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Message: <blockquote data-quote="hark" data-source="post: 376731" data-attributes="member: 13196">The photo looks to be overexposed. Did you calculate what shutter speed to use, or did you aim for 30 seconds because that is what you wanted to use? The filter you used is a 9-stop ND filter, and you say you used a shutter speed of 30 seconds. Working backwards, and if I am figuring this out correctly, your starting shutter speed before placing the the filter on the camera would have been 1/15" IF the exposure was determined correctly. What is the EXIF data from the photo? I'm guessing this was taken during the daytime...yes? If so, the starting shutter speed most likely was faster than 1/15" and that would indicate you overexposed. To use an ND filter, you need to determine the actual shutter speed WITHOUT the filter first. Then you need to calculate the exposure to compensate for the 9-stops of light loss difference. There are smart phone apps for that. You should be able to darken this photo using some type of post processing software. Please understand I am not being critical of what you did, Awhat. I just want you to understand how to use an ND filter correctly. Even though it is overexposed, I still give you an A+ for effort. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink    ;)" loading="lazy" data-shortname=";)" />  Please let us know the EXIF data. In the properties section of the image, you will find the aperture, ISO, and shutter speed used. Plus the approximate time of day the photo was taken would help, too. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" /></blockquote>

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