Here's a calculator for diffraction limit which contains a list of airy disk sizes for different apertures :http://www.cambridgeincolour.com/tutorials/diffraction-photography.htm
Exposure is good, subject is not very interesting (to me).
Eyes are drawn to highlights- your main subject is in shadow, exactly the opposite of what you want. Glossy surfaces benefit from large light sources. Try large white diffusers to the left & right of the subject.
This one's nice- abstract diagonal background with close-up foreground. Things to improve: add some light to the foreground (reflector/flash) so it stands out more and the sun's contrast on the grapes isn't as high. Also try backlighting the fruit if they are somewhat translucent.
This would work well if shot in a light tent
RioChan-HongKong wrote: > i want to ask something...the "sky and foreground" is HDR?And also other pictures for the startrail??And you merge them into this final picture?Am i right?
Based on the above post, he took 9 shots of the foreground before it got too dark and used those for an HDR composite. He then took 120 photos of the sky and merged all those together (no need for HDR in that case). Then the foreground and sky were blended together.
Very intense, perfect contrast.Care to describe your post processing ?