I've recently purchased a Nikon D5000 and an ML-L3 remote. It works great indoors, but I figured out that the camera refuses to fire from the remote when the warning message (subject is too dark) pops up. This is very annoying when trying to take long-exposure shots.
Are you using one of the Vari-Program (Pictogram) exposure modes? Sounds like the cameras AF system can't lock on the subject. In AF-S and possibly AF-A mode the shutter will not release unles the SF system has achieved focus lock. You could try using P,A,S,or M exposure modes and if you still have problems, set the camera in Manual Focus mode as well. Good Luck and Enjoy your Nikons!
None of my cameras will provide that message, so I just checked a pdf version of the D5000 manual and on page 222: "Subject Is too dark" indicates that there is a problem with the exposure. In other words the camera thinks the image will be under exposed and will not release the shutter. Try one or a combination of the following: 1. increasing the ISO 2. opening the Aperture (Smaller f/#) 3. decrease the shutter speed 4. use flash How dark is it and what are you trying to shoot? What exposure mode are you using? If the exposure you need is longer than 30 sec. you may have to use Manual exposure mode and the "bulb" setting. Good Luck and Enjoy your Nikons!
Nice shot! If you have the camera set in remote release mode (page 65) in delayed remote or quick response remote mode and you are aiming the remote at the Infrared receiver on the handgrip on the front of the camera, and the shutter still will not release. The only thing I can think of is there is a weak battery in the remote. However you say that it works when there is light! Good Luck and Enjoy your Nikons!
Sorry I could not be more help! My remotes both wired and RF wireless use the 10 pin motor terminal release port that the D5000 does not have. I am sure someone with more experience with that set up will chime in soon so keep checking. Good Luck and Enjoy your Nikons!
Yeah I've tried that. I had the camera facing out to sea at the pier, it said subject too dark, the remote didn't fire. I turned the tripod round to face the street, the message went away and the remote worked fine. It's very odd!
Woops, forgot to reply to this one, pretty much solved. I e-mailed Nikon and they said due to the auto-focus system it won't fire when it says "Subject is too dark" so you have to set the AF to manual and it seems to work. Strange because I could swear I tried that, oh well