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<blockquote data-quote="Geoffc" data-source="post: 125697" data-attributes="member: 8705">For this type of thing everything should be manual. Pre focus and then turn off AF before inserting the filter. If it's not sharp without the filter it won't be with it. Set the white balance, don't&nbsp; use auto. Set the aperture and shutter in manual mode. If you take an exposure reading without the filter you can get phone apps that will tell you what to add for the filter or look on the web.Use mirror lock up if the camera supports it, otherwise use the black card trick already described.As a general point, I think your filter looks like it may have a colour cast but I may be wrong. I recently bought a ten stop B&amp;W filter for this purpose which increases exposure by 1000x. It was expensive but it's probably worth it. Cheap plastic filters will generally give a cheap plastic look, however they are good to practice with before you sink a load of cash.</blockquote>

[QUOTE="Geoffc, post: 125697, member: 8705"] For this type of thing everything should be manual. Pre focus and then turn off AF before inserting the filter. If it's not sharp without the filter it won't be with it. Set the white balance, don't use auto. Set the aperture and shutter in manual mode. If you take an exposure reading without the filter you can get phone apps that will tell you what to add for the filter or look on the web. Use mirror lock up if the camera supports it, otherwise use the black card trick already described. As a general point, I think your filter looks like it may have a colour cast but I may be wrong. I recently bought a ten stop B&W filter for this purpose which increases exposure by 1000x. It was expensive but it's probably worth it. Cheap plastic filters will generally give a cheap plastic look, however they are good to practice with before you sink a load of cash. [/QUOTE]

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