... is a dead one! (IMO ;-)
One thing I have noticed with my new lens is that what I see through my viewer often does not match my final image, at least when it comes to images like this with a lot of background blur. Don't get me wrong, I love the blur that I can get with this one, especially compared to the kit lens I was using before. However, sometimes I'm surprised at just how much blur I end up with when I view the captured image, as that wasn't what I saw when I was setting up the photo through my viewer. It can also make it more challenging to get the part I want focused nice and sharp.
One thing I have noticed with my new lens is that what I see through my viewer often does not match my final image, at least when it comes to images like this with a lot of background blur. Don't get me wrong, I love the blur that I can get with this one, especially compared to the kit lens I was using before. However, sometimes I'm surprised at just how much blur I end up with when I view the captured image, as that wasn't what I saw when I was setting up the photo through my viewer. It can also make it more challenging to get the part I want focused nice and sharp.