Barlowephoto
Leading Member
Make sure that your Nikon is using the same aperture and ISO as the Rollei, of course.Now, this is intriguing. I was one of those old pro's back in the 80's who shot Polaroids with my 4x5 and 8x 10 monorails. I'm very familiar with the ol' switcheroo ( "roids" to film ).In the old (film) days many professional photographers used to take Polaroid proofs.
Do the same with your digital camera. If you use a trigger with the TCM feature when you switch to manual mode (after you have your proof) it will convert the TTL settings and you can now connect the trigger to your film camera and shoot.
If something changes, switch to the TTL camera and take another proof. Never tried this setup but I believe it will work fine if you have lenses with similar apertures on both cameras.
So what you're saying then, is the Flashpoint Trigger Module, that sits in the Digital camera's hotshoe, will create the proper ratio. I can look at the LCD on the back of my Nikon and adjust, till it's perfect within 1/10th of a stop.
Or, as I said in my earlier answer, just use two separate transmitters. Have one XPro on the Nikon to set the lights with TTL, use a second one, with the SHOOT C.Fn set to APP cabled to the Rollei to trip the lights without changing the power settings. You probably wouldn't even need to use TCM to lock the settings down.Then take the Flashpoint Trigger Module off the Nikon, and transfer it to my 1950's Rollei , and plug it into the camera's PC sync Connector?
The SHOOT C.Fn on an XPro/X2T/R2 Pro II transmitter controls how the lights behave when shared between multiple transmitters. There are three settings: single shooter (one head icon), multiple shooters (three heads) and APP. Single shooter tells the transmitter to push out any settings changes any time there's been a change on the transmitter. This saves energy, but can cause confusion if there are multiple shooters sharing the same lights, and can leave one shooter with the wrong settings. So the multiple-shooter mode pushes out the settings with every frame taken, so settings are always overwritten with what's on the transmitter. The APP mode, however, tells the transmitter not to overwrite the last settings on the lights and to just send the sync signal, so you can, say, use one transmitter (or the smartphone app with a bluetooth capable transmitter like the A1, R2 Pro II, or X2T) to set the power, but have an on-camera transmitter fire the flashes without disturbing those settings.

Are we all talking about this device, to make sure I'm on the same page.
So if I buy 2 of these,....I'm set!?