I heard someone say there was no time stamps on the photo comparisons so Trumps could have been taken earlier then Obama’s.
The BBC had a time stamp that shows it at 11:20 a.m. Washington DC time. That is 25 minutes before Trump was sworn in.
http://www.freerepublic.com/focus/f-chat/3516243/posts
link above shows twitter posting that compares 2017 and 2009 - note time of twitter posting
(scroll down, it's in post #24) This is interactive version taken while Trump was actually speaking.
http://www.cnn.com/interactive/2017/01/politics/trump-inauguration-gigapixel/
I was watching this on TV starting at about 6:30am CST on Fox and the pic being shown as Trump’s looks just like the one I saw at about 7:00am. The commentator was saying “It looks like the crowd is starting to gather and there are many mingling around as they search for a good spot”. Now I wish I had recorded it. The MSM is so dishonest.
The original digital photos would have EXIF data encoded that would detail date and time, exposure parameters and in some cases the photographer’s name and GPS data.