Fresh Dew on a Rose

by adarsha joisa

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Pentax had a helical extension tube. It is dumb, but it allows changing the tube's length by simply twisting the ring. One can vary the magnification, & if using a zoom, by altering focal length, can refocus. I bought one MANY moons ago & for me it's been quite useful.


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Fotodiox is selling am "aperture control enabler" now that's designed to do this for macro reversed lenses. You could use it pointing the standard direction on a manual camera body if you got the right filter thread adapters, though it will mess up the flange-focal distance, so it's probably only useful if you're using a macro lens anyway or your image ...



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