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12-21-2010, 10:47 PM   #1
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Macro for Pentax 55-300 Lens

The Pentax 55-300 Lens, while nice, does not support close focus/macro.

Has anyone successfully used macro filters or tubes to force a closer focus for this lens? If so, which option works better?

Or, is this a bad idea?


12-21-2010, 11:02 PM   #2
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The $50 Raynox DCR 150 clip-on closeup lens is excellent for macros with the 55-300mm Pentax zoom. Magnification ranges up to about 2x and working distance is about 8.3" (208mm). All the camera's automatic features work including flash. Raynox DCR 150 - Converter: Camera & Photo

The Raynox is lightweight, easy to carry, and quick to mount for use. See this thread for examples of what to expect with the Raynox:

There are no extension tube or bellows devices I know of that will work well with that lens because the lens lacks manual aperture control.

I have some good dedicated macro lenses but use a Raynox 150 on a DA 55-300 most often (You want the Raynox 150, not the 250 for use with the 55-300mm lens - the 250 is too strong & its working distance is too short for most purposes.)


Last edited by newarts; 12-22-2010 at 07:12 AM.
12-22-2010, 12:11 AM   #3
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These aren't the best macro shots I ever shot, but they are just for illustration.
One is with the DA55-300 with a Hoya +2 diopter lens and the other with the DFA100 macro. Guess which...

Take into account that I didn't manage to set the focus on exactly the same point.

Of course in real crusial macro work the DFA100 macro blows away the zoom, but it works as an OK solution until you get a dedicated macro.
12-22-2010, 02:37 AM   #4
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In addiction extension tubes are not really effective with long lenses, as the magnification obtained is given by the proportion of extension/focal lenght.

It means that in order to get to 1:2 with a 300mm lens youhave to extend 150mm, summing the extension the lens already has and extension tubes. It make a really long awkward thing to use, btw...

Last edited by Huck Finn; 12-23-2010 at 05:48 AM.
12-22-2010, 04:25 AM   #5
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10:1 macro's of a jumping spider using:

just for fun
12-23-2010, 04:59 AM   #6
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Great shots! I'll guess that your 10X setup is something like the 55-300 with a 28mm reverse-stacked on it. And a nice solid tripod.

The easy way to get macro (1X and greater) with your 55-300 is with a Raynox DCR-150 or -250. And the easy way to get micro (10X and greater) is by reverse-stacking a 24mm or 28mm manual prime onto your zoom. All that's needed is a cheap thread-reversal ring, and maybe a step-ring if the primary (mounted on the body) and the secondary (reversed lens) don't have identical front threads. Magnification is easy to calculate: M= P/S so a 24mm secondary stacked on a 300mm primary gives 300/24= 12.5X which is in the microphotography realm.

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