Just as a test, more to position the object in my viewfinder using high ISO and LiveTime (brilliant for astro work), I took this shot of the Eta Carinae nebula last night with my OM-D through a Takahashi 90mm fluorite apochromatic refractor. As soon as I had it positioned, I was going to continue with low ISO subs to collect data. The clouds rolled in. Boom. Nada. Oh well, this image shows that the sensitivity is good, although it blows out a little with chromatic aberration on bright stars at this high ISO. I'll have to wait for another night now to try again when it's clear out. Olympus OM-D & Takahashi Sky90 Apochromatic refracting telescope on Losmandy G11 equatorial mount guided by a Takahashi FS-60C and QHY5/PHD.