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Message: <blockquote data-quote="STM" data-source="post: 125625" data-attributes="member: 12827"><p>One common them I saw with the images is they were lacking in contrast. When you have exposures that long, sometimes it is best to use a little trick I learned a long time ago. If you have the ability to lock the shutter open on B, you can place a black card (flat black si best) in front of the lens, open the shutter and remove the card. You don't have to be super precise, you can use a stopwatch or just the second hand on a watch. When the time runs out, place the card over the lens and release the shutter. This will all but eliminate any unsharpness due to mirror slap or even the shutter opening.</p></blockquote><p></p>