have I Sinned (300 AFS f4 + 2 TC's)?

Discussion in 'Lens Lust' started by Jeff Lee, May 5, 2007.

  1. Jeff Lee

    Jeff Lee

    May 16, 2006
    Oregon
    [​IMG]

    Shot at about 40', using SB800, tripod, 300 AFS f4 + TCE1.4 + KenkoPro1.4, and Kirk Foot...

    Took some other test shots without flash. I was pretty amazed...either these TC's are very good or the 300 is just too sharp.
     
  2. That's pretty cool Jeff. I have both of those tc's and never thought to stack them. Does the camera know what's going on or do you have to give it a little help?
     
  3. So what is the actual focal length for that configuration?
     
  4. Actually, the dog's face and muzzle look out of proportion to me.
     
  5. Jeff Lee

    Jeff Lee

    May 16, 2006
    Oregon
    Acutally, Riley (and most Collies) have the longest nose you ever seen. That's pretty much what he looks like.
     
  6. Jeff Lee

    Jeff Lee

    May 16, 2006
    Oregon
    Lets see, 300 * 1.4 = 420, 1.4 * 420 = 588mm without the 1.5 factor.

    823 with it.
     
  7. Jeff Lee

    Jeff Lee

    May 16, 2006
    Oregon
    CP:

    Here is a "normal" image:

    [​IMG]

    I don't think the perspective is any different.
     
  8. Jeff Lee

    Jeff Lee

    May 16, 2006
    Oregon
    The only thing you lose is AF, and it doesn't report the right focal length.
     
  9. Thanks for posting a "normal" photo of your lovely doggie,too! :smile:
     
  10. Jeff Lee

    Jeff Lee

    May 16, 2006
    Oregon
    Thank you,. He's a gentle doggie, just has a big nose:)

    I will tell him you thinks he lovely.:smile: :biggrin:
     
    Last edited by a moderator: May 6, 2007
  11. rvink

    rvink

    Mar 21, 2006
    New Zealand
    Actually, it's a 2x factor - you can't get something from nothing.
    One 1.4x TC looses 1 stop. Adding another 1.4x TC looses another. With the 300/4 you end up with 600mm f8.
     
  12. whodathunk???
    Very nice Jeff
     
  13. Jeff Lee

    Jeff Lee

    May 16, 2006
    Oregon
    I ment the 1.5 sensor factor. I am wondering if you lose more than 2 stops, due to the number of elements. Anyone know?
     
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