I don't know why you want to zoom in on whatever it is that you are rendering, but perhaps try these render settings.

The bucket size is variable and can be adjusted by values of 8 if you need to lower or increase the value.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi