wilis, yes. But the guide not on the comet's core, is on star. Luckily the comet move not that fast with the image scale of my imaging system, that's why still can capture the comet and not become trail.
Carl Zeiss 2,8/25; Nikkor FishEye 16/2.8, 35/1.4, 50/1.4 Lens with Nikon F2 Camera record the scene of stars in the sky ! Beauty under the idea of View, not rely on the equipment and electrical CCD executive progress!