Greg Woodhouse Photography 12:03am, 5 May 2008
I was reading the Magic Lantern guide for the 40D and found a statement to the effect that EF-S lenses can actually damage cameras like the 5D that are designed to be used with EF lenses. Is this true? I have no plans to try and use my one EF-S lens (the 17-85 mm kit lens for the 40D) with the 5D, but the idea that it could mechanically damage the 5D (something about "sitting low" in the lens mount) was new to me.

Does anyone know?
whipartist PRO 9 years ago
I believe the answer is yes.

The problem is that EF-S lenses extend farther back into the camera than EF lenses, and the mirror will hit the back of the lens. Look at the back of an EF and an EF-S lens side-by-side and you'll see the difference quite clearly.
I see what you mean.
jesse garrett 9 years ago
Since the EF-s produce a smaller image circle it has to sit lower in the mount to cover the frame. Because of the much larger mirror in the 5D it will slap the back of the ef-s lens. Now I have seen people Mod there EF-s lenses to retrofit them to their 5D but I have no clue why they did it. Now on sigma's Digital only lenses I know that most of them will fit on the 5D and not have a problem. this is because of the different style of lense design that sigma uses. You will get some very strong vignettes if you try it though. Which if your trying to do a faux Holga look( like I was) then this is useful.
drwhimsy 9 years ago
Yes, but if you have extension tubes, even the shortest will offset the mount distance and render an ef-s lens usable (with a shorter focal distance and a reduced depth of focus). I just tried this with an ef-s 60 mm macro lens and a 12 mm extension tube, which is likely the best lens to do this with because it accentuates the macro.
dmmaus PRO 9 years ago
The other side of the coin is that EF-S lenses are specifically designed not to fit on to a 5D. You won't actually be able to mount one on a 5D, so the chances of you damaging your camera by actually trying are pretty slim. The most likely damage route is if you try to force the lens on where it doesn't fit, and damage the lens mount, rather than getting it in there and then damaging the mirror.
Ken Zirkel PRO 9 years ago
Here's the guy who modified his 10-22 EF-S lens for use on a 5D.
[ Noktor-Matic ] 9 years ago
yeah!
thats why canon full frames suck a little! LOL

the D3 owns it you can use both FX (Full frame) and DX (Cropped) lenses on it

yeah!
i'm a nikonian too!
but don't get me wrong
i've a 5D haha
Sam Bennett...You are mad :)
@8-bit, suck a little? because their digital only/cropped sensor lenses aren't compatible? The D3 can use the nikon dx lenses but only utilize roughly 4mp on its sensor, so in turn you're not getting full frame on the D3 either. Canon still has the widest range of dedicated lenses available for full frame.
delta407 9 years ago
Note: the 10-22 above is on a 1D Mark III, not a 5D. The 1D Mark III has a smaller sensor (1.3x crop) and a smaller mirror than a 5D, and accordingly less problem with lenses extending into mirror-hitting range.
Michael B. 9 years ago
Yes, but if you have extension tubes, even the shortest will offset the mount distance and render an ef-s lens usable (with a shorter focal distance and a reduced depth of focus). I just tried this with an ef-s 60 mm macro lens and a 12 mm extension tube, which is likely the best lens to do this with because it accentuates the macro.

I just picked up some tubes for use with my other lenses, but never thought about using to for my 60 macro on the 5D!!

How did it work?
drwhimsy Posted 9 years ago. Edited by drwhimsy (member) 9 years ago
Here's an examples:

With two tubes: 12 mm + 20 mm

Andy gets his roughage, do you?

see large version here: farm3.static.flickr.com/2387/2470239980_d9c7b16003_b.jpg

You can also find the full size version in my photostream.
Maciej Freudenheim PRO 9 years ago
Mister - yea, it sucks. It's only 5mpix (5.33 to be exact) now in DX mode on D3, but soon (1-2 years?) there will be 30mpix+ FX models available which will allow you to shoot in 13mpix+ DX mode.

13mpix is pretty nice, isn't it? So, with Nikon you will be able to use any lens from their current line up, and have either 30mpix with FX lenses or 13mpix with small and lightweight DX ones.

With Canon you have to use the EF lenses - it's a bad design decision IMO. Canon didn't have to do this, as Nikon proves.
Account inactive go to: www.jamesdodd.net [deleted] 9 years ago
"Mister - yea, it sucks. It's only 5mpix (5.33 to be exact) now in DX mode on D3, but soon (1-2 years?) there will be 30mpix+ FX models available which will allow you to shoot in 13mpix+ DX mode."

haha! how is that even worth mentioning???

sell the EF-S lenses, buy EF ones, use them on some film bodies too... why compromise?
[ Noktor-Matic ] Posted 9 years ago. Edited by [ Noktor-Matic ] (member) 9 years ago
Actually to add to what i wrote
the D3 can still shoot in FX (full frame) mode
even when using a DX lens........

it just has a massive vignette at any focal length below 50mm

another note:
the Canon Crop sensor is smaller than the Nikon Crop sensor
I'm not worried about trying to use an EF-S lens on my 5D. It just occurred to me that it wouldn't be a good thing if I grabbed an EF-S lens from my camera bag and broke the camera. I didn't realize (or rather, hadn't considered) that they didn't fit, anyway.
Account inactive go to: www.jamesdodd.net [deleted] 9 years ago
@8-Bit Fujikon:
"the Canon Crop sensor is smaller than the Nikon Crop sensor"

I think your talking about the 1.6 of canon's XXD, XXXD series crop vs 1.5 of nikon and totally forgetting the 1.3 of the 1D series!

and

"the D3 can still shoot in FX (full frame) mode even when using a DX lens"

My camera can shoot without a lens, but the results are crap so I don't do that. I bought lenses that I knew would perform well to my equipment and I didn't want to hack away or compromise when I really didn't have to.

Even when I had a camera capable of using EF-S lenses, I never bought them.
If your lens is incapable of using the full frame sensor, it is not shooting full frame.

@Maciej - Im sure that in the future Nikon FF sensors will have more mp's but who's to say that Canon or any other manufacturer at that point in time wont have something similar in adapting crop lenses to FF compatibility. Its all speculation. What is more important to me, knowing that I should not invest in EF-S lenses now while having a Canon full frame, is the extensive dedicated EF line that is compatible with the FF cameras now and in the future. Nikon, while the D3 seems to be a killer camera, does not have as extensive access to lenses because Nikon has waited to introduce a FF camera, they are a bit behind in that respect. Sure they can use the crop or DX lenses, but that is a serious step down when taking into consideration that you have turned your FF 10mp+ top end camera into a 5mp cropped sensor camera.
Pixelda PRO 9 years ago
I've seen an article where someone removed the plastic insert at the back of the 10-22 lens, as it doesn't physycally to anything, then it fits a treat
Maciej Freudenheim PRO 9 years ago
Lekriz -
If I recall correctly, Nikon was the first one that produced a VR (IS equivalent) lens, but Canon was the first one that started producing them in large quantities.

JD!! -
I don't understand what's funny in this. It's always better to have more choice, and some DX/EF-S lenses are nice, and they will be more even nicer available in few years.
Gail Werner 9 years ago
So what are some of the EF-S lens? Just curious because this is a topic I didn't know much about....
Account inactive go to: www.jamesdodd.net [deleted] 9 years ago
@Maciej Freudenheim:
if you want to use them then do, but why spend that much on a camera body if your not going to use one of its key benefits?

you get a full frame camera to use the whole frame, so get lenses that do that, don't cut corners.

glass is more important than the camera... seriously, I wish people would think about it logically!
WD Brown Posted 9 years ago. Edited by WD Brown (member) 9 years ago
I tried mounting the 17-85 efs on my 5d not realizing it would not fit and it knocked off my focusing screen. A fellow photographer had it and i just wanted to try it .If its an efs lens dont even try it!
Maciej Freudenheim PRO 9 years ago
JD!! -

EF-S/DX lenses are not just about cutting the corners: they can also be smaller and lighter.

Just imagine a 30mpix FF camera and a neat, lightweight 100-300mm EF-S f/4 IS lens with a very good IQ. I would love to be able to use such a lens when I need to travel lightly, while still being able to get the most of my FF camera by using standard FF lenses, like L-primes, any time I want.

Instead of lugging around two cameras with me (a crop one and a FF one), what wouldn't make sense in situations when I want to travel reasonably lightly, I could just use the FF camera for everything.

Still, I don't see anything funny in it. It's all about choice. I don't understand how limiting the choice (due to a bad design decision) can be a good thing.
Michael B. Posted 9 years ago. Edited by Michael B. (member) 9 years ago
I don't understand how limiting the choice (due to a bad design decision) can be a good thing.

That's kind of how I feel about Canon not considering in-body IS, but I won't open up that can of worms. :)

Drwhimsy -
Thanks for posting the 60 macro example.
Spy to die 4 9 years ago
Same thing happened here as willbjazz!
I wish I knew before. I tried it today again ...imagine!
Then I came back home to check why it doesn't fit!
All the 2 weeks wait for my camera to get fixed...
Don't try it

I guess I have to sell them and get EF, is it much of a difference though?
Does anyone know?

Thanks
MisterSqueeze - (tyson robichaud) PRO Posted 9 years ago. Edited by MisterSqueeze - (tyson robichaud) (member) 9 years ago
@Spy to die 4, is what much of a difference? EF and EF-S lens prices? If that is what you're after, I guess it depends on what type of lens you want. There are very affordable EF mount lenses that will fit on any Canon EOS camera. Ranging from the $75(usd) EF50mm f/1.8 up to $12,000+ Super Tele lenses. You do not need to purchase EF "L" series lenses which run a bit more but if you do have the money to invest, it is a good option.

Which EF-S lens do you need to sell, and do you want to replace it with a similar focal length? The nice thing about the EF lens arsenal, is it is very expansive especially compared to most other manufacturers. Canon has more dedicated lenses for Full Frame (5D and 1Ds series cameras) than any other manufacturer that I am aware of. Take into consideration 3rd party lenses and it gets even more expansive so depending on your needs, you should be able to accommodate them with a variety of different choices.
Bob Lee PRO 5 years ago
I broke mine this way. Don't try it!
Actually, Canon EFS lenses WILL mount to the 5D. MOUNT. As in, do not press shutter, or your mirror will slap the back of your lens, thus screwing up both.

If you would like to do the mod on your EFS lens to be able to work with your full frame, you can go here: metku.net/index.html?path=mods/efs/index_eng4.

The mod takes 12 hours, and i am about to do it this weekend.

ALSO, 3rd Party Manufacturers do have EFS mount lenses that are a shorter back than the Canon OEM lenses, so look around (Sigma, Tamron, etc).
Andreas Helke 5 years ago
I am occasionally using EF-S lenses on my 5D.

If I forget that the widest focal lengts on them are not compatible with use on a EF camera the mirror hits the back of the lens and you get a error message instead of an image.

So far neither the camera nor the lens has been damaged by the hits.
drewx10 PRO 5 years ago
I'm really glad you all posted this here. I was thinking I was loosing my mind when my EFS 60mm wouldn't focus on my 5D. It fit fine on my 7D, but I've sold that. Guess I'll be getting an extension tube for the 60mm. Thanks y'all!!
Madame Miao 4 years ago
How about attaching the ef-s lens to a tilt macro adapter and then attach the adapter to the full frame ? Then straighten the lens and use it normally ?
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