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The Electro-Focus (EF) mount has been the standard lens mount for Canon cameras since it's introduction in 1987.

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2answers
153 views

Can I use a FD lens + extender with Canon EOS mount?

I have a Sigma 400 mm FD lens which comes with an FD to EOS (EF) adapter. Is it possible for me to attach an extender to it. May be a 2X FD extender and then attach the FD to EOS (EF) adapter. Is ...
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9answers
51k views

What is the difference between EF and EF-S lenses?

This is specific to Canon, but what is the difference between EF and EF-S lenses?
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3answers
3k views

Is there a way to use Canon 18-200 EF-s lens on Canon 6D full frame body?

I just purchased Canon 6D (Full frame camera) and I hate to lose the usage of my simple 18-200 EF-S lens. Any idea if there is a technology that allows me to use the lens on the 5d body?
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3answers
232 views

Canon EF 24/28 mm f/2.8 IS USM Autofocus Lenses

Is there a good reason to choose one lens over the other? Granted that the 24mm lens is a bit wider than the 28mm lens but are there any other reasons?
1
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1answer
307 views

Misfunction of Canon EF 50mm f/1.8 on manual focus?

I have a Canon T3i (600d) and two lenses: EF-S 18-135mm and EF 50mm f/1.8. While working with manual focus, I can shoot out of focus (on purpose) with the 18-135 (as expected). But with the EF 50mm, ...
3
votes
1answer
256 views

Are there any quality 1.7x teleconverters for Canon EF mount?

I am planning to buy a Canon EF 300mm f/2.8 L IS II soon, probably in the first half of next year. I plan for it to be my wildlife and birding lens, and with the 1.4x and 2x Mark III teleconverters ...
4
votes
3answers
3k views

Why isn't it safe to use EF-S lenses on fullframe?

I've heard that EF-S lenses are not compatible with full frame bodies and that using such lenses could damage the mirror. Are the EF-S lenses not compatible with full frame bodies in terms of "not ...
3
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2answers
6k views

What's the difference between Canon EF-S and EF-M?

What is the difference with Canon EF-S and EF-M lens?
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5answers
1k views

Tamron 17-50 f2.8 lens vs Canon 17-40mm 4.0 lens

How is the quality of the Tamron 17-50mm f2.8 lens? Specifically, is it comparable to the Canon 17-40mm lens, in the following measurements. Overall quality (Blur, aberrations, etc) Parallel lines ...
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3answers
296 views

What lenses could I get for EOS 60D beyond the kit? [closed]

I have just bought the EOS 60D and I am thinking to buy some new lenses. What are the next best lenses to buy to get more detail in my pictures and do they have to be EF-S lenses (like the kit lens ...
1
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2answers
608 views

Why I can't find an A-mount to Canon EF Adapter?

I looked online for an adapter from A-mount to Canon EF but I couldn't find. The Minolta/Sony A-mount flange focal distance is 44.50mm and Canon EF flang focal distance is 44.00mm, in theory A-mount ...