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Why am I having problems focusing with extension tubes?
I am adding Kenko tubes to my Nikon 50mm 1.8 D lens. I need some advice. This is my first time using extension tubes. I can't focus. I'm just getting a blurred image. Any advice would be welcome.
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2 Answers
When you add extension tubes, your camera become myopic, it will no longer focus to infinity (the ring shifts the focus range towards you). The thicker the ring or the shorter the lens, the more pronounced the effect. With the same 21mm ring on my 17-70 lens, at 70mm infinity focus is brought to 15cm while at 17mm it must be somewhere inside the lens.
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What everyone else said... Try looking at something relatively close (flowers on a table, etc.) and focus by moving closer or further away. You'll find that the focusing ring may have little effect, especially with longer extensions. Another odd effect is that when used with a zoom lens the zoom will change focus as well.
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Why am I having problems focusing with extension tubes?
I am adding Kenko tubes to my Nikon 50mm 1.8 D lens. I need some advice. This is my first time using extension tubes. I can't focus. I'm just getting a blurred image. Any advice would be welcome.
531 silver badge4 bronze badges
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When you add extension tubes, your camera become myopic, it will no longer focus to infinity (the ring shifts the focus range towards you). The thicker the ring or the shorter the lens, the more pronounced the effect. With the same 21mm ring on my 17-70 lens, at 70mm infinity focus is brought to 15cm while at 17mm it must be somewhere inside the lens.
21.7k1 gold badge29 silver badges64 bronze badges
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