thank you so much for your feedback. I never noticed those artifacts previously. So, if i understand, the close I approach the minimum focus point distance at wider aperture, the more I see that. I'm curious, is something that depends on the FUJI X system or is it normal to all camera system? (Nikon, Canon, Sony, etc.). In other terms, is it depending on something specific on the manufacturer / lens building system?
Thanks again for any feedback