| Joined: | Mon Apr 2nd, 2012 |
| Location: | South Lakeland, UK |
| Posts: | 4066 |
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The difference will be not so much in the sharpness, but the rendering of the out of focus parts, the bokeh. The 'faster' the lens the softer and more pronounced the bokeh, there is plenty of distance from the subject to the background, it should have worked well.
A wide aperture should have rendered the branches in the background much softer than they appear in that image. Difficult to tell but I think there might be slight camera movement, the nostril whiskers should have been pretty sharp at that distance, they seem to be softer and wider than I might have expected, suggesting movement. Higher shutter speed and wider aperture needed, to soften the background and prevent slight movement from blurring the image. I would have gone either wide open or one stop from wide open (depending on the lens) and at least 1/500sec exposure, adjusting the ISO to get the exposure right.
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Robert.