I initially contacted Hanson Instruments in search of a refurbished FDT unit for a research project. Although other companies I had previously approached promised the same level of service, I was very doubtful of the thoroughness of the checking having been given conflicting advice from different employees. On speaking with Lisa at Hanson Instruments, I was given a detailed account of the steps that would be taken to ensure the unit was fully operational for my study, including a calibration check at Zeiss and replacement of parts at the factory workshop.
New optical equipment is not always affordable, but second-hand refurbished units provide a viable alternative since they are usually delivered with a 6-month to 1-year warranty. Having delivered on their promise by providing excellent service from incredibly friendly staff, the shopping list soon grew and I ended up acquiring more items for my study including a motorised table top and Keeler Applanation Tonometer.
I found their prices to be highly competitive with options for quick, and reliable delivery, and would therefore highly recommend them for your future purchases.