I am trying to set a custom white balance on my D40 . I follow instructions carefully, but no matter what I do the camera says "Unable to measure custom white balance, try again" and inside the viewfinder it says "no Gd".
What exposure mode are you using? If the exposure is not correct, the WB can not be measured. Try puting the camera in Program mode. Are you using a gray card or a White Balance tool like an ExpoDisc? If you are using a gray card, is the gray card completely filling the frame? If you are using an ExpoDisc or other WB tool are you aiming the lens towards the light source? Good Luck and Enjoy your Nikons!
You might try setting the ISO to the setting you plan on using after you set the WB. The few times I have gotten a no good message it was because the exposure was wrong though I use an Expodisc to set the WB 98% of the time. Good Luck and Enjoy your Nikons!
It worked this morning inside the house, but there was decent light coming through windows. I tries again this evening inside the house with 0 daylight , only 2 100w bulbs but pretty bright regardless. It did NOT work. it said "no gd". I placed the white sheet of paper very close to the bulbs for good light but it still said "no gd". this is frustrating. Any other ideas?
If it works with daylight it should work with one or two light bulbs.
I just tried setting the WB with my ExpoDisc and with a sheet of white paper. The lighting was a single Compact Flourescent bulb distance about 4.5 - 5 ft. from paper and ExpoDisc. Camera and Lens: D300 w/ 85mm f/1.4D Exposure mode: Program ISO 200 Metering mode: Matrix Exposure: w/ ExpoDisc 1/15th sec. @ f/2.0 w/ sheet of paper; 1/25th sec. @ f/3.2. Results: Good I tried it four times total. Two times with the ExpoDisc and two times with the white sheet of paper and it worked perfectly each time.
Thinking about it I pulled out my D70S which has a similar sensor though is older than your D40. I tried it with my D70S w/ Tokina 28-70mm f/2.8 Exposure mode: Program ISO 200 Focal Length: 70mm Metering mode: Matrix Exposure: w/ sheet of paper; 1/25th sec. @ f/2.8. Result: Good
Since I don't have a slow lens, I tried again with the D70S w/ Tokina 28-70mm f/2.8 Exposure mode: Aperture priority at f/5.6 ISO 200 Focal Length: 70mm Metering mode: Matrix Exposure: w/ sheet of paper; 1/4th sec. @ f/5.6. Result: Good Given my results it should work. Good Luck and Enjoy your Nikons!
This is what I found out.The D40 under low ambient light will not let me set custom WB unless flash is activated. What happens is that when the flash icon inside the finder starts blinking, the only way to do a custom WB measrement is to raise the flash. But, that fires the flash and the WB is measured for flash, not ambient only. This is a serious shortcoming. Is there a way to do Custom WB measurement without raising the flash in low interior ambient light?
There is nothing in the D40 Users Manual discribing that limitation. Unfortunatly I don't have a D40 body to test. If what you say is true, it would imply that the d40 requires more light to measure the WB correctly. Using a fast prime, like the 35mm f/1.8 or the 50mm f/1.4 shot wide open might get enough light to the sensor for the camera to be able to detect the WB correctly. Maybe someone that has a D40 can verify your findings. Good Luck and Enjoy your Nikons!
Thats exactly what i was thinking. I'll try with the 35mm 1.8 DX tomorrow night. But here is a funny thing I noticed through all of this, and that is: in manual mode with the aperture wide open and shutter at 30 seconds AND the analog exposure grid in the finder showing drastic over exposure; THE FLASH ICON STILL BLINKS!!!!! What the heck does that mean?
Strange behavior indeed! My best guess is since the D40 is an entry level camera Nikon programmed the flash icon to blink to warn the user of the possibility of blur due to camera shake. Good Luck and Enjoy your Nikons!
Another thing to try, is to increase EV comp one or two stops. That is overexpose the image by that much. Its what I had to do with my IR converted D50. I didn't mention it before because I wasn't sure it would apply to your D40. Now I think it might apply.
"The wisest follow their own directions" -Euripides "I thought there would be more elephants" -C. Columbus
>I was able to capture a custom white balance without using >the flash on my D40. I don't remember my settings, but if >you're haven't resolved this issue, I'll try it again, and >report my settings. > >
Yes PLEASE, as I have not been able to do it. It works with my D700, but not the D40. Please do try again and advise. Much appreciated
Sorry that I missed this thread altogether and didn't contribute. Friend, I don't know how low ambient light is for you but I could get a "Gd" from my D40 at shutter of 1/5, ISO of 800 and aperture of F/4.5 with my 18-70mm and I could also do it with my Tamron 17-50mm.
What I did was, I pointed my finger at the white piece of paper so that the camera would focus and read off from my finger at the paper. Then I remove my finger for the final shot.
I wonder if it is the camera contacts with lens that is not able to get information from the camera? I could be totally wrong here, just throwing out some thoughts.
>Sorry that I missed this thread altogether and didn't >contribute. Friend, I don't know how low ambient light is for >you but I could get a "Gd" from my D40 at shutter of >1/5, ISO of 800 and aperture of F/4.5 with my 18-70mm and I >could also do it with my Tamron 17-50mm. > >What I did was, I pointed my finger at the white piece of >paper so that the camera would focus and read off from my >finger at the paper. Then I remove my finger for the final >shot. > >I wonder if it is the camera contacts with lens that is not >able to get information from the camera? I could be totally >wrong here, just throwing out some thoughts. > Thanks I will try that
With the D40 I usually just use auto white balance and RAW and fix any problems later. But reading all these posts piqued my interest so I just now tried it twice in my darkish living room at night with a sheet of white paper. I wasn't even that careful with exposure. It was asking for the flash, but I didn't use it.
Firstly with 35 1.8 ISO 400 1/25 sec F2.5 - worked fine
Secondly 55-200m at 55 1/13 sec at F4.5 ISO 400 - worked fine
You must have a problem with your camera, lens, or procedure. Sorry I can't diagnose which.