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Forum: Troubleshooting and Beginner Help 09-10-2015, 08:23 AM  
Help - my photos suddenly look mosaic
Posted By jatrax
Replies: 14
Views: 1,380
Anthony, your answer is in ISO = 6400. That is going to cause the graininess or mosaic look you are seeing. The higher the ISO the more grain. Everyone has a different tolerance for this and you need to figure out what yours is. I rarely if ever go over ISO 400 because my tolerance is very, very low. I know others often shoot at ISO 1600 and above. But 6400 is pushing things on that sensor.

There are ways to help but they involve shooting in RAW and developing the picture on the computer, applying noise reduction there. But even with a good develop workflow ISO 6400 is pushing the limit for your camera.

I would recommend to start using the camera in one of the modes that allows more control. For example use Av mode or P mode and select the aperture you want and the ISO you feel comfortable with. Using the SCN modes just allows the camera to decide what will produce the best exposed image. In this case it used ISO 6400 to do that, and it achieved a nicely exposed images at the expense of a lot of noise. As noted above, sometimes you DO have to read the manual :) Another good resource is a book called 'Understanding Exposure' by Brian Peterson.
Forum: Troubleshooting and Beginner Help 09-10-2015, 07:42 AM  
Help - my photos suddenly look mosaic
Posted By jatrax
Replies: 14
Views: 1,380
Anthony, in order to give a proper answer we need the full EXIF details for that photo. At the very least: what camera, lens, shutter speed, aperture and ISO you used. And what camera mode you used: Av, Sv or Auto or ?
You should also check the jpg quality settings and make sure they are on best. However, I suspect your ISO has gotten set very high, either set that way or because you are using Auto and the camera selected it.

Anyway, post the information or the EXIF and I think we can get you fixed up.
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