Contains:  Solar system body or event
Jupiter, the big red spot and Europa, Fabrizio Sitzia

Jupiter, the big red spot and Europa

Equipment

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Acquisition details

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Description

You will find hundreds of pictures like this one on the net ...but not many of them were shot with an iPhone 4 (my favorite planet cam ;-) on an 8" Dob.

The problem with iPhones, and smartphones in general, is that you have no control on the camera's gain / exposure settings!

The trick therefore is to first point the telescope to a bright, extended object, like the moon for instance.

Then you let the phone adjust to that object's brightness: You can give the iPhone a hint by touching on an area of interest on the screen!

Finally, you swing back to the planet, fine-tune the focus, and off you go...

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Jupiter, the big red spot and Europa, Fabrizio Sitzia