One minute I take a shot and it's fine and not a minute or two later, I look through the viewfinder and it looks dark and grainy and will not/can not focus. Anyone think they know what's wrong? Would it be worth it to fix it or just sell it as a broken lens? Thanks.
Your discription indicates that the aperture is not opening after the exposure. Look in the lens after such an event to see if the aperture is partially closed.
My first thought was also that the aperture is stuck in a stopped down state at times. You can confirm this by placing the camera in Aperture priority mode, setting it to about f/22, then looking through the front of the lens and pressing the DOF preview button over and over. You'll likely see that it has a tendency to get hung up at times.
Sorry, I should've made myself more clear. I meant, the lens no longer has a clear view through the view finder. It is broken but I'm just not sure what's wrong. It didn't drop between working and no longer working. I just took one last shot with it and it was fine. And then I looked through the viewfinder again and it was dark and grainy. I cannot autofocus but if I take a shot in manual mode the photo will look fine.
mogbert wrote:
Sorry, I should've made myself more clear. I meant, the lens no longer has a clear view through the view finder. It is broken but I'm just not sure what's wrong. It didn't drop between working and no longer working. I just took one last shot with it and it was fine. And then I looked through the viewfinder again and it was dark and grainy. I cannot autofocus but if I take a shot in manual mode the photo will look fine.
You were very clear with your first post, and perfectly described an sticky aperture. An aperture that's stuck in the closed position will result in slow/bad/no autofocus because the AF sensor does not receive enough light to do its job.
Do the DOF preview trick I mentioned in my last post, and I think you'll see for yourself that you have an aperture that tends to get stuck at times.
Ahh, thanks! I should've posted this earlier. I'm currently overseas and left it back home because I couldn't figure it out. I will once I return home and hopefully it'll work!
