01-17-2020 05:05 PM
01-17-2020 05:09 PM
"I choise the EF 50MM 1.8 becasue A. I might want to zoom farther than the 55mm on the EF-S lense will give me, and a 50mmEF = 80mm on an APS-C."
This makes no sense at all. I am stil so confused with what all you are saying. You bought a great lens in the EF-S 17-55mm f/2.8 IS USM Lens. You don't need the ef 50mm f1.8 if you think it is longer (FL) it isn't. In fact it is shorter (FL)! It is 50mm vs 55mm or equivalent 80mm vs 88mm. Send it back. Keep the EF-S 17-55mm f/2.8 IS USM Lens that is the only lens you need.
01-17-2020 05:35 PM
01-17-2020 05:44 PM - edited 01-18-2020 12:56 PM
“ Yes, but the 18-55mm is an APS-C Lens (EF-S) while the 50mm is an EF (Full Frame) lense.”
That is a common confusion/misconception. EF-S describes a mechanical lens mount design. APS-C describes a sensor size.
An EF-S lens will only fit on an EF-S lens mount
A lens designated as APS-C usually has a projected image circle only large enough to cover an APS-C sensor, which is why they tend to be smaller and less expensive- everything else equal.
Focal length is a physical property of the lens - it is not affected by the lens mount.
The 50mm f/1.8 isn't going to give you what you thought (i.e.25mm more than your zoom), but it is a great lens. It is sharp, light, relatively inexpensive and makes a nice lightweight portrait setup on a Rebel body. Small, light, inobtrusive and a shallower depth of field than a 2.8 lens.
01-18-2020 12:53 PM
"The 50mm f/1.8 isn't going to
give you do what you thought, ... It is sharp, light, relatively inexpensive and makes a nice lightweight portrait setup on a Rebel body."
The "single" thing the 50mil prime has going for it, is price. Nothing else, matter of fact it is a limited use lens. It does make a good portrait lens as mention in the quote but so does the Canon EF-S 17-55mm f/2.8 IS USM Lens. All you did was duplicate the FL.
A lens is a lens is a lens and can never change unless physically altered. It matters not what camera you put it on, its FL can never change.
You need to educate yourself in photography otherwise you are going to waste money buying things that you don't need. It is clear you don't have a good understanding how this works. I would encourage you to ask questions and be as plain and open as possible. Most of us here are willing and able to help.