What I wanted to say is that the color of the rangefinder spot is just the natural color, without any coloring. It only appears to be pink as an optical effect to the greenish color of the viewfinder, the complementary color. The same effect appears when you look trough green Ray Ban sunglasses. The world around the glass also appears to be pink.
The viewfinder of the S2 is not similar to that of a Contax II. In fact it is a kind of Leitz SBOOI wich is placed behind a beamsplitter (two cemented prisms). That's why it is life-size.
Erik.
I still disagree. The rangefinder spot hasn't a neutral coloring.
When I look at a white wall (I mean, really white) through the S2 viewfinder, what I see in the finder is greenish (yes it's almost the same tint as the G15 Ray-Ban glass, which is very nice because it enhances the contrast of what you see) and what is in the rangefinder spot is yellow-orange.
Both when compared with the actual white of the wall paint, not when compared with each other, so, the yellow-orange tint of the rangefinder patch is neither a subjective perception relative to the greenish tint of the viewfinder nor an optical effect, but an actual yellow-orange tint.
I haven't written that the viewfinder of an S2 is similar to the one of a Contax II : I know that there is a mirrored optical unit with an etched frame in the S2 viewfinder, while there isn't in the Contax II viewfinder.
I was meaning the beamsplitter prism itself : same greenish tint and same yellow-orange rangefinder patch coming from the same assembly technology (gold plating of the two cemented sides of the prism).
The Nikon S3 has a silver cemented prism, and as a result the finder has a very neutral tint and the rangefinder patch has almost no coloring, thus it may be useful to add a blue filter in front of the finder window to get a slightly more usable rangefinder patch in low-contrast shooting conditions (see Jonmanjiro's thread about this).
I have two Nikon S2 bodies, both with excellent viewfinders, and both have the same tints, was it for the finder itself or the rangefinder patch.
Yours may have faded a bit, hence the "pink" you feel.
Bottom line : the S2 shutter isn't as loud as the F/F2 shutter. Once the camera is fitted in an half-leather case the shutter sound is on par with the S3/SP one.