It's a converted full-spectrum E-M1 Mark I from Lifepixel. I do use various filters, but right now I favor the Blue+IR filter from Lifepixel on it. I just ordered second one in 37mm size too for that lens as I was using a larger 72mm one and stepping it down or up as needed fo whatever lens I was trying like faster f/1.2-2.0 primes. I like the smaller size of the E-M1 with the 14-42mm f/3.5-5.6 EZ zoom lens that seems to be permanent on it now.Are you using a lens filter? How did you use such a fast shutter speed. Mine takes a one-minute exposure.