After ordering a used Yashica Mat LM (w/ Bay 1/Bay 30 hood & lens caps) from KEH today, I began wondering what others are using for medium format filters. The work will be B&W & color negative film and slides. Main goal is to shoot the Yashinon + hood w/o filters. Any suggestions or recommendations for occasional use, daylight filters? Also, I've read that some have stepped up from Bay 1 to 49mm or other sizes.