MetaGuide: Eta Carinae Nebula in H-alpha, with Atik 383L+ and EdgeHD 11 with reducer on CGE-Pro
No processing other than linear stretch. No cropping. 5x10m exposures. Dithering with SGP and MetaGuide.
Automatic focus by SGP at start and after 40 minutes. Focus with Robofocus on the primary focuser.
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Eta Carinae Nebula in H-Alpha
| Imaging Optics | Celestron EdgeHD 11 with reducer at f/7 |
| Mount | Celestron CGE-Pro |
| Guiding Software | MetaGuide with dithering from SGP |
| Guiding Mode | Off-axis guiding with Hutech OAG5 |
| Imaging Camera | Atik 383L+ |
| Guiding Camera | QHY5l-ii |
| Collimation | MetaGuide |
| Focus | SGP and RoboFocus on the primary focuser - no mirror locks used - nothing manual |
| Exposure Time | 5x10m |
| Image Scale | 0.57" per pixel |
| Raw FWHM | Down to 1.4" in subs |
| Image Processing | Calibration and stack in custom software. Linear stretch in PhotoShop. No other processing or sharpening. |
| Image Acquisition | SGP |
| Other Software | PECTool, TheSkyX Pro for best guidestar selection with field of view indicator (FOVI) |
| Other Hardware | Pyxis OAG Rotator for best guidestar, Telegizmos 365 cover, Long usb cable to outside setup |
| Date | Mar. 3, 2016 |
| Filter | Astrodon 3nm H-alpha |
Field of view indicator (FOVI) used to select guidestar. Guidestar imaged with 50ms exposures at 20 frames per second in MetaGuide - guide corrections every second at low latency.
Same image but slightly sharpened in PhotoShop
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Maxim view of Ha unprocessed stack, with final fwhm around 1.4"
View showing Edge11 imaging train on CGE-Pro. Pyxis rotator dials in guidestar based on FOVI angle measured in TheSky.