He used a Cannon 60Da camera with a Baader Vario Finder as a lens.The exposure was 1/8 second with an ISO selection of 800 and an f stop of 4.1.It is possible to use the grating visually – the Rainbow Optics version came with a ‘cylindrical lens’ that smears out the narrow spectrum of a typical star laterally thus making it easier to see.But only bright stars (1st/2nd magnitude) show the details in their spectrum easily.I’m concentrating on low resolution spectroscopy here.
The slower your shutter speed, the more pronounced these negative effects are going to be.
The best we amateur astronomers can hope for is a star-like image. Usually, the average backyard imager will only be drawn to image a rare occurrence, such as a near-Earth asteroid passing close to our planet.
These small chunks of spacerock are still seen only as pinpoints, but their rapid motion against the background of distant stars makes it possible to show motion in outer space.
amateur photographers, but there's really no need to look like a complete amateur when we pick up and point our SLR or DSLR to get a shot.
Holding your SLR properly, while not making it totally obvious that you are not a pro, also has a lot of advantages. For starters, holding a camera at both sides of the body like the picture below is usually a dead give away that you don't know what you are doing.