However, what the images do show is that none of the schematics ever produced - above, from the Encyclopaedia, below, from various technical articles in magazines - actually match the weapon prop! The emitter head is shown as continuous with the phaser body, yet screen caps reveal there's a visible lip making the emitter smaller in diameter than the body. Watching the episodes now, the dustbuster phaser doesn't seem so bad as it's cracked up to be.

What the images below do reveal is how unergonomic the phaser is. Look at some of the angles of the beams and how they correspond to the angle the phaser is being held at - in one or two scenes the beam goes all over the place! It's a problem that continued with the 'cobra' phaser which replaced this model, and only the curvier 'boomerang' phaser seems to have improved matters. Schematic