I've often wondered why they do it that way - esp when you cant even use the lenses on fullframe.Thanks, just wanted to make sure
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Lens recommendations please
- Thread starter swift412
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koffiejunkie
Executive Member
Because it's just the angle of view that changes, not the focal length. Same is with MF lenses. 50mm on a Pentax 67 is really wide. IIRC the negatives were exactly double the size, so 100mm would give the same field of view as 50mm on a 35mm film/FF-DSLR body. That doesn't mean it's 50mm lens, it's still 100mm, i.e. still bigger and heavier.
arf9999
MyBroadband Member
The lens is named for its focal length. This doesn't change according to sensor size.
The more I think about this the more confused I get 
So is the wide end of a EF-S 18-55 on a 350D wider (will you get a picture with a greater angle of what you're taking a photo of) than a EF 28mm on a 350D? But more or less the same as a 28mm on a full frame?
So is the wide end of a EF-S 18-55 on a 350D wider (will you get a picture with a greater angle of what you're taking a photo of) than a EF 28mm on a 350D? But more or less the same as a 28mm on a full frame?
Yes.The more I think about this the more confused I get
So is the wide end of a EF-S 18-55 on a 350D wider (will you get a picture with a greater angle of what you're taking a photo of) than a EF 28mm on a 350D? But more or less the same as a 28mm on a full frame?