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This happens during malfunction of mirror and shutter.that is when cliked shutter opens but mirror did not go up so blank monitor screen hence no image in card. Take to skilled technician to replace shutter loader mechanism.
If you are initiating the shutter manually, it is quite possible that the camera has become very slightly loose at the F-mount. So, when you press the shutter button, the movement though it may be extremely slight, is shaking the camera at the exact moment you are taking the picture.
Make sure that the camera is tight to the F mount and that the F mount is secure to the microscope.
If you are initiating exposure via software, it is still possible that there is still some slight movement on your desk.
Remember, the slightest movement is magnified many, many times to the camera.
black screen blur image showingcannot see subject to be photographed when camera power on,if press to take photo nothing shows, just black screen. it was fine one minute then nothing the next. battery is fully charged, memory card ok.
Not really. Most cameras, including the P90, are designed not to show images not captured on that device (or at least the same model device). If it's a paper map, you could always try to photograph it. Photographing something off a computer screen is a little harder.
Unless you are using high-end Nikon Speedlights with camera and flash set for Auto FP High-Speed Sync, your top flash sync shutter speed on the D80 is 1/200 second. The black band you are seeing at faster shutter speeds is because the second curtain of the shutter begins to close before the first curtain reaches the fully-open position (which is when the flash fires). The higher the shutter speed, the shorter the gap between first and second curtains. To get full exposure with flash, there must be an instant when the shutter is fully open -- first curtain completed travel, second curtain not started yet.
"As the speed increases the final image should get lighter" applies to ISO speed. Higher shutter speeds mean less light reaching the sensor, but that's not the cause of the black bands.
Are you saying that part of the picture displayed on the camera screen flashes black? If so this is normal as far as I have read. It shows there is too much light on that part of that image. You can alter it not to show it flashing.
Do the pics show when you press the playback button? Does the menu display? If the display works, then check the menus to see whether image review got turned off. If the display doesn't work, it needs to be repaired/replaced.
To disable those blinking spots, just press the up or down cursor keys at the back of the camera while in playback mode. You will get three different views. One shows the EXIF data (Image data) as an over lay on your photograph. Press the button again to go to histogram mode, with graphs. Press it again to go to a mode where some image data is on the bottom of the display with no blinkies on the image.
Those blinking black spots are called highlights in a photograph. They indicate the areas where your photograph is over-exposed, i.e. where there is too much light and the colours are washed out. It can be a good tool to get a good exposure. Keep clicking with different settings till you get an exposure without those blinking spots.
Try playing back pictures you know were captured properly ( either with another properly working camera or with your camera before the problem with quality has appeared ). If the image is ok in playback but 'noisy' in capture mode then the CCD sensor is faulty /on its way out. Ask Canon if they repair CCD faults on this model free of charge.