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stacker:docs:tables:macromicrodof [2019/12/12 22:50] rjlittlefield |
stacker:docs:tables:macromicrodof [2019/12/12 22:59] rjlittlefield |
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| Now that you know the magnification, you can use one of the following tables to estimate best aperture and step size. | Now that you know the magnification, you can use one of the following tables to estimate best aperture and step size. | ||
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| - | The first Table 2-A is for users who fit any of the following profiles: | + | The first ** Table 2-A ** is for users who fit any of the following profiles: |
| * All users of twist-to-focus macro lenses, except for modern Nikons. (There's a separate table below for them.) | * All users of twist-to-focus macro lenses, except for modern Nikons. (There's a separate table below for them.) | ||
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| ^ 20 | //0.0097 mm // | //0.019 mm // | //0.039 mm // | //0.076 mm // | //0.16 mm // | //0.29 mm // | //0.62 mm // | //1.2 mm // | | ^ 20 | //0.0097 mm // | //0.019 mm // | //0.039 mm // | //0.076 mm // | //0.16 mm // | //0.29 mm // | //0.62 mm // | //1.2 mm // | | ||
| - | The following Table 2-B is for users who fit any of the following profiles: | + | \\ |
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| + | The following ** Table 2-B ** is for users who fit any of the following profiles: | ||
| * All users of modern Nikon macro lenses whose minimum f-number changes depending on magnification. (When using these lenses, the value you set into the camera is actually the "effective aperture", already corrected for magnification.) | * All users of modern Nikon macro lenses whose minimum f-number changes depending on magnification. (When using these lenses, the value you set into the camera is actually the "effective aperture", already corrected for magnification.) | ||
| * All users of add-on closeup lenses ("diopter filters"). | * All users of add-on closeup lenses ("diopter filters"). | ||
| * All users of "reversed lens combos" (short reversed in front of long), when aperture is set on the rear lens. | * All users of "reversed lens combos" (short reversed in front of long), when aperture is set on the rear lens. | ||
| - | * All users of "reversed lens combos", when aperture is set on the front lens AND effective aperture is calculated as front lens f-number * magnification. (Example: 50 mm f/5.6 on the front, 100 mm on the rear, magnification = 100/50 = 2, effective aperture = 2*5.6 = f/11.) | + | * All users of "reversed lens combos", when aperture is set on the front lens AND effective aperture is calculated as front lens f-number * magnification. \\ Example: 50 mm f/5.6 on the front, 100 mm on the rear, magnification = 100/50 = 2.0, effective aperture = 2*5.6 = f/11, use the f/11.0 column of the table to find DOF = 0.067 mm. |
| As before, a range of values appears in bold face. If you're using a camera with an APS-C size sensor ("crop factor" 1.5 or 1.6), then you should pick a value near the middle of the bold range. Full-frame users should choose from the right side (larger f-numbers); Four-Thirds users choose from the left side (smaller f-numbers). Entries in italics should be avoided if possible because those combinations will lose significant sharpness from diffraction. | As before, a range of values appears in bold face. If you're using a camera with an APS-C size sensor ("crop factor" 1.5 or 1.6), then you should pick a value near the middle of the bold range. Full-frame users should choose from the right side (larger f-numbers); Four-Thirds users choose from the left side (smaller f-numbers). Entries in italics should be avoided if possible because those combinations will lose significant sharpness from diffraction. | ||