I treated myself to an early christmas present this year and bought Peter Yanczer's book 'The mechanics of television'. A very interesting read for those planning on building a mechanical TV or camera.
For me, it filled in a lot of gaps in my knowledge. For example, I wasn't aware that srobes were used for studio lighting so as to ensure no interference with the video signal. Well worth the £22 or so.
I wasn't sure where I should post this but the 'off topic' section seemed most appropriate