colinc1 Loc: Goleta, California

I have a 67mm filter for photographing the sun. The filter size on my Sony RX10 4 is 72mm. I have adapter rings but when I get everything hooked up the filter has the "shiny" side out. Is this OK and will the filter work this way?
Any advice would be appreciated.

wdross Loc: Castle Rock, Colorado

It should still work as long as the filter is in front of the lens. There may be some very slight differences in transmission (less light), but I even doubt that. It should still cut the light level to the proper level for photography as long as it runs ND16 to ND20. Do not use the filter to view the eclipse with your eye if the filter is not a polymer based sandwich construction. It will cut down the light level but will not cut the UV level enough to prevent eye damage. Such a filter, if not blocking UV rays on an mirrored camera with a telephoto lens, will cause UV eye damage to occur even quicker. And the vision damage will not show up right away. The damage will show itself the next day and is not really reversible. Obviously mirrorless cameras to not have that same danger.

Having used Thousand Oaks Optical before, an e-mail to them will confirm any and all information. I suspect the filter will be a polymer based material sandwiched between two pieces of glass and safe for camera and eyes. If not polymer based, it may be good for camera only. I can garenttee Thousand Oaks Optical will know if their filter is passing dangerous UV rays.

colinc1 Loc: Goleta, California

I called TO Optical and the tech told me the shiny side should face the sun with the black side to the camera. Did not inquire about UV rays.