What is Reddit's opinion of qDslrDashboard?

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Some cameras have a built in intervalometer on the firmware but there are also remotes with his function. Another way is using 3rd party firmware updates that open up features but void warranties or open source camera control software like qdslrdashboard and digicam control which you run from another device.

There are a few mobile apps that connect to Canon DSLRs to display live video to the phone/tablet, both over wifi and via USB cable if you have the right adapter. Wifi is a little laggy, but shouldn't be a problem for astrophotography. And they also double as a remote for the camera, some even add some nice features.

I like qDSLRDashboard, but it's not free. I believe the Windows version is free if you want to try that before you buy. What's nice about this one is that it can connect to multiple camera simultaneously, so you can take multiple pics at the same moment at different angles.

DSLR Controller is another option that works on iOS and Android. I believe there's a free or paid version, but I can't remember for sure or the cost. I think the cost was more reasonable than qDSLR but lacks features. I found this one more stable than qDSLR, but I prefer the UI and features of qDSLR.

And Canon has their own too but it's very basic.

Also, if you get a camera that lacks wifi, you can convert a cheap mobile router to a wireless adapter for Canon cameras using 3rd party firmware. I did it and it's really nice. Basically, a $30 CamRanger. qDSLRDashboard has directions on their website as does DSLR Controller, but the firmware is app-specific. Need different firmware for each app if you go that route.

qDslrDashboard is a far better, but not free, app than Canon Connect. The PC version is free, I believe, so you can experiment with that before you buy the app and see if it meets your needs.

The problem is Canon and other companies keep changing their software, so those applications that claim to capture your camera over USB are mostly irrelevant and don't work. qDSLRDashboard (https://dslrdashboard.info/) is one of the few I trust that should work well to actually capture and control your camera, but it's not designed for live streaming or using as a webcam. It's more of a "tethered camera" application. I'm only mentioning this to highlight that yes, capturing strictly via software is possible, but for use as a webcam is not likely this way.

For hardware, you can just search for "PC capture card" or similar in your searches. I haven't had to buy one in a long time, haven't kept up with what's good/bad. But Elgato is one of the better companies out there for these devices. Most of their products are targeted towards video game systems to the PC to record gaming sessions, but there's literally nothing in how you connect these things that says it has to be used for gaming.

However, not long ago, Elgato did release a compact version of their capture box called the Elgato Cam Link. Here's a video showing how the Elgato Cam Link works to make a camera a webcam - https://youtu.be/GMEZHvAgV6c

Just make sure you connect to a USB 3 port with these devices. USB 2.0 is too slow.

I'm a huge fan of qDSLRDashboard for remote access to my DSLR. PC/Mac app is free. iOS and Android app are a little pricey (for an app). Not sure if this will interfere with your method of capturing but you can try it out. It adds PC control to your camera and does some automation and adds a few features like focus peaking. Just not sure if ti works with the 5DIV yet.

Canon's software also lets you remote control your camera from your PC in a similar way. It's pretty basic and simple. Might meet your needs too.

There's also the possibility that tethering your camera to your PC via software like this bypasses the timeout. Haven't tried it before though.

Do you have a laptop with a USB 3.0 port? If you have that and a long USB 3.0 cable with the Micro-B connector on one end (which looks like this) then you can connect the D810 to your laptop and use a tethering app on the laptop to both see the camera's live view and to control it. qDslrDashboard is a viable free app for Windows and Mac. If you need wireless, try CamRanger.

I connect my DSLR via USB to a remote battery powered router similar to this one: https://smile.amazon.com/gp/product/B0088PPFP4/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1. I then use an app on my iPad called qdslr (https://dslrdashboard.info/) to connect to the camera. I control everything on the camera from my iPad this way. The app is inexpensive and you should already have the cable.

See if there's any way you might be able to use qDSLRDashboard for this. It's not meant for streaming, but is capable of controlling multiple cameras simultaneously. https://dslrdashboard.info/

Otherwise, I'd imagine you need multiple applications, one for each camera, then use OBS to manage them. You might be able to just use OBS by itself but not really sure.

Have you tried anything yet?

The 2 Canon cameras I own are not compatible with the webcam utility, so I haven't had luck using it yet...

It won’t work. On the introduction page they explain that this uses PTP/IP to control the camera. This isn’t supported by the t5i, to my knowledge.

Why do you want an external monitor on your phone?

It’s going to be easier for you to find a cheaper external HDMI to use if you want a screen for videos.

Try qDSLRDashboard - https://dslrdashboard.info/

The mobile app is not free, but I think the PC applications are. This claims to support multiple cameras simultaneously, but I'm not sure if this would work for a webcam or OSB. It's more of a remote camera tool, similar to EOS Utility. I've only ever used the Android app, though, which also was supposed to support multiple cameras. I'm just not sure if the PC app works in the way you want it to. If it's free, it's worth trying/investigating. But I'm fully aware and want to be clear that I'm not sure this is at all what you're looking for.

I think it's working so far! I snapped a few test photos.

Initially, I missed this step:

https://dslrdashboard.info/windows-install-winusb-driver/

Stay away from those "10x macro lenses" or anything related- your 90/2.8 is an awesome piece of glass.

My best advice if you want to really dive deep into "pro-quality" macro:

Learn how to use the "focus stacking" feature of qDslrDashboard then blend the layers in PS.

For reference- when I shoot macro with my 150/2.8 (at f/11) the plane of focus is <1mm. That means I'll usually need to capture 50+ photos to get a few centimetres in focus in my final output. DslrDashboard is great but if you're serious about macro (you're getting paid) you buy one of these

Good luck!

If what I tell you doesn't help, check out https://dslrdashboard.info/...
There should be an icon on the right side of the app that looks (to me) like a calendar; thats the camera settings. With my setup I can change the ISO/shutter/f-stop. One thing I noticed is that I have to tap the desired setting very carefully or it won't take effect, sometimes having to tap it a few times to get it to change. But it does work whether I'm connected to my Galaxy S6 or my Lenovo tablet.