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Solution to 39mm to 52mm Macro Coupler?

Started 9 months ago | Questions thread
3D Gunner Senior Member • Posts: 1,025
Re: Solution to 39mm to 52mm Macro Coupler?

BBbuilder467 wrote:

The reverse lens is the diopter. You can't stop it down or the main lens will see it.

A 23mm lens should be a +44 diopter when reversed. If the adapter and step-ring work, just use it.

The inverted lens is not just a diopter. The optical assembly of two lenses is more complicated than that of a lens plus a diopter.

The center of the combined lenses is actually shifted to the center of the reversed lens, so for aperture alterations, the apertures on the reversed lens must be used!

The inverted lens aperture must be closed as long as necessary to obtain an optimal ratio of sharpness and depth.

VILTROX 23mm F/1.4 inverted and at aperture 1.4 I don't think it can provide a usable image.

But I agree with the idea that if it works with the respective adapters, it should be used. It only takes $8 to take the test.

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