I figured a few folks here might have some tips to share I only snorkel with an E-PM1 and housing (bought during the Oly blowout) and really not that often. There are times I've wanted a strobe but I simply can't justify the price for the small amount of use it will get. I ran across an Oly system chart for the E-PL5 and they listed a flash diffuser for the built in flash PTDP-EP05 and it looked like it would work well with the E-PM1 housing. This is the diffuser: Without the diffuser the built in flash is essentially useless: With the diffuser the results are pretty impressive: you can see the diffuser reflected in the monitor. I hope this saves someone a $ or two at some point.