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Olivier Biot
Amused
Reged: 04/25/05
Posts: 14557
Loc: 51°N (Belgium)
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Share your DSO observing techniques
07/13/08 08:18 AM
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How about sharing some DSO observing techniques?
Let's start with the easiest technique: averted vision.
Technique: averted vision
Applicable to: all deep-sky objects
Ease: very easy
Effect: significant to dramatic improvement
Equipment: none
Averted vision is a visual observing technique that makes use of the fact that our eyes are not as sensitive to light where we see the best detail. When looking directly at an object, more detail can be seen, but when looking a bit away from the target you trade in resolving power for brightness. Every eye being different, the direction in which you have to look for perceiving this brightening at best is different. To find it, roll your eyes while observing a DSO - a bright globular usually shows a very dramatic improvement.
The technique of averted vision is the most widely used technique for observing faint targets. It can be used in combination with virtually every other visual observing technique.
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Tal-200K (#199) with JMI NGF-Mini2M focuser on GEM3 • Astro-Tech AT80ED on Orion Sirius EQ-G with EQDIR & home made wireless EQDIRECT • Celestron Regal LX 8x42 & 10x42 • Helios 15x70
ATM 14" f/5 (designing mirror cell and filter wheel/focuser) • ATM 10" f/6 Portable Truss (polishing) • ATM 10" f/25 Dall-Kirkham (primary: polishing, secondary: #120 grit)
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