Hello, I have seen photographs by Andreas Feninger where he was using a homebuilt 4x5" camera with a long telephoto-lens and I have really come to like the compressed perspective in his photographs, where everything comes closer front-to-back.

So, I'm thinking of building something myself using a large lens in the area of 800-1000mm and basically only use it for infinity distance.

800mm on 4x5 corresponds to something like 250mm in 35-format.
Question: Will the photograph in 4x5 look as compressed as a 250mm or as a 800mm on 35-format?
/Thank you