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Field of View

'Alopeke and Zorro have two sets of optics which allow selecting between "Speckle" mode and "Wide-Field" mode. Both modes slightly underfill the detector resulting in circular fields-of-view.

The diameter of the unvignetted wide-field is ~35" (~60" diameter with vignetting). See the vignetting maps in the following table where contours have been overplotted at 10% vignetting intervals, and the green box indicates the size of the 512x512 ROI.

Speckle Wide-Field
Field of View 6.7" 60"
Camera Blue Red Blue Red
'Alopeke Pixel Size 0.00992" 0.01095" ~0.0725"
Zorro Pixel Size 0.00991" 0.01093" ~0.0725"
'Alopeke Vignetting
Zorro Vignetting
Speckle mode Wide-Field mode
Capability | Gemini Observatory


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