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Old Jan 4, 2012, 2:01 PM   #1
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Default Zoom Lens / Macro

Guys / Gals

I've recently got a K-r and also a Tamron 70-300mm Lens.
Now i've read how to switch between normal / macro but would someone please explain the difference and what the changes are when i switch between the two modes please ?

Thanks
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Old Jan 4, 2012, 6:58 PM   #2
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"Macro" is a term that generally refers to very close focusing. (Technically, macro actually refers to the size of the image projected onto the camera's sensor relative to the size of the actual object, but for the purposes of this discussion, macro means very close focusing.) You would set the lens in macro mode if you wanted to take a close-up photo of a flower, or an insect, or a coin, or anything. In normal mode, your lens is probably able to focus from about 1-2 meters to infinity. In macro mode, the lens can probably focus on an object that's just 1-2 centimeters from the front of the lens, but it probably cannot focus much more than a few meters.

For general photography, use normal mode. For close up photos, use macro mode.
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Old Jan 4, 2012, 7:35 PM   #3
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Macro lenses have to be capable of a focusing over a huge distance. That means that they can take longer to focus if the lens has to go from very close to infinity, which is why some lens manufacturers put a limiter switch. That means that when set to macro the lens might not focus to infinity, and when at normal, it won't go all the way to the shortest distance the lens can focus. That also means that it won't take as long for the lens to focus (some macro lenses are significantly slower to lock focus under some conditions).

I'm not familiar with your specific Tamron, but that's what I would assume is going on.
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Old Jan 5, 2012, 12:54 AM   #4
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Quote:
Originally Posted by mtnman View Post
"Macro" is a term that generally refers to very close focusing. (Technically, macro actually refers to the size of the image projected onto the camera's sensor relative to the size of the actual object, but for the purposes of this discussion, macro means very close focusing.) You would set the lens in macro mode if you wanted to take a close-up photo of a flower, or an insect, or a coin, or anything. In normal mode, your lens is probably able to focus from about 1-2 meters to infinity. In macro mode, the lens can probably focus on an object that's just 1-2 centimeters from the front of the lens, but it probably cannot focus much more than a few meters.

For general photography, use normal mode. For close up photos, use macro mode.
Quote:
Originally Posted by mtngal View Post
Macro lenses have to be capable of a focusing over a huge distance. That means that they can take longer to focus if the lens has to go from very close to infinity, which is why some lens manufacturers put a limiter switch. That means that when set to macro the lens might not focus to infinity, and when at normal, it won't go all the way to the shortest distance the lens can focus. That also means that it won't take as long for the lens to focus (some macro lenses are significantly slower to lock focus under some conditions).

I'm not familiar with your specific Tamron, but that's what I would assume is going on.

Right i see now why it has this switch
Many thanks
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Old Jan 5, 2012, 9:31 AM   #5
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I have the Tamron 70-300 and the switch does limit focusing. With the switch in Macro mode the lens is limited to the long end of the zoom range and is allowed to focus closer than normal and to infinity.

Hans
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Old Jan 5, 2012, 12:54 PM   #6
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Quote:
Originally Posted by hnikesch View Post
I have the Tamron 70-300 and the switch does limit focusing. With the switch in Macro mode the lens is limited to the long end of the zoom range and is allowed to focus closer than normal and to infinity.

Hans
Thanks Hans , i'll need to try it
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