bodiebill

I am currently using a Canon 50mm lens on my Rebel 6Ti camera.
I would like a 35mm lens for a greater field of view.
One Canon lens available is for Full Frame sensor.
What are the pros and cons of using a Full Frame sensor lens with an APS-C sensor?

manofhg Loc: Knoxville, TN

I used to have an 18-55 kit lens that I used with my T2i. They are relatively cheap to purchase used. Be sure that if you buy a full frame lens that it will fit on the T6i. I know that when I went from crop to full frame (Canon), I had to buy new glass for the change in mounting. That said, if it will adapt, the quality of an "L" will yield much better results.

roxiemarty Loc: Florida

The Rebel 6Ti is a crop sensor, which means full sensor lenses will fit but be a closer field of view. I bought a 10-18 Canon lens fairly affordable, so I could have a wider lens. As long as the lenses are for Canon EOS cameras, they will fit.

CHG_CANON Loc: the Windy City

In addition to the 18-55 suggestion, look at the 24, 28, and 35mm options:

EF 24mm f/2.8 IS USM
EF-S 24mm f/2.8 STM
EF 28mm f/1.8 USM
EF 28mm f/2.8 IS
EF 35mm f/2 IS USM

You have a range of choices of price and IS / non IS. The EF-S lenses are limited to cropped DSLRs, but can be used on mirrorless EOS R bodies via an adapter. There's no real "con" to using a full-frame lens on your Rebel, except maybe, they'll typically be larger and heavier than an EF-S version, if there is an EF-S version of the same focal length.

robertjerl Loc: Corona, California

OK, back to classroom teacher mode: the same questions every year from new students. There are people on the UHH who cannot handle this - I spent 34+ years in the classroom and am used to it.

Canon EF-S lenses (for aps-c crop sensor cameras) will not mount on Canon Full Frame cameras due to an extra part on the mount to prevent it. Some of them have elements that project out the back and would hit the mirror on a FF body causing damage. So the special mount.

Canon EF lenses for FF cameras do not have projecting elements and thus will mount on both FF and APS-C bodies. Since they project a larger image to fill the FF sensor the APS-C sensor only sees the center of the image which is usually the sharpest part of the image (ie - ".the sweet spot") Also they will produce an image that a longer lens will see on a FF body - on an APS-C body a 100 mm EF lens will see an image the same as a 160 mm lens on the FF body.

I have both FF and APS-C bodies and I only buy EF mount lenses so they will work on both types of bodies.

My wife and daughter only have one APS-C body each and own a mix of EF and EF-S lenses I got for them.

Third party lenses (Sigma, Tamron etc) only use the EF mount, even if it is an APS-C lens, they make them without projecting elements. Thus they will mount on a Canon FF body but will not fill the sensor with an image. Here is a shot using a 10 mm Ultra Wide* made for APS-C on a Canon 6D FF body.

*Tamron 10-24 mm Ultra Wide Zoom, at 24 mm it is usable on a FF with a bit of cropping - this is the only EF-S lens I ever bought for myself to use on a 7DII. When my daughter fell in love with the lens to use at Anime and Cosplay events (mostly indoors) I gave it to her for her birthday. I can "borrow" it when I want since most of her camera gear did not go off to Medical School with her.

10 mm, extreme vignetting

(Download)

same lens at 24 mm, slight vignetting

(Download)

Robyn H Loc: MainLine PA

It's hard to take the question seriously when the poster can't get the camera model correct.

PGHphoto Loc: Pittsburgh, PA

Must be tough always being perfect. I fully understood the question, wonder why you couldn't get enough out of it to do anything but denigrate the OP ?

mwsilvers Loc: Central New Jersey

If you are set on a 35 mm lens, which will give you a 56 mm equivalent angle of view on your camera, I suggest you consider the Canon EF 35 mm f/2 IS USM. It will work just fine on your t6i camera body.

It can currently be had for $549 from authorized dealers. It has a fast f/2 aperture and has a light transmission (tStop) value of 2.0. That means it will let in as much or more light than most f/1.8 lenses which generally have tStops of 1.9 to 2.2. Even some f/1.4 primes only let in a little more light. A lens where the light transmission value equals its maximum aperture is relatively uncommon.

Its a short, compact lens that is not too heavy or bulky for your camera model, and its also one of the few short prime lenses that has image stabilization built one. It is a very sharp, highly rated, lens at a reasonable price. Some pros use it instead of the much bigger, heavier and much more expensive Canon 35mm f/1.4 L lens. For those of us who own and use one, this lens is a bargain.

robertjerl Loc: Corona, California

Transposition (6Ti vs T6i) is one of the most common typos in the real world.

I understood what was meant just fine - didn't you?

PHRubin Loc: Nashville TN USA

Any lens made for a FF Canon EF mount will work on an APS-C body. The T6i is an APS-C (crop frame) camera.

Furthermore, as robertjerl stated, the crop frame sensor only sees an image made by the "sweet spot" of a FF lens, the best part of the lens.

If you ever in the future decide to get a FF Canon camera (which I doubt I will ever do), any FF lens you have will work fine on it.

Some of my lenses are for crop frame, some for either FF or crop.

bodiebill

Thanks for your polite comment about my transposition of Canon Rebel T6i
Must be nice to be perfect!

mwsilvers Loc: Central New Jersey

We all saw the error but knew which camera the OP was referring to. I don't think we should be upsetting or embarrassing him because of a very minor model number mix-up. instead we should cutting him some slack and focusing on helping him with the question that caused him to post in the first place.

mwsilvers Loc: Central New Jersey

Just a suggestion. If you use the Quote/Reply feature we will know specifically for whom your response is intended. In this short (so far) thread, I think its pretty obvious who your post is aimed at, but its still a good habit to develop here.

robertjerl Loc: Corona, California

Now if you really want to see transpositions look at something I typed in a hurry before I proofread and edit. I think much faster than I type and one hand can type faster than the other so I have been known to reverse whole words or even the order of words in a sentence.

And don't go into spelling, I LOVE dictionaries - esp back when the oldest was in High School and would use my desktop to type and print papers - he had a bunch of friends from the UK and would change my spell checker over to "UK English".

Robyn H Loc: MainLine PA

Yes, it is tough but someone has to do it.