I observed this galaxy pair tonight with my 20" dob from the Rio Hurtado valley in Chile.

NGC 1531: At 83x and 320x a small oval with a brighter center with the major axis pointing at NGC 1532.
NGC 1532: At 83x a thin galaxy with a stellar center. At 320x a long, thin smear with a stellar core and a dark lane running through it. On one end there is a thin bright lane in the galaxy. Occasionally a very faint smudge is visible next to the core.