ISS - Cupola Module

The Cupola module above is the ISS earth observatory.

 https://storyful.s3.amazonaws.com/production/ci_images/1697/_47254659_cupola_iss_466-original.gif

Each window is no more than a few feet wide.

Here's a picture of ISS above the earth:

https://apod.nasa.gov/apod/image/0803/iss_sts122_big.jpg
One can imagine how little earth you should be able to see in a few small windows.

http://www.spaceflightinsider.com/wp-content/uploads/2013/12/iss036e0297641.jpg

Above is a normal lens shot.

http://voices.nationalgeographic.com/files/2010/06/soichi-cupola-earth.jpg

That is what they claim happens when a fish eye lens is placed on the Cupola. Fish eye pulls the outside towards the center. Apparently, their magic fish eye, has the ability to pull the entire land mass into a uniform globe.

Yet, here is another fish eye lens image:

https://www.nasa.gov/sites/default/files/thumbnails/image/624673main_cupploa_xl.jpg

Which is totally different, including altitude.

Not sure what to think of this, but having hard time agreeing with plausibility.