Thank you all of you so much for the comments and advices. I am planning to do the second test of the printing either tonight or tomorrow. Sorry that I did not mentioned about the print size. I was printing on Ilford 5x7 size paper. One other thing that I would like to know is that will the height of the head of the enlarger will matter no matter what f-stop I use?. I guess I came to a certain height(around mid point) to focus correctly to fit 5x7 paper..(posted 8857 days ago)thanks Jin