Eyepiece Simulations |
Planetary Nebula M-27 "Dumbbell" (NGC-6853)
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ABOUT THE IMAGES:PICTURE NO. 1 (middle): The "Dumbbell" as seen in an 8" or larger-aperture telescope, in moderately-dark skies, with about 75X magnification. The bi-nuclear shape is clearly detected, but the contrast is low. PICTURE NO. 2 (right): A contrast-enhanced view under the same conditions above, with the addition of an oxygen-nebular-line filter, increasing the contrast of the doubly-ionized oxygen wavelengths by reducing skyglow and scattered light-pollution. The oxygen and hydrogen-line filters are effective in enhancing views of M-27, especially in suburban skies, when the correct eyepiece exit pupil range is utilized. PICTURE NO. 3 (left): was processed from a color image taken by Ron Wood, at prime-focus of his 8" f/5.2 Newtonian, utilizing gas-hypered Kodak Ektapress 1600 film, and a 40-minute exposure. |
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