Personally, I’ve been using this nodal slide for a while and has really helped to achieve perfect stitching in post-processing when used at the right length for your camera/lens setup. Great build quality and suits a wide range of camera setup from wide-angle to some telephoto combinations.
Sunwayfoto DMP-140R Multi-Purpose Rail Nodal Slide with screw-knob clamp, CNC cutting machine from light weight aircraft-grade aluminum, stain anodized surface finish for better abrasion and corrosion resistant. Compatible with all Arca-Swiss style plates.
It is widely used for fish-eye-lens and wide-angle lens.
The most important function of this product is accurately find nodal point for panoramic photography. For close-up photography, slide the camera in and out without moving the tripod.