I have been experimenting for years with aspheric lens and other wide-angle attachments to get a wider FOV for my anamorphic lens and never had very good results. I'm happy to announce that if you are a proud owner of a Bolex 8/19/1.5x, this might be a solution you will like. I shot these yesterday. By my estimate it's a 15mm on MFT or 30mm FOV full frame. The pros are no diopters are needed and you can focus as close as 10 inches. The downside is duel focus which is very easy with this set up for me. I did have chromatic aberrations but that could have been polarizer. I need to check. It's a great solution for wide establishing shots, car shots or getting wide close ups. Only works with Bolex 8/19 an MFT users.