Rowey

Hi everyone I have recently purchased an XH1 which I love! I have also just purchased a 10-24 and have been experiencing grainy almost out of focus images with low speed landscape images. I always use a tripod and have my ISO locked on L. I have tried various apertures around f8 to f13. I have a CPL fitted and sometimes a grad filter depending on the conditions. Any ideas?

Hi my name is Brice and I am a keen amateur. Live in SW Western Australia.