Sony NEX-VG20 Operating Manual page 29

If the image is not clear in the viewfinder
If you cannot see the picture in the viewfinder clearly under bright circumstances, use the
supplied large eyecup. To attach the large eyecup, stretch it slightly and align it with the
eyecup groove in the viewfinder. You can attach the large eyecup facing either the right or left
side.
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Notes
Do not remove the pre-attached eyecup.
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Large eyecup (supplied)
Attach the projection to be
straight.
US