3

enter image description here

I run an online shop and I have been using Nikon 3100 for many years. Recently I started to notice that in all the pictures the right side slowly gets dark and there is a dark slit almost look like a vignette on the edge. I knew there were something not right but I could still use photoshop to solve that problem.

But all of sudden all the pictures are looking like that since yesterday. I use two strobe lights and manual mode to take studio pictures, strange thing is the shadow only appears in that circumstances. The pictures are absolutely normal when I use the other modes. My shutter speed is 1/250.

Can anyone tell me what’s wrong with my camera? Is it the shutter?

Improve this question
8
  • 6
    What is the shutter speed you used for the image? – scottbb♦ Apr 19 '19 at 15:14
  • I used wireless flash triggers. One on the camera and one on the strobes each – Susan Apr 19 '19 at 16:29
  • 7
    Why did you include a photograph of the image on your screen instead of just including the image itself? – David Richerby Apr 19 '19 at 23:05
  • 1
    Also note that some studio flashes have longer duration or slower "trigger lag" than a camera's flash sync speed, in which case a slower shutter time would be needed to get the full benefit of the slower flash. – Michael C Apr 19 '19 at 23:42
  • 1
    Seconding @DavidRicherby's question above. But if you really wanted to show it in context for some reason, take a screenshot (every OS has a means of doing that, in most cases it's the key with the actual name Print Screen [PrtSc]), rather than literally taking a photograph of your screen. – T.J. Crowder Apr 20 '19 at 8:44
18

The shutter speed now is 250

From what I can tell from the Google, the Nikon D3100 has a flash sync speed of 1/200. So, you're setting your shutter speed too fast and the curtain is already starting to close when the strobes pop.

Your maximum should be 1/200. But, honestly, there's no reason to even flirt with the edge that much. You can go down to 1/125 or even 1/60 and still get the same exposure - assuming your ambient light is turned down low. This way, you ensure the shutter is fully open when the strobes pop.

Improve this answer

Not the answer you're looking for? Browse other questions tagged or ask your own question.