That's definitely a possibility--a consolation prize if a truly remote option wouldn't work. My one concern is whether touching the LCD would use enough force to add some amount of camera shake. Even when I set up a shot with the viewfinder today, I use a remote to make sure I'm keeping the camera as still as possible. This, of course, wouldn't be something to try out and see, but I do like the option.
I'll put that on my list of cameras to consider, and with that, look into its differences from the D7500 (I know I can find some comparisons online, so I'm not looking for anyone here to list them unless there's an obvious/major consideration I should know about).
To confirm, and I've been trying to figure this out but without being 100% sure, the EX lenses are full frame, correct? So that means that right now I'm benefiting from a 1.5x multiplier of the DX sensor, but the lenses themselves will work find with an FX. Except for the really small stuff, the 180mm is more often overkill than not good enough, so losing some of its effective zoom, especially of the resulting image is much larger than I'm currently getting, might not be much of an issue, if any at all.
There is a workaround to connect D850 to a computer via Wi-Fi. Essentially it involves using Snapbridge on a smartphone to trigger the D850 to start transmitting on Wi-Fi, then connnecting to the D850 W-Fi network from the computer instead from the smartphone. I frequently connect my D850 to QDSLRdashboard on my computer via Wi-Fi using this workaround, without use of any special adapters, and it is not hard to do. I presume the same can be done for Cascable, although I have not personally tried.
I also have a D90 (and a D800 and D850). One important advantage of the D750 or D850 is the tilting LCD screen. This alone may solve your ergonomics issue, by using it tilted in live view as you may be able to view it directly easily. Also the LCD screen, on the D850 at least, is crystal clear and bright (unlike the D90), and the live view mode is vastly improved over the D90 and enables perfect focus by touch.
“EX” is an older Sigma term for its higher-end lenses. “DC” indicates the equivalent of DX.
Yes, I do believe that touching the LCD will cause camera shake. Of course, one can use the LCD screen for viewing, and a cable release for the shutter, or, set the shutter to fire after a delay.
Each manufacturer has their own code to identify lenses. In Sigma I think the DC lenses for for crop sensor cameras and the DG lenses are for full frame sensors. Definitely the 180mm macro is for a full frame sensor. If you are looking at different lens models and you have a question then you have to carefully study their specs online.
In my particular case, tethering to my computer becomes a separate issue--I use a desktop and there's no way I could access it and my camera at the same time. As far as continuing to use the D90, that may work, but it does already have 160k+ shutter clicks, so I'm not sure how long it will last. The advantage right now is that it's been used primarily inside on a copy stand, so it doesn't see much abuse, but it is well past its lifespan.
This may bring a solution. If the screen and liveview are good/fast enough, I may be able to use them as a viewfinder and continue to use my existing remote shutter to take the picture. The issue now is that liveview on the D90 isn't clear enough to ensure I'm really well focused, so I'm stuck using the viewfinder, which is right in front of my copy stand's vertical beam, making it really hard to see. The Cascable idea was important to provide a way to see the image outside of the viewfinder and then hit the shutter. If I can do that with a remote and built-in LCD, it should probably be fine.
What a good idea. Just my two cents worth. I loved my D90 and the extra lens reach you get with DX is something to consider. I then went D700 and thenD750. This camera is good for the photojournalism work I do. Big difference is the lens cost. The camera body is about 20% of my outlay. Eg The 24 70 cost about the same as the D750. I like the 24mp sensor size. Gives great images without slowing my Mac down.i have printed to 6x4’ posters no problem so don’t worry on that front. Plus it’s light.
From what I've seen so far, the biggest difference between cameras (as it pertains to my needs) would be autofocus speed/accuracy and low-light performance. It may not come down specifically to FX vs. DX, but the camera that can perform the best, and if it happens to be FX, I'll switch. Coming from the D90, any recent model will be a major upgrade--I'll certainly be able to do anything I can already do, and get it at a higher resolution. But I also know what my current setup absolutely can't do, and that's anything high ISO, hand-held, while moving. As it happens, the one set of sample shots that really mirror what I want to do have come from someone with a D850, so I've at least seen that it can provide the performance I'm looking for.
