I'd try a tripod-mounted camera, with the self-timer set to 10-second delay, and an exposure time that is around 2 seconds. Sometimes a camera/lens/tripod setup will show some minor vibration issues at "instantaneous" exposure times, such as 1/30 second down to as slow as say 1/4 second...but LONGER times, like 1 to 5 seconds, yield sharper images. If you have say, a very lightweight tripod, it is possible for the mirror slap on the mirror-up cycle, then the immediate slap of the first shutter curtain opening, can cause oscillation and thus slight, slight camera movement, which in "instantaneous" exposures, can last for much of the duration of the exposure, causing unsharp images.
In a longer exposure, say from 1 second to 5 seconds, the mirror goes up, the first curtain opens, and then the vibration starts, but it STOPS fairly early in the overall length of the exposure, and so, it's possible to get sharper images with a longer speed, than with a faster speed, especially on lightweight or flimsy, vibration/oscillation prone tripods.