Shooting the original Enterprise model.
The principal one we had was the large, full scale model that Dick Datin built for us. And that was about eleven foot from tip to tip. The dome itself was probably about five foot across.
The only other model that we had in those first two years of pilots was a little one that Matt Jefferies made that was about four or five inches long that was just a very simple, straight-forward model. We used that first before we ever finished the big model to do some shots - run-bys, to get speed and those test shots, two years lat were used in the main title.
When we shot the little model, we were able to do that in a clean run on a lathe bed that we had built. But nearly all of the work that we did, all of the photography work that we did on the Enterprise was stop-motion work. The Enterprise was stationary and the camera moved in.