Before I acquire a F3, I thought RTS II has a really nice finder, but I was wrong! The standard DE-2 finder is so great and there's nothing I've seen even close to it. My only complains with F3 are about the exposure compensation and lock, as stated before.


In comparison with Contax RTS II, I like F3 better, here's why:


Bright (not to mention 100% coverage) and fast-to-focus finder; it's also interchangeable. DW-3 Waist Level Finder is a worthy addition for those who like to do street photography, but I wouldn't recommend the DA-2 Action Finder unless it serves your purpose- it's heavy and makes the balance a little bit weird without MD-4 attached to your camera.


Lots of interchangeable focus screens. They are also extremely easy to change, you only need your fingers, no tools required.


Super build quality, mine works fine, but both of my RTS II have one or two problems.


Better ergonomics. It's easier to hold.


Smooth and effortless film advance mechanism.


Steeples shutter speed in aperture priority mode.


80/20 center-weighed metering (against 60/40 in RTS II) is more useful in my opinion.


Dedicated multiple exposure leveler.


Motor drive MD-4 is big, but when mounted, it can power the camera (180 rolls with alkaline-manganese battery), which is W-3 can't (the big W-6 can). MD-4 also fires up to 3.8 fps (V.S. W-3's 3 fps) with manganese battery and 5.5 fps if you can find the original Ni-Cd rechargeable battery. Although MD-4 doesn't have a vertical release button, you could find the MK-1 Firing Speed Converter that will give you the button, along with the capability to choose continuous shooting speed.


MF-18 data back is useful, since it can imprint data 'between' the frames and also automatically stops the winder when rewinding to leave the film lead out. I found the LOW (ISO) setting for Detla 400 is too strong, and you should use HIGH with Deta 400 @ both ISO 400 and ISO 800.