My usual disclaimer that these were not taken with a Pentax camera
I was trying to get some in flight Tern shots that didn't really pan out but while I was waiting an Egret landed right in front of me. The 1st few with the bare EF 400mm f/5.6L and the last few I added a Kenko 1.4x TC.
Canon EOS-1D Mark III ,Canon EF 400mm f/5.6L USM
1/5000s f/5.6 at 400.0mm iso400
Canon EOS-1D Mark III ,Canon EF 400mm f/5.6L USM
1/5000s f/5.6 at 400.0mm iso400
Canon EOS-1D Mark III ,Canon EF 400mm f/5.6L USM
1/4000s f/5.6 at 400.0mm iso400
Canon EOS-1D Mark III ,Canon EF 400mm f/5.6L USM + Kenko 1.4xTC
1/2500s f/9.0 at 560.0mm iso400
Canon EOS-1D Mark III ,Canon EF 400mm f/5.6L USM + Kenko 1.4xTC
1/2000s f/9.0 at 560.0mm iso400
Canon EOS-1D Mark III ,Canon EF 400mm f/5.6L USM + Kenko 1.4xTC
1/2500s f/9.0 at 560.0mm iso400
And the token Tern
Canon EOS-1D Mark III ,Canon EF 400mm f/5.6L USM + Kenko 1.4xTC
1/2000s f/8.0 at 560.0mm iso400
John