|Flaming Star Nebula; Canon Rebel T3 (1100D), ST80 on Vixen SP mount; 10x120 at ISO-6400|
Another advantage of the new camera is that it will take exposures at ISO-3200 and ISO-6400, unlike the old camera that only went up to ISO-1600.
As those of you who keep up with this blog already know, I use an Orion ShortTube 80 on an old Vixen Super Polaris mount when I view and image from home. The Super Polaris is a great little mount, but it does not have autoguiding or any kind of fancy computer control, like GOTO. The polar alignment scope is out of date (it was probably made in the mid-80s), so I have to estimate where to place Polaris in the reticle. As a result, the best I can usually get out of it are 3-minute exposures. Therefore, I figure that the higher ISO and lower noise of the T3 will help me capture more detail.
Here is a portion a single shot from the run that was used to produce the image above. I limited the exposure time to two minutes because the light pollution was swamping the nebula at higher exposures.
|Two-minute exposure at ISO-6400. The nebula is barely visible, but can be separated from the relatively even noise.|
|Three-minute exposure at ISO-1600 of Messier 101.|