Laowa Aksen Ultra Macro APO Two-Lens Set 45mm f/2.8 1-5X + 17.5mm f/1.7 5-10X

The two Aksen ultra macro APO lenses bought together: the 45mm f/2.8 covering 1x to 5x and the 17.5mm f/1.7 covering 5x to 10x. Between them they run an unbroken 1x to 10x, which is the range where a single lens always leaves a gap and a bellows rig stops being practical.

Both are apochromatic, so colour fringing stays off the edges at magnifications where it is normally the limiting factor. The coaxial illumination version of the 17.5mm carries a light path down the optical axis, which is how you light a subject that the front element is almost touching. Choose the mount to match the body.