Published in Guide to Digital Infrared is a comparison with large crops showing the difference between 715nm and 830nm infrared cut filters, including the spectral transmission graphs for each.
The Coastal Optics 60mm f/4 UV-VIS-IR APO Macro was used so as to avoid any spectral limitations from the lens.
Also included are RawDigger histograms showing the actual raw data obtained for the 715nm and 830nm images.
The Nikon D800-IR used here was by MaxMax.com and is for sale from them. See the details on the first look page.