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<blockquote data-quote="Horoscope Fish" data-source="post: 627647" data-attributes="member: 13090">The focal length of the lens does appear to have an impact on depth of field, with longer focal lengths having a shallower DoF. For instance a 200mm lens, focused at twelve feet will, have a wafer-thin DoF as compared to a 20mm lens focused at the same distance. However, if the subject occupies the same portion of the frame, the depth of field is essentially the same whether you're shooting with a wide-angle lens or a telephoto. Obviously you would have to move closer with a wide-angle lens or further away with a telephoto lens to maintain the same subject size. The reason longer lenses appear to produce a shallower depth of field is thanks to their narrow angle of view: compared to a wide lens a telephoto will fill the frame with a much smaller area of background, so background blur appears magnified too. Clear as mud?I'm not really concerned about diffraction but neither have I noticed a significant improvement when stopping down to f/22. So, as a general rule, I shoot landscapes at f/11 or f/16......</blockquote>

[QUOTE="Horoscope Fish, post: 627647, member: 13090"] The focal length of the lens does appear to have an impact on depth of field, with longer focal lengths having a shallower DoF. For instance a 200mm lens, focused at twelve feet will, have a wafer-thin DoF as compared to a 20mm lens focused at the same distance. However, if the subject occupies the same portion of the frame, the depth of field is essentially the same whether you're shooting with a wide-angle lens or a telephoto. Obviously you would have to move closer with a wide-angle lens or further away with a telephoto lens to maintain the same subject size. The reason longer lenses appear to produce a shallower depth of field is thanks to their narrow angle of view: compared to a wide lens a telephoto will fill the frame with a much smaller area of background, so background blur appears magnified too. Clear as mud? I'm not really concerned about diffraction but neither have I noticed a significant improvement when stopping down to f/22. So, as a general rule, I shoot landscapes at f/11 or f/16. [COLOR="#FFFFFF"].....[/COLOR] [/QUOTE]

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