Oneputt wrote:Kerry first of all great work - really superb.
I have both pieces of equipment that you have used and whilst I have not tried the Cannon on the 80-400 yet I have played around with it on the 70-200, and my results have been dissapointing when compared to yours.
Can I ask you to post the full image so that I can see the amount cropped? I am sure that will help me.
Thanks, I appreciate the kind compliment.
The wasp is only cropped for aspect ratio to 4:3. The bee photo isn't cropped at all. I can send you the originals, if you still would like to see them.
I'm not sure what you expect to see, with regard to comparison of the 70-200 photos to these. With the Canon 500d attached, at 400mm the magnification is slightly more than 1:1. At 200mm, it looks like it's slightly less than 1:2, so I guess that you're getting less than half the magnification. Makes sense, doesn't it? The magnification of 400mm is about twice that of 200mm.
With the Kenko 1.4x TC combined with the Canon on the 80-400, it gets close to 1.6:1 magnification.
An easy way to check your mag is to shoot a metric ruler. The d70 sensor is 24.3mm wide, IIRC. So, 1:1 mag would show no more than 24.3mm of the ruler, for the full width of the frame.