Light Leak Or Poor Processing?

[joebt]

I just got a 90mm Leica Summicron-M yesterday, and took a few test shots with it today. My normal lab is down for repairs so I went to a new lab to get the negs developed. Each frame has this darker streak on the right side of the frame. Is this a light leak or just poor film developing? Dirty rollers?

 

[Finder]

Could it be a sticky shutter cutain? A light leak would make it brighter. I don't understand how processing would give a loss of density only on one side from top to the bottom of the film. It looks like the curtain is slowing over that section of the image decreasing the exposure.

 

[Ronald M]

Shutter bounce

 

[TJV]

Shutter bounce, maybe. Sticky first curtain, maybe. Lab, not likely...?

 

[joebt]

Thanks for the replies. I looked up shutter bounce and that seems to be what is happening. I'm going to send my DS M-3 in for CLA. Who does the best work? I'm located in Maryland.