[Rick_In_CA]

I know this is an old thread… but.

I just picked up my 2024 Crosstrek Limited.
The eyesight cameras (all three) are encased in a black plastic shroud.
You can not see anything from inside, though you can see the lenses from outside.
I guess this protects the lenses from Windex and fingerprints.
There is also a large oddly shaped black area on the windshield. It‘s purpose may to shade the camera lenses from the sun? It is not as large as the gray windshield “no go zone” in the manual.

Anyway: Does anyone have a renewed opinion of the windshield no-go zone?

Now that the cameras are pretty much completely boxed in, you can’t really violate their views from inside.
Does the gray box rule the day for my dashcam install? Or will I be ok inside the gray, but outside the shroud?

 

[Rick_In_CA]

As mentioned, read your owner's manual about Eyesight and placing dash cams and EZ-Pass transponders anywhere near. Subaru warns against placing electronics near Eyesight so that's your first clue. If you choose to ignore warnings and Eyesight fails, there are only three reasons; aftermarket electronics interfering with Eyesight, inside/outside obscuration of cameras or outright Eyesight failure. You can experiment with temporary setups to see if interference occurs before a semi permanent installation but beware of environmental conditions triggering Eyesight failure with an error message and indicator; in addition to what's already mentioned, interior window fogging can occur to disrupt Eyesight.

My new Crosstrek Sport, since July, has triggered Eyesight errors. Each occurrence were brief. After reading issues about Eyesight in previous models, my Eyesight errors in my estimation, are attributed to inside fogging on warm humid days I didn't want ac and used blower speed for ventilation with windows closed. As soon as Eyesight triggered an error message with yellow symbol, I guessed humidity and either turned on ac or raised blower speed set for defrost to move airflow onto the windshield. No visible fogging was seen in every occurrence. Eyesight returned in a few blocks of local driving. The Eyesight covers do not completely seal against moisture intrusion into cameras as they're more for protection against interior damage from cleaning and maintenance. My concern, in NYC weather, is if Eyesight drops out more as temps drop and snow occurs as humidity goes up. Several rain days did not stop Eyesight, one or two days were pouring with wipers trying to keep the windshield clear for local driving. I usually have blower on for ventilation with windows closed to enjoy quiet driving and/or listening to music. In hot summer heat, ac was always on and I assume interior fogging is a non issue affecting Eyesight.

After a cold night, I imagine that the (glass?) lenses of the cameras are nice and cold And fog up. Even with the defroster on, they might take longer to defrost than the windshield.

 

[Rick_In_CA]

Dew point temperature is a function of temperature and relative humidity, not location. At a particular temperature and relative humidity, if the temperature goes up, the relative humidity decreases.
Ok, in Death Valley you might be less likely to get fog than at my brother’s lake front in the evening, but that’s still a function of dew point. The air is so dry in Death Valley, that the dew point is extremely low.

If the temperature goes down, the relative humidity goes up. When you reach 100% relative humidity, you’re at the dew point and fog starts to happen. If you park your car in winter full of moist warm air, when the glass gets cold it will fog up. Especially when you turn on the heat without the defroster/AC - which dry out the air before it blows on the cold windshield.

 

[Rick_In_CA]

It’s not “reasoning”. It’s literally the definition of Relative Humidity and Dew Point.

If these humidity readings are from your own inside hygrometer, it really has no relation to the RH% out doors.
If these humidity readings are from your own outside hygrometer, know that even fairly expensive meters are notoriously inaccurate, especially at the top end.