A question about Camranger (sorry, not related to the D500 specifically). I'm trying to get a larger screen for easier manual focusing for video applications for use with my DSLRs. I don't at present need the full capability of an external recorder. I am thinking that since with the Camranger, one can use an iOS device for LV, but this works through a wireless connection, is the live view shown on the iOS device screen (via Camranger) really synchronous with the live view on the camera, or would there be a noticeable additional delay?
If the screen is reasonably real time and has adequate resolution for focusing, this would mean that I can avoid for the time the additional cost and weight of an external recorder. One reason I don't want an external recorder is that I would like to have a reasonably light weight screen (my iPhone 6 is 129g, whereas external recorders weight from 300g to 1000g, roughly speaking). Another reason is that external recorders that support 4K through HDMI tend to be larger (7" screen, weight approaching one kg) than HD recorders (5" screen, ca. 400-600g) and of course, more expensive as well. A HD only recorder cannot to my knowledge take 4K output and downsample it, and the D5 (or D500) outputs 4K through HDMI when recording 4K. In a way I would like to maintain a smaller and lighter screen (but still bigger than the camera LCD) for focusing, but record 4K internally, and then resize the video in editing to FullHD so as to preserve a larger tonality (the bitrate is higher in 4K than FullHD, thus there should be more tonal information in FullHD generated by resizing 4K original data). Does this make sense? I have limited knowledge of video but I would like to experiment with it.
Perhaps the FullHD output is sufficient for all my purposes, and should be faster to post-process. In that case, just having a FullHD recorder with 5" would do it. However, I would like to try Camranger as it would allow me to use whatever screen I have in terms of mobile devices, if there is no significant additional lag. Camranger also advertise that the screen can be color calibrated, or this is how I understood it. I read about a green cast in Blackmagic's video assist recorders in user reviews. If there is a delay with wireless transmission of live view, then would a corded setup (connecting the iOS device directly to the camera via a cord and using an appropriate application) work better?
Thanks for any help.