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Questions tagged [ef-s]

The tag has no usage guidance.

-1
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3answers
132 views

Canon EF-S 10-18mm IS STM on a Canon 1300D

I am planning to buy the Canon EF-S 10-18mm IS STM for my Canon EOS 1300D as a better alternative to snap panorama / outdoor architecture photos. From what I've read this lens appears to be ...
1
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1answer
118 views

Why is my Canon 500D able to autofocus only after I manually focus it to the shortest focus distance?

While on holiday, my Canon 500D with EF-S 18-55mm lens stopped autofocusing at all. After fiddling, I’ve discovered that it only focuses when I manually turn the focus to as close up as possible, ...
1
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1answer
441 views

Strange spots on the image when filming video [duplicate]

When I'm filming video with my Canon EF-S 10-18mm f/4.5-5.6 IS STM lens, strange dark spots appear in the video and they are only visible in video mode and they are visible ONLY when focusing process ...
2
votes
4answers
472 views

How does the smaller mirror in APS-C cameras offer these advantages?

As Wikipedia says here The smaller mirror used in APS-C cameras also allows optical elements to protrude further into the camera body, which enhances the possibilities for wide angle and very wide ...
0
votes
1answer
421 views

Does a Ring-Ultrasonic EF-S lens require power to manually focus? (using with adapter)

Would the manual-focus-ring of a ring-ultrasonic EF-S lens (in particular the 17-55mm f/2.8 IS USM lens) focus even when the electronics are not working? Or would it require power to allow manual ...
2
votes
2answers
442 views

Canon APS-C: what is the maximum sensor size EF-S lenses are designed to support?

Given that Canon APS-C cameras differ in sensor size (e.g. 70D has a 22,5 x 15,0 mm and 700D has 22,3 x 14,9) is it possible for future models to switch from a 1,6 to 1,5 factor like Nikon crop ...
0
votes
1answer
856 views

Should I change a 18-55 IS STM kit lens for a EF-S 24/2.8 STM prime?

I have a Canon 700D body with a standard 18-55 IS STM lens. Would I notice any improvements in image quality if I switch from the kit lens to an EF-S 24 mm 2.8 prime? I also have a 50 mm 1.8 STM, and ...
1
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2answers
3k views

Can I use Canon EF-S lens designed for crop sensor with a full-frame Sony E mount camera?

Considering an Canon EF/EF-S mount adapter for a Sony E mount camera. Will a full frame A series sony camera like the A7s II be able to use a EF-S lens? I am guessing that yes, because the sony ...
1
vote
0answers
276 views

When using an EF-S lens, do I need to multiply by the crop factor? [duplicate]

I do know the physical difference between EF-S and EF lenses, but what I don't know is if I have to multiply by the crop factor (1,6) or if this is already taken into account in design?