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Lenses
Prime
Low keeper rate with 105 f2.5 AI-s
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<blockquote data-quote="aroy" data-source="post: 562407" data-attributes="member: 16090"><p>MF with not so great focusing screen and questionable eyesight is extremely difficult when the DOF is razor thin. The reason for using the 105mm Macro as an example is that most of the focusing problems are similar, in fact it would be worst for a 2.5 lens as compared to 2.8 lens.</p><p></p><p>That said, if you have to use MF with fast lenses that has a razor thin DOF, then the first step is to get a focusing screen that aids MF - ground glass with split screen would be ideal. Of course a darker screen would interfere with AF of slower lenses, but then you cannot have every thing.</p></blockquote><p></p>
[QUOTE="aroy, post: 562407, member: 16090"] MF with not so great focusing screen and questionable eyesight is extremely difficult when the DOF is razor thin. The reason for using the 105mm Macro as an example is that most of the focusing problems are similar, in fact it would be worst for a 2.5 lens as compared to 2.8 lens. That said, if you have to use MF with fast lenses that has a razor thin DOF, then the first step is to get a focusing screen that aids MF - ground glass with split screen would be ideal. Of course a darker screen would interfere with AF of slower lenses, but then you cannot have every thing. [/QUOTE]
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Lenses
Prime
Low keeper rate with 105 f2.5 AI-s
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