EF vs EF-S interchangeability

[privateaddressf]

I know this has been discussed before, but I have a fairly specific case and I'm still not sure how the discussions apply.  My wife has agreed to photograph a relative's wedding.  She has done some semi-pro photography before but her Sony alpha DSLR has been acting up and she is buying an m50 as a backup.  She needs to buy lenses quickly.  

If she buys an EF 50mm and an ef-s 50mm and takes a picture from the m50 (aps-c) with each lens, in the same place, will the two pictures produced by the camera subtend the same visual angle or will one of them portray a larger apparent visual angle?

We don't have time to experiment with lots of things and do three or four rounds of shipping to get the fovs she needs covered. It would also be nice not to waste money on redundant lenses if EF and EF-S focal ranges behave differently when used on her camera.

[privateaddressf]

Ha!  Quick update.  I figured out where some of this confusion is coming from.  Viltrox sells an EF-M mount to EF lens adapter that includes a glass element that changes the apparent focal length of the lens.  If you use that adapter, the field of view on a cropped camera comes out approximately the same as when used on a full frame camera natively.

Lens Mount Adapter EF-EOS M2 Auto-Focus 0.71x Speed-Booster Control Ring for Canon EF Lens to Canon EOS-M (EF-M Mount) Mirrorless Cameras M M2 M3 M5 M6 M10 M50 M100 <search on Amazon if you want>

[deebatman316]

Buy the Canon EF to EF-M adapter. 3rd Party Mount adapters cause all kinds of problems. The product description says speed booster. Its best not to use Amazon or eBay for camera gear purchases. Unless it says sold and shipped by Amazon. Stick with Canon Authorized Dealers such as B&H Photo or Adorama. Also 3rd Party links WILL BE REMOVED by forum Moderators.

[privateaddressf]

My bad, didn't realize this was a no links forum.  Link removed.  My wife is certainly not purchasing that adapter.  She's getting the one that is a spacer with electrical passthroughs.  She can figure out which lens to use without adding extra cheap glass to the system.  I hear you about the 3rd party adapters, but at the same time, there's a reason 5,000+ people have given great reviews to a product that does the same thing for 1/4 of the price.  Going to the Canon adapter costs as much as another prime lens.  My wife's not a pro.  It's a hobby.

[krahe]

I've had no problems with my Viltrox adapter (not speed booster).