I love this camera! Its a classic point and shoot, you can’t control it because there are no camera controls. Lens filters and film ISO combinations are the only things that can affect exposure but I think it is best to leave it alone and have fun with the mystery aspect of shooting film.
I shot a roll of Kodak Ektar 100 since I’m not even sure if my camera works. The aperture is f/15 and shutter of 1/40th so It needs plenty of light. I did try and experimented with long exposures with some degree of success. The shutter needs subtlety when pressing. I consider myself quite decent with handholding cameras with low shutter speeds but the Brownie’s shutter snaps when pressed which adds plenty of shake. No tripod mount also so i might have to DYI some GoPro adhesive plates. Heres a roll of 120 film untouched straight from scanner to Aperture for Jpeg conversions. The second and third photos are long exposure, 2 and 4vseconds each if I remember correctly.