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Lars Johnsson wrote:
Your argument is wrong When saying the 600mm has more focal length flexibility, because you can shoot at 600mm. No people buy a 800mm lens if they like to shoot at 600mm.
A bare lens will always beat another with TC.
Your # 3 & 4 are wrong
With your kind of argument the 400/2,8 will be even better
If you saying that desired subjects are never at a range that is good with the 600mm, but too close for the 800mm, then it is you who is wrong.
There are many lens+TC combinations that are as good as or better than bare lens. The 600mm + 1.4xTC vs 800mm is an example of this. Another example is the 300mm F2.8+1.4xTC compared to a 400mm F5.6 oe a 100-400mm F5.6.
When I look at the raw images on my monitor, I can't tell the 600mm images from the 600mm+1.4x images unless I look at the exif data. I hope you aren't trying to tell me that the 800mm is sharper than the new 600mm.
As far as your comment about the 400 F2.8, that is a completely different topic. This topic is about shooting in the 600mm to 1200mm range.
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