Celestial hemisphere:  Northern  ·  Constellation: Vulpecula (Vul)  ·  Contains:  Dumbbell nebula  ·  M 27  ·  NGC 6853
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M27 Dumbbell Nebula EdgeHD 800 Prime v. HyperStar, Gilbert Ikezaki
M27 Dumbbell Nebula EdgeHD 800 Prime v. HyperStar
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M27 Dumbbell Nebula EdgeHD 800 Prime v. HyperStar

Getting plate-solving status, please wait...
M27 Dumbbell Nebula EdgeHD 800 Prime v. HyperStar, Gilbert Ikezaki
M27 Dumbbell Nebula EdgeHD 800 Prime v. HyperStar
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M27 Dumbbell Nebula EdgeHD 800 Prime v. HyperStar

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Description

(See photo "M27 Dumbbell Nebula 8SE with HyperStar v. Prime" for background information.)

As I stated in a companion photo, these two versions of M27 should be roughly comparable because they have similar pixel scales using the same aperture. Here I bin 2x2 to get larger pixels for the slower f/10 scope. However, to get equivalent pixel scale I would have had to bin 3x3, but this camera does that terribly poorly.

The pixels at prime are smaller than the theoretical Airy disk size on sensor, the pixels using the HyperStar are larger. This picture does look sharper, but not all of it is because of the greater resolution. A lot has to do with the better guiding of an OAG, the better optics of a corrected SCT at prime as compared to a reduced SCT, and the much larger central obstruction of the Schmidt camera of the HyperStar configuration.

The larger pixel scale and longer exposures of the HyperStar photo appears to produce a much deeper photo (dimmer stars are visible). The greater dynamic range of brightness of the HyperStar picture gives a smoother, more "rich" look.

However, overall this is the better photo.

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M27 Dumbbell Nebula EdgeHD 800 Prime v. HyperStar, Gilbert Ikezaki

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