I see everyone elses landscape photos and they are all so crisp and clear...mine tends to be grainy and not sharp. Can someone help me understand why or what I could do to improve? It's always hit or miss. I've been using a blur to smooth it out and using a technique to sharpen as well. I know it sometimes has to do with a high iso but i'm not sure that's the issue. any other causes?
I was going to say the same thing. Check your ISO. the higher the number the grainier the photo. If there is not enough light coming in and if you are on Automatic the camera will choose a high ISO, the payoff being graininess.
I've been getting a lot of grain too... I blame the snapseed edits I've been doing (I've been trying to stick with low ISO). Their filters are awesome, but they do seem to add a lot of grain.
Another big reason for noise is exposure. On my d90 if i expose properly i can get really nice and usuable iso 3200. If i underexposure then iso 3200 looks like trash. I think your noise is because of a combination of processing and exposure and not iso. Im assuming you had to "burn" in the sky to make the clouds more dramatic and that will add a lot of noise because there just isnt enough information in the image because of exposure.
@celly525 Like others have said its all in a combination of ISO shutter speed and and Aperture, what camera mode are you using Auto, Manual AP or SP? If you want capture an image of a darkening sky and you are without a tripod just set your camera down on something solid and use your self timer to stop movement and get the right exp and shutter speed for say 100 or 200 ISO and you will have sharp crisp images.
i have to add tho that grainy isn't always bad tho, sometimes i feel it lends a texture to the shot too :)
You say you sharpened the image ~this will add grain too!