ichabod

Genofairch72

New member
I'm new at this and would like to know the adapter (s) needed for a 70-210 lens that would help take clear close-ups. I have a Sigma 50mm macro lens, but I'm not happy with the results. Can an adapter solve my poor macro photos if purchasing an adapter for the 70-210? I might add that I'm using a D7000 with this equipment.

Thanking you in advance,

Ichabod
 

WayneF

Senior Member
What's wrong with your macro shots? Probably it is just the understanding that extreme macro shots have virtually no depth of field, so that makes them difficult. For starters, when up extremely close, it needs about f/16 aperture to get any depth at all. Extreme close up is NOT your average snapshot, it needs some special attention. I am suggesting you stay with the macro lens. Talk to us more about your problems, show us some samples.. Maybe we can help with using it?

A close up filter on the other lens (with thread size to fit the filter threads) will allow it to focus closer. See Close Up Filter at B&H or Amazon.

The better closeup filters have two elements and cost more. You also have to stop the lens well down for best optical performance. They will not approach 1:1 macro closeup distance, but they will focus considerably closer than without the filter.

The macro lens will also focus at this same farther out distance, and surely will be superior to the filter.

See close-up filter tips - Google Search about using them.

See macro lens tips - Google Search about using the macro lens.
 
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J-see

Senior Member
If you know the minimal focus distance of your lens, you can calculate what diopter (close up) benefits.

1 Diopter is the ability to focus on 1 meter distance.
If you divide that meter, your diopter increases; 0.5m is 2D, 0.25 is 4D and so on.
In the opposite direction, each doubling of the meter halves your diopter; 2 meters is 0.5 diopter, 4 meters is 0.25D

To enable your tele to function as a macro, you have to know its minimal focus distance and then add the value of a close up diopter and check what effect it has.
If you can halve your focus distance, you can (about) double the magnification. It works up to a point and after that, the improvement becomes negligible.

Remember the distance is from the object to the sensor which implies too much enhancement brings the focus point "in" the lens.

If your macro is 1:1, I don 't see how it could be worse than using diopters.
 
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