Macro Photography: From Snapshots to Great Shots by Rob Sheppard

Author:Rob Sheppard [Sheppard, Rob]
Language: eng
Format: epub, pdf
Publisher: Pearson Education
Published: 2015-03-19T22:00:00+00:00

But as your telephotos increase in strength, that is, their focal length gets longer, you need increasingly more extension to move the optics away from the sensor to allow them to focus closer. This either means an increased distance built into the focusing mechanism of the camera lens (either real or virtual due to additional optics) or larger sets of extension tubes.

Achromatic close-up lenses give you stronger close-up focusing effects than you get when used with a wide-angle lens. That is actually due to how the optics of an add-on lens work with the lens, and you can use this to your advantage. Sometimes it is much easier to use an achromatic close-up lens with a long telephoto focal length simply because you can get very close with such an attachment and you don’t have to deal with an unwieldy lens that got extra long because you had to use lots of extension tubes.

Regardless of how you do it, adding telephoto focal lengths to your close-up gear possibilities will definitely open up your options for close work, as shown in Figure 6.1.

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