by REM; 06-16-2010 at 10:49 AM.