Bomb Sight as observed in two bombers tried, the B29 and the Lancaster.
The first observation may be planned as such, but here it is:
1. On entering the bombardier position the scope cross hairs are not seen until you press the Z key, (Zoom). And if you are zoomed all the way out, you need to press the “zoom in" key a couple of times before the scope shroud and cross hairs appear.
2. The zoom in and out in the bomb sight scope is not smooth, but quite jerky. Especially noticed around the scope shroud edges.
Also, see the attached screen shot of the instrument panel in the Lancaster. Notice the two gauges floating out there in front of the instrument panel.