Every other image blurry when using intervalometer?

[boogaloo]

Hi wonder if anyone can help. I shot my first night lapse last night with my Canon EOS M1 using 30s exposures in the 'shoot like crazy' mode. Reviewing the shots this morning every other shot is blurry.... Is this perhaps because I was using the wrong mode? My only other theory was that perhaps the camera was struggling to write files in time with the consecutive shooting (I'm using Large JPEG format and a Cat 10 Sandisk Extreme card). Any theories?

Many thanks

Boog

[Levas]

Blurry means movement during exposure, which could be the case during 30 seconds exposure.

If your memory card or camera isn't fast enough in writing the images away, your time between pictures becomes longer, but you won't get blurry pictures.

[dmilligan]

What do you mean by blurry? Out of focus? It would be a good idea to post examples. If focus is the problem, it's a good idea to use manual focus for a time lapse.