This product was being promoted as a scanner capable of "superior color accuracy, high-definition scans with 4800x9600 dpi" and capable of scanning various photographic formats including 35mm color slides (like Kodachrome) and even negative color film strips.
At first, I tried to copy a magazine back cover to check that the unit was working and to become familiar with the controls. I set it for maximum resolution (there was lots of fine print on the item to be copied) and this would give an indication of its resolution.
Immediately, the scanner indicated the setting exceeded its capacity. Instead, it suggested copying at its default setting of 200ppi. I then tried setting it for a midrange resolution of around 3600. Again, it displayed the over-capacity warning. I tried lowering the setting to 1200 ppi and the copy began, however, the machine had altered the scanned area from a full page to only the lower left quarter of the page, which it proceeded to copy and send to the file folder.
Since 95% of my reason for purchasing the G4050 was to scan, and save on CDs, my collection of around 3,000 Kodachrome color slides, I proceeded to install the slide holder device and placed 16 slides in position for copying. Note that being able to copy 16 slides at a time is a great feature. I have used another brand of slide scanner, and the process of loading no more than 4 slides at a time made for a tedious and labor intensive operation, since each scan cycle required around 20 minutes.
I set the scanner at its maximum definitiion and once again encountered the warning about exceeding capacity. For the record, my CPU is a one year old HP Media unit with a 200GB hard drive with 172 GB free space. The scanner recommended its default definition of 200 ppi as an alternative. I worked my way down the definition scale from 9600 ppi trying to find a point at which copying would commence. I don't recall at what point that happened, but soon after scanning began, the G4050 indicated the size of the resulting file would be 44.9 GB ! I canceled the process. I lowered the definition setting down to 1200 ppi, overode the repeated advisory to use 200 ppi, and proceeded to have all 16 slides copied which took about 30 minutes. For each slide copied, the resulting image file size was around 9 megapixels. That pixel count is more than adequate for sharp prints up to 8.5 x11 inches, so I was optimistic. However, when I made test prints at 4x6 inches, they were not very sharp. Needless to say, the 8.5x11 size prints were far worse. I should mention that the color, brightness, and contrast were all very true to the original slides.
I have returned the scanner for a refund. I do not believe that images with 9 megapixels should produce anything less than a very sharp result. I have 40+ years of photography experience, beginning with home-processed and printed black and white. My Kodachrome slides were all taken with Leica cameras, known for their very sharp lenses. I can project my slides to images that are 10 feet wide and their sharpness is indisputable.
I do appreciate HP's efforts to provide a device that can assist in efficiently converting slides to digital images. I also apprreciate their willingness to accept a return of their merchandise.. Unfortunately, the G4050 does not meet my requirements. If a person was limiting print sizes to 4x6, then results provided by the G4050 might be acceptable.