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Old 29-03-2018, 07:42 PM
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NorthernLight (Max)
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NorthernLight is offline
 
Join Date: Sep 2008
Location: Auckland, NZ
Posts: 343
Hi Martin,

An aspect ratio of 1:1 means that your camera is producing a square image from a rectangular sensor. This is achieved by using the full height but cutting strips either side off.
For planetary work, you don't need the full width of your sensor (as long as you are centred on the planet). The planet is so small that likely even the remaining portion of your sensor in 1:1 mode is huge in comparison to the tiny disc image.
Having an image with less data makes post processsing easier and also helps dealing with gradients etc. as the sample space is reduced.
The benefits for going 1:1 are mainly a reduced set of data that still contains all of your desired planet data. There is nothing wrong with shooting in any other aspect ratio mode really as long as you are mainting the highest resolution. Your just saving and post processing a whole lot of additional data (mainly background sky) is probably not relevant to your final image.

Cheers,
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