Best lens? Sigma 105mm f/2.8 DG DN Macro Art

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I briefly checked data published by sigma

And found that the lenses are about the same length and weight. From a physical point of view, they are close to be equal (±)

Minimum focusing distances are 11.6 and 10.2 inches respectively, about 1.5 inches or 4cm. which is not the world either. add 0.5 inches for physical length and the cameras will be 2 in or 5 cm apart. If that is the difference between sturdy and wobble, your setup needs to be made sturdier to start with. There are many items that are just a tad elastic, and the more parts one uses the more tads will add up.

The sturdiest vertical setup I’ve experimented so far is this one…but I’m tempted to make it horizontal and with much better sealing between the lens and the negative. Something like the Nikon ES-2 looks promising, but it has its limitations, specially regarding the lens’s focal length.

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