05-02-2011, 11:34 AM
[quote name='Vieux loup' timestamp='1304332666' post='7996']
I admit my ignorance of this issue. Can someone explain to me what it really means in technical terms and what it means for taking pictures every day! Thanks in advance!
[/quote]
The more descriptive name for it I prefer is "focal length shrinkage" at close® focus distances. Depending on the design of the lens, the focal length of the lens may reduce from nominal as you focus closer. If you shoot a lot at closer distances, just be aware the actual focal length may be less than you think, with consequent effects.
I admit my ignorance of this issue. Can someone explain to me what it really means in technical terms and what it means for taking pictures every day! Thanks in advance!
[/quote]
The more descriptive name for it I prefer is "focal length shrinkage" at close® focus distances. Depending on the design of the lens, the focal length of the lens may reduce from nominal as you focus closer. If you shoot a lot at closer distances, just be aware the actual focal length may be less than you think, with consequent effects.
<a class="bbc_url" href="http://snowporing.deviantart.com/">dA</a> Canon 7D2, 7D, 5D2, 600D, 450D, 300D IR modified, 1D, EF-S 10-18, 15-85, EF 35/2, 85/1.8, 135/2, 70-300L, 100-400L, MP-E65, Zeiss 2/50, Sigma 150 macro, 120-300/2.8, Samyang 8mm fisheye, Olympus E-P1, Panasonic 20/1.7, Sony HX9V, Fuji X100.