Firstly hi all,

I'm new to stock photography and have been browsing this forum for a few weeks so thanks for what I have learned so far.

I have been sending photos to microstock sites for the past week or so and am slowly building up a small portfolio on each. I'm fairly new to photography in general, not just microstock, but I'm learning as I go and enjoying it so far. 123rf, BS, DT and FP were reasonably easy to get work on, although looking now I'm not to keen on some of the images I have on them. PS and LO were a little harder but I learned a lot whilst trying, especially from LO they were quite good in there suggestions for improvement. I submitted to SS and SX way to early and have a while to wait before I can try again. My problem at the moment is IS, they have mainly turned down my applications because of noise and up-rezzing (although I haven't up-rezzed) their last response says it's my last chance and I should check to see if my "RAW converter, Graphics Image Editor or Camera is not interpolating/upsampling your photographs by default" as far as I can tell none of them are but I am new to digital software and cannot be sure. My main question is if I lower my image sizes in photoshop might this solve any sign of up-rezzing? I think IS are being pretty good about it especially since they are going so far as to suggest what might be my problem but being my last chance I need to get it right if possible. A large number of my rejections to all the sites have been for the same reasons so I obviously have a problem somewhere.

Sorry for writing a book, I got carried away and now I'm not sure I'm posting in the correct section  .

Thanks for reading  .

Sarkee