ND flashing

sammich

New member
My XF300 has flashing ND light in the viewfinder during filming, even though the iris is at f10 and shutter at 1/250 (or similar). In other words, there is no need for a neutral density filter to be selected since there is plenty of room for both the shutter and iris to adjust without it. Exposures are correct (regular "sunny 16" sort of day with neutral tones - greens, browns, etc.) even though this light is flashing. I've tried it in all modes, but the flashing ND indicators are on in all except total shade or indoors. Does anyone know if I have something set up wrong (I've "reset" to default several times). Does anyone else have this problem? Any ideas on a fix?

The manual says that if the light is flashing to select the indicated ND filter setting. True enough, it opens the iris more (from f10 to f4.5, for instance), but since the exposure is correct already when at f10 there is no need for the ND filter at all (even though the flashing would indicate such).
 
I'm no lens expert, but I'm pretty sure an f10 is not the optimal setting for this camera. I believe the lens should be kept between f2 - f8 for the best images. f8 is probably pushing it.
 
Diffraction just starts setting in after f/6.2 on the XF3xx camcorders (which in and of itself is pretty amazing), and by f/8 it will make your picture noticeably softer. That's why it's telling you to put on an ND filter - to protect you from ruining your own video and coming on to forums to complain about why your camera makes fuzzy pictures :)

happy shooting!
 
Ah, so it is a diffraction light. The manual claims this to be a problem for settings above f10. In my past ND filters were for exposure beyond the camera's capabilities (f-stop and shutter speed). I'm new to this, so sorry for the stupid questions. The videos looked plenty sharp to me (but my eyes are going bad, so who knows). Seems best to keep the iris in manual and just watch the shutter in auto or manual, too. I'm assuming nobody uses it in full auto.
 
I keep my shutter at 180 degrees and have my iris on manual at all times. Use the nd filters for large-measure light control, and the iris for fine-tuning. Just try not to go to f8 or smaller with the iris and you should be fine!
 
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