Yes, you can find the recording in the settings and choose to turn off 

Yes, you can find the number of photos in the settings, just set it to 3 

Yes and no. Using motion detection it doesn't work through a window. However.... using the timer inside it you can record through a window using it. How? Set the timer to record 4 minutes every 5 minutes for 1-5 hours or whatever time you need it to record for. This is what I do- just make sure you have a SD card with enough memory for the videos- I use a 32 GB SD card, I use it though a window as a security camera for my car....I live in an apartment so I can't hard wire anything and this works great for what it is. 

This issue could be improved according to following suggestions:

1. Q1: Camera shutter does not release when lens is attached
   A：The lens is fully manual and does not have electrical contacts. Please switch your camera to "M" (manual) mode
2. Q2: Images are too dark
   A：Lower the f-stop on the lens, and/or lower shutter speed, and/or raise ISO settings on camera
3. Q3: Images are too bright
   A：Raise the f-stop on the lens, and/or raise shutter speed, and/or raise ISO settings on camera
4. Q4: Images are not coming out in focus
   A：a) Adjust the focusing distance on the lens to the correct distance.
   b) In certain photographic situations, you may find it easier to focus at f/5.6-8 rather than f/3.5

 

You'll probably need an OM to M4/3 adapter... https://www.amazon.com/Concept-Mount-Adapter-Olympus-Camera/dp/B01172WA9I/ref=pd_day0_421_14?ie=UTF8&pd_rd_i=B01172WA9I&pd_rd_r=XK8BEYEK4CAAKRNCKJBA&pd_rd_w=L3R2o&pd_rd_wg=OUwIv&psc=1&refRID=XK8BEYEK4CAAKRNCKJBA