With this jack in place, you can override the Sony's default to turn off the camera. This is very useful when you are using the remote control.
The rubber eyecup comes from Orion Telescope. http://www.telescope.com/shopping/product/detailmain.jsp?itemID=170&itemType=PRODUCT&iMainCat=6&iSubCat=36&iProductID=170 /webc.exe/st_prod.html?p_prodid=22468&p_catid=804&sid=7@mDZ20-UJrQASK-42104132241.21
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