I did test one vs a Canon 300 and it was about 30mm shorter as measured by frame coverage of a grid set at 30 feet - at infinity it is closer to 280mm and at MFD it is only about 260mm - so I call it a 270mm. Also if it were a true 300mm f/2.8, the front element would have to be at least 107mm across but its less than 100mm across.
that really suck. hope they fixed it. definitly nor normal.
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Focus appears to be on left chest under mouth.
Focus appearsto be on left shoulder/nek area.
Focus on rt. front shoulder, below head. Also lightened shadow near
rt. eye and increased the yellow in the eye. Also a little gausian
blur on the woods behind the yote.
PP= level, USM 300, .3,0. Color saturation 12/15%, downsize by 50%,
Focus Magic 1 pixel overall, and crop.
Bill
http://bjames.smugmug.com
really? there is so much more to it than just that. faster shutter speed, better background blur, possibility to use lower ISO are pretty important I think.
--Only as you grow older, your vision will remind you the difference
between a 50mm/F2.8 and a 50mm/F1.4 (faster).
Hope it helps.
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Cheers,
Jon.
