Yes unproccessed, I usually shoot UV and IR with this lens. Yes F5.6 is better to shoot at than F4. For closeups though I would normally shoot to F11.
Here is a better example shot at F11 on Fujifilm S5 camera with a little sharpening taken this past summer when it as warmer (not -30 with windchill as it was today) and the sun higher in the sky
Although not a normal picture this is a UV light only filtered (Filter used UG 11x)shot of a dandelion at F4 on Fujifilm S3 UV/IR camera.
