Complex sentence: In 1985 Minolta came out with their first Auto-Focus cameras with the Maxxum/Alpha/Dynax series of cameras, this meant that further research and development of manual-focus 35mm SLR cameras was shelved.
Split into simpler sentences: In 1985 Minolta came out with their first autofocus cameras with the Maxxum/Alpha/Dynax series of cameras. This meant that further research and development of manual-focus 35mm SLR cameras was shelved.