 Jessica Wright |
Fuzzy pictures with closeup filters Hi, last week I bought a set of closup fulters for my Nikon D80 camera. The set came with a +1, +2, and a +4 closeup filter. I put the +1 filter on my lens, no problem. When I put the +2 and the +4, the picture is all fuzzy. Ive tried to use the manual focus, and to no avail. Does anyone have any useful tips. Thanks for your help.
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Alan N. Marcus |
Hi Jessica, Likely there is nothing wrong, you just need a little counsel. Likely you are underestimating the distance camera to subject. Set you zoom to the about the middle of its range. Mount the +2 and try to compose on a wall calendar or other patterned wall hanging. Start with the camera quire close allowing the camera to attempt an auto focus. Now slowly back the camera away from the target. Soon you will get a handle on needed subject-to-camera distance. Tip: When approximate focus is gained, best to fine tune altering, very slightly, the camera-to-subject distance. If this doesn’t work give a holler, I or others will come to your aid. Best of luck, Alan Marcus
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Jessica Wright |
Thank you, I will try this.
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Jessica Wright |
Hi, Im back again. I tried the trick with putting the lens in middle of the focal length. The picture is still fuzzy but not as bad as before. Im using the filters on a 70-300mm lens. Am I still too close to the object. Thanks for any tips. I appreciate all who help.
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Alan N. Marcus |
This can become very complicated if we must resort to math with the camera focus scale set to anything other than the infinity position ∞ whereas its easy if the camera is set to infinity ∞. You should be able to avoid all this and find the focus by experimenting with camera placement using a wall calendar or other wall chart. However: We will try this approach. Now if you mount any close-up or a combination of close-up lens you can convert the diopter unit to a millimeter unit. The formula is 1/d times 1000 where d is the power in diopters. If two or more lenses are stacked, just add the powers together. Now we convert the diopter unit to millimeters and then multiply the millimeters by 25.4 to convert to inches. Thus you compute close-up to subject distance I will ease you pain: Mount a +1 close-up. +1 is shorthand for 1000mm. Meaning with the camera lens set to ∞ the distance close-up to subject will be 1000mm. Mount a +2 close-up. +2 is shorthand for 500mm. Meaning with the camera lens set to ∞ the distance close-up to subject will be 500mm. Mount the +3 close-up. +3 is shorthand for 333mm. Meaning with the camera lens set to ∞ the distance close-up to subject will be 333mm. Mount the +4 close-up. +4 is shorthand for 225mm. Meaning with the camera lens set to ∞ the distance close-up to subject will be 225mm. Close-up lenses can be combined. Below is diopter power converted to millimeters and then to inches. +1 = 1000mm = 39.37 inches Nobody said its easy!
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Alan N. Marcus |
correction: then multiply the millimeters by 25.4 to convert to inches Should read divide the millimeters by 25.4 to convert to inches. I will dawn the dunce cap and sit in the corner for 10 minutes. Alan Marcus
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Jessica Wright |
Hey thanks. I appreciate your help
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