Hey there,
For Christmas I received a Kenko 1.4TC primarily for use on my Nikor 300f4 (nonAFS). I have been a little frustrated with it since I was unsure if my lack of sharpness was the TC's influence or my poor handholding technique. I was convinced it was technique and kept trying. I never really did any hardcore testing, it's not my nature, but came across this as a pretty good true test. After Shooting that Cowbird in the next post, I saw the light was good on a crocus. I took this shot, hand held f8 or 11 when you consider the TC. It was 1/1250 at ISO 400 and I leaned up against the house.



Then look at this 100% crop.



Now I know for sure the TC/300 combo has the potential and it is all my technique.

I did do a little post processing and there is some slight sharpening on this, but it definitely shows me that I need to improve my technique and get a good monopod.



Anybody want to share their techniques for shooting long glass?