Compare a photograph above. The both photograph took railway vehicles of the same type of the toubu-railway-company.

Photo1 took the train to pass separately more than 30 meters from the track. Photo2 took a passage train separately by about 5 meters from the home at the station.

Photo1 is　taking a vehicle using the 135 millimeter lens(telescope angle). Photo2 is taking a vehicle using the 25 millimeter lens(wide angle).

Photo1 attracts a vehicle from the distance ,whereas photo2 is appeared as the body of the train overhunged in front.

This difference occurred with the difference of the lens to have used for photography. This reason is explained by the following graph.

The width of the railway vehicle supposes 2.8 meters. This width is as follows on the film with the lens to use. When using a 135 millimeter lens　：The length on the film　（+-0.7ｍｍ） When using a 25 millimeter lens　：The length on the film　（+-8.5ｍｍ）

The image becames indistinctly as that this length on the film is big. Therefore, to take railway vehicle clearly, it should use a lens with long focus distance.