I own a Yashica Mat 124g and love it. However, I don't know if there is a way to do 1/2 stop bracketing, either by moving the aperture ring between two stops, or by adjusting the ASA. I just started shooting color slide film, and it's become obvious to me that it is critical get the exposure right within 1/2 stop, so I plan on bracketing when I'm not certain. If not the Yashica, are there any other affordable/amazing TLRs that would allow me to do 1/2 stop or 1/3 stop bracketing somehow? Thanks!