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05-30-2011, 07:49 AM   #16
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With close-up adapters such as the corrected Raynoxi and uncorrected cheap +diopter screw-ins, the close-up adapter lens diopter selects the working distance, while the focal length of the host lens determines magnification. Here is a table of diopters and working distances:

+1 >> 20-38" (500-950mm)
+2 >> 13-20" (330-500mm)
+3 >> 10-13" (250-330mm)
+4 >> 8--10" (205-250mm)
+5 >> 6.5-8" (165-205mm)
+6 >> 6-6.5" (153-165mm)
+8 >> 5" ---- (127mm)
+10 > 4" ---- (102mm)

So the DCR-150 (+4.8 dpt) has a working distance around 6.5-8.2" and the DCR-250 (+8 dpt) has a working disance around 5". Cheap screw-in adapters of different diopters have their own working distances, but are not corrected for optical aberrations. They can be fun to play with though!


Last edited by RioRico; 05-30-2011 at 08:26 AM.
06-25-2011, 05:49 PM   #17
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arrghhhh

Ok, so it took a while but I got the DA 1:4-5.8 55-300 and the reynox 150. The 55-300 is awesome for long distance shots. I just got to play around with it for a little bit. However I am having some trouble with the raynox. I cannot seem to get a clear picture now matter what I do. Any thoughts? I tried it on the DAL 18-55 and I can see images but nothing clearly.
06-25-2011, 06:20 PM   #18
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The Raynox DCR-150 is a corrected +4.8 dioptre closeup adapter. Huh? That means that its focus range is about 160-200mm / 6.5-8in. That's pretty close. Anything further (or closer) will not be in focus.

With a closeup adapter, the +dioptre strength controls the focus distance, and the focal length of the lens its mounted on controls the magnification. So no matter which of your lenses you mount the Raynox on, the focus distance remains about the same, while a longer focal length (like zooming out either lens you mention) gives more magnification. Those are the basics. Good luck!
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