Yea, though about that - to be precise, I've thought about threaded circular thing'ie (in the place, where mugen cover have just useless rectangular hole for camera), that one could use to screw a mini lens (objective lens), allowing optical zoom. The problem is, that I'm not aware of any "standardized" lenses of that size, so I could put a proper, general purpose thread - most of things I've seen are either overpriced iPhone toys (most likely, attached by magnet) with super-poor optics quality, or ridiculously overpriced things, that still produce visible circle in frame.

OTOH, if you talk about regular-size camera lenses, it's quite hard to do feasibly, as N900's camera is at far left side of device. Thus, to mount it securely, one would need parts that extend much further to the left, that device body itself.

This thing looks like rather a project for special, attachable "mount-kit", than something one could bundle into body for everyday use. One of main goals of body replacement project is to provide superior-in-features body, that still is perfectly mobile (not much bigger than N90 0with mugen cover), when no external things are attached... Transforming into a feature behemot station, when all add-ons (external antennas & co) are connected

Not too much, sadly. Enough IR light goes through, if you light a diode directly into a sensor, but to see anything *illuminated* by IR (so, light is deflected by some object, back into N900's camera sensor), you need filter removed. Otherwise, even IR lamp from de-mobilized tank (seriously) doesn't illuminate well enough

/Estel