Originally posted by Jonathan Mac I don't have an SFX but I have three SFXns and I believe the only significant difference is that the n has a top shutter speed of 1/4000s and the older SFX has a top speed of 1/2000s.
I like the camera a lot. It's got the fastest maximum shutter speed of any of my Pentaxes, the body is chunky and feels great in the hand (possibly only if you have large hands) and the viewfinder's very good for an AF camera. There are no optical focusing aids in the but it's big and bright enough that focusing is fairly easy and focus confirmation works well. I rarely use mine with AF lenses as AF is very noisy.
The way around the expensive battery problem is to hunt down one of the rare AA battery grips which screw on in place of the standard lithium grip. This makes the camera bigger and heavier but to be honest, it's not a camera to use when you want small or light anyway. It took me several months to find one of the grips and I don't see any just now on ebay.
The 1/4000th second speed would be nice to have, though the SFX's 1/2000th is pretty high for a film slr in my experience.
Since I found the battery pretty cheap on line, probably a fraction of what it would cost at a store, I'm not in a big rush to find one of those aa battery grips. The aa grip would add versatility, off course, so I probably will watch for one.
I've read that the SFX shutter and built-in winder are fairly noisy, so I'm not very worried about added noise from af lenses. But since I only have 2 lenses with working AF, I will mostly be using the camera with manual focus lenses.
I don't expect the weight to bother me. I'm sure I have heavier cameras, and the only lens that ever struck me as possibly too heavy, after using it for a while, is an old 400mm f/6.3 Lentar, definitely a tripod-only lens.