Phil,
Glad you pointed that out. The f-mount 1.4X TC adds 6.7oz and the FTZ II adds 4.2oz. which puts the weight of the adapted, 1.4X teleconverted 500 f/5.6 at 61.9oz. -- only ~22oz lighter than the Z800PF f/6.3. When mounted on a Z-body, the 500PF then functions as a 700mm f/8 lens, giving up 100mm of reach and ⅔ stop of light, when compared to the Z800PF. I would also toss in the point that the Z800PF works very well with the Z1.4X TC, giving you 1120mm at f/9 -- only ⅓ stop dimmer than the teleconverted 500PF at 700mm f/8.
Glad you pointed that out. The f-mount 1.4X TC adds 6.7oz and the FTZ II adds 4.2oz. which puts the weight of the adapted, 1.4X teleconverted 500 f/5.6 at 61.9oz. -- only ~22oz lighter than the Z800PF f/6.3. When mounted on a Z-body, the 500PF then functions as a 700mm f/8 lens, giving up 100mm of reach and ⅔ stop of light, when compared to the Z800PF. I would also toss in the point that the Z800PF works very well with the Z1.4X TC, giving you 1120mm at f/9 -- only ⅓ stop dimmer than the teleconverted 500PF at 700mm f/8.