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I'm looking into used PB-4 or PB-6 bellows for my Nikon system that I use to do amateur botanical shots. Currently I use a couple of macro lenses and some extenders. The price of each bellows is about the same. Will either one give me anything the other won't? If so, what?

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    The PB-4 can do tilt/swing allowing you to change the plane of focus which can be very useful for manipulating the small DOF that comes with macro. Google scheimpflug principle. There's also an article here about using the PB-4 with a enlarging lens throughthefmount.com/articles_tips_bellows.html – moorej Jun 11 '15 at 14:38
  • Have you researched the two models to compare features? I don't know how likely it is anyone here has used both models. – MikeW Sep 10 '15 at 0:23
  • Yes, I picked up a used PB-6 (not the cheap one I was eyeing though); most pros have several of these lying around. I'm glad I picked up PB-6 because I can now use my Zeiss Planar lens that has a thick metal f-mount adapter. PB-4 wouldn't have had enough space, but PB-6 has enough. I wanted to put all this info I learned, but once this person marked this question for closing, I lost interest. – Emacs User Sep 10 '15 at 0:36
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PB-6 has more tolerances for more mounting rings, especially if one has to use old metal converters on medium and large format lenses. PB-4 can also mount those manual converters but for some tight angles may interfere with free movement of the bellows. PB-6 design is more accommodating.

That is the response I got when I asked a true expert, an expert who has been shooting macro photography for 37 years whom I met a local photography club meeting.

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