Deep Space Objects
You use an entirely different approach to astrophotography when you want to capture images of objects further away and way and out of the range of the naked eye. The Great Orion Nebulae is one of the more famous of these objects.
Deep sky objects logically are very faint as they are much further away than the planets. This means that the light sensors will need to collect information over a much longer period of time time before the celestial object will be able to be seen in a photograph. This can be difficult with point-and-shoot cameras as the maximum exposure time is 60 seconds. The DSLR camera will be better suited for gathering images of these deep sky objects. This is a sign of a very serious hobby, indeed.
The beginner should not despair or go into serious debt at this level. There are plenty of celestial objects that can be photographed successfully using the point-and-shoot camera and eye-piece projection techniques. You will need to be sure to have a guidescope or off-axis guider, as explained earlier, that uses a GPS technology to keep an image in the center of the eyepiece of a long time thus letting you apply some more sophisticated imaging techniques.
Insight into Low-cost, Non-technical Methods for Celestial Objects at Great Distances-
You will have to find a location for this effort that has as dark a sky as possible. This will give you the best chance for getting a photograph of these fainter or deep sky objects as there will be some contrast to work with between the dark sky and the celestial object. One trick is to use the New Moon phase when the sky is naturally darkest. If you live in an area with high light pollution, you might want to find a friend or vacation spot with darker skies.
Once you have a good location, you use your telescope with the camera attached to the eyepiece. When you have found the location of the celestial object you were looking for, and focused it and set the tracking, you tehn will go an .adjust the cameras settings as described below. This will give you the best light-gathering options
• Sensitivity – ISO 400, SHQ (Super High Quality) setting, Macro or Infinity setting,
• Exposure range – 60 seconds,
• Aperture – f2.8 or lower.
• Set self-timer for a ten second delay to avoid any camera shaking possibilities
• Optional: Add a Barlow lens to the eyepiece in front of the camera. This lens only works with the brighter objects as it doubles the magnification of any eyepiece attached to the telescope. It will just make the fainter objects dimmer.
The two primary challenges of deep sky imaging with eyepiece projection:
“star trailing” and “vignetting.”
Related posts:
Recent Comments