18-55 EF-S Modified to an 18-55 EF

[daaaveman]

Check this out. Very interesting. I'm not sure why......but to each his own.......

http://www.robgalbraith.com/ubbthreads/showflat.php?Cat=&Number=230366&page=0&view=collap sed&sb=5&o=&fpart=1#Post230541

[nosquare2003]

Check this out. Very interesting. I'm not sure why......but to each his own.......

http://www.robgalbraith.com/ubbthreads/showflat.php?Cat=&Number=230366&page=0&view=collap sed&sb=5&o=&fpart=1#Post230541

See:

http://www.bobatkins.com/photography/tutorials/efs-10d.html

[ron chappel]

That's one of the neater mods i've seen,allthough the epoxy is not really enssesary at all.I tried to cut mine off with a blade knife but the plastic is too tough! :shock: I didn't want to use a hacksaw because it would be too crude(a jewlers saw seems to be the best)
I decided to just swap the mount for another EF lens mount just to experiment.The one off the 28-105/3.5-4.5 fits,it's the same thickness (but only two mount screws line up...um,sort of)

I only did it to mine to try it on a film camera.I'll upload an example...

[PacAce]

The one nagging question I have is why Canon even came up with an EF-S type mount if, after hacking off the protrusion at the rear of the lens, the lens works just fine in any other EOS camera. Or is there something I'm missing, like maybe the lens can't really be used on a regular EOS body in the wide angle range or something like that?

[ron chappel]

I'll upload one if photo.net get's it's act together.....






Ah ha!! finally :?

http://www.photo.net/photodb/photo?photo_id=2297353&size=lg

[CoolToolGuy]

The one nagging question I have is why Canon even came up with an EF-S type mount if, after hacking off the protrusion at the rear of the lens, the lens works just fine in any other EOS camera. Or is there something I'm missing, like maybe the lens can't really be used on a regular EOS body in the wide angle range or something like that?

It might be because the image circle for the EF-S lenses is designed for the 1.6 crop factor, and if they let it be mounted on any EOS it may wind up on a 1D or even a film camera where the image would not be acceptable.

EDIT: Duh - I clicked on Ron's link after I posted the above, and he shows it perfectly. :oops:

[PacAce]

But of course! I should have known that. How quickly we forget about the film and the full-frame world after only a short time with the 10D and the 1.6 crop factor. :D

Thanks for the reminder.

[Jesper]

The one nagging question I have is why Canon even came up with an EF-S type mount if, after hacking off the protrusion at the rear of the lens, the lens works just fine in any other EOS camera. Or is there something I'm missing, like maybe the lens can't really be used on a regular EOS body in the wide angle range or something like that?

I can remember discussions about the shorter back-focus distance of the EF-S lens, which means that the back of the lens sticks further into the body. For digital cameras, it has advantages to have the back of the lens closer to the sensor - don't ask me why, I don't know exactly...

But because of that, people thought that if you'd put the EF-S lens on a full frame EOS camera (film or digital), you might damage the mirror because it would slap against the back of the lens. That would happen especially at the shortest focal lengths (18-22 mm).

Obviously that doesn't seem to be true, the example photo posted by Ron above was taken at 18 mm.

[robertwgross]

This certainly brings a whole new meaning to the term "hacker."

My gosh, somebody shoot me if I ever try to go to this much trouble to screw up a lens.

---Bob Gross---

[nosquare2003]

Somebody will find some fun on "hacking". I'm not skillful enough to take any risks.

[ron chappel]

Lets make this clear in case someone missreads this. :!: :!: :!:

If modified for use on a film camera,the rear glass elements ***WILL*** get hit by the mirror when the lens is at about the 22mm zoom setting or below.
I did it by first focusing then locking up the mirror.It was a fun experiment but totally pointless for day to day use.Because of the strong vignetting at wide angles it is useless on a film camera below 22mm anyway-and canon allready makes a cheap lens of 22-55mm...... :roll:

The info that it works on the D60 and D30 is very usefull!! 8) 8) 8)
I know that's one of the questions that's being asked alot.

[karusel]

I can not find any reason to do this to the cheapo kit lens to be used on a 30D, 60D or even 10D.

[evilenglishman]

I can not find any reason to do this to the cheapo kit lens to be used on a 30D, 60D or even 10D.

i thought the reasons were explained quite well ????????????

[Tomsk]

The obvious camera (to me anyway) to try a hacked EFS lens would be the EOS-IX (or IX7) - Canon's APS SLR.

I've had a look at my EOS-IX and the mirror is about the same size as my 300D.

If Sigma hadn't released their 18-50mm, it would only have been a matter of time before I hacked my 18-55EFS to make it fit my IX.

[karusel]

Evilenglishman, regardless of how many reasons others can find - I cannot find any. I would not think much before saying 'no thanx' to one that would give it to me for free. But that's just me... 8)

[robertwgross]

I can not find any reason to do this to the cheapo kit lens to be used on a 30D, 60D or even 10D.

I give up.

What is a 30D, or what is a 60D?

Who makes them?

---Bob Gross---

[evilenglishman]

I can not find any reason to do this to the cheapo kit lens to be used on a 30D, 60D or even 10D.

I give up.

What is a 30D, or what is a 60D?

Who makes them?

---Bob Gross---

:lol:

[karusel]

Okay, I deserve it. :oops:

I wanted to name a few cameras in no particular order starting with 10D then I thought it would be nicer to order them up a bit, so apparently I invented some new models. I don't always type what I intend to... :roll:

Even if those funky cameras did exist, I would still refuse to put that lens on them.

[robertwgross]

I think you are only allowed to mix up the Canon model numbers if you are an ex-Nikon user.

It always amazes me that some people can ask the most technically involved questions about their camera, but they can't get the model number straight.

In another industry, an irate customer called us for technical support on a product. The regular technical support guy was not available, so I took the call. The irate customer was asking about Model ABC, and he wanted to know why it didn't work right. With tongue-in-cheek, I told him that Model ABC was a piece of crap and it never did work quite right. The irate customer was getting madder. Then I asked him if he was sure that it was a Model ABC, and he said he was sure. I asked him if he could go verify that it was Model ABC, and he stepped away from the phone for just a minute.

He looked at the product and saw that it was Model ABC ... by a competitor company ... not ours. Then he came back to the phone and said "Nevermind".

I was smiling over that one.

---Bob Gross---

[bugs]

I'm just a bit confused here - why on earth would one want to pay $100 for a used Canon 18-55 EF-S lens and then try to modify it for use in an EF mount, when he or she could have just bought the Sigma 18-50mm - just as cheap, and made to fit the EF mount straight out of the fabric...

just my 2 cents.

/Johnny

[timmyquest]

I'm just a bit confused here - why on earth would one want to pay $100 for a used Canon 18-55 EF-S lens and then try to modify it for use in an EF mount, when he or she could have just bought the Sigma 18-50mm - just as cheap, and made to fit the EF mount straight out of the fabric...

just my 2 cents.

/Johnny

What confuses me more is why canon would lie about this...sales pitch?

[robertwgross]

What confuses me more is why canon would lie about this...sales pitch?

What Canon statement do you feel was a lie?

---Bob Gross---

[karusel]

I think he means the - EF-S lens are for Rebel only.

[bugs]

I think he means the - EF-S lens are for Rebel only.

Which they are :D
You still can't buy another camera that will accept the Canon lens unmodified, and modified you've ruined the warranty.

So if needing a cheap 18mm, I'd still opt for the Sigma instead (whops, I just ordered one, but then again, being a tele guy I'm not going to pay ~$800 for wide-angle... better to pay $1500 for a 100-400 L :lol: )

/Johnny

[PacAce]

I think he means the - EF-S lens are for Rebel only.

But they are, aren't they? Without doing a hack job, that is. After all, anything can be made to fit something else, like an L lens on an Pentax, with a hack job. :roll:

[RBarr]

[quote=bugs]I'm just a bit confused here - why on earth would one want to pay $100 for a used Canon 18-55 EF-S lens and then try to modify it for use in an EF mount, when he or she could have just bought the Sigma 18-50mm - just as cheap, and made to fit the EF mount straight out of the fabric...

just my 2 cents.

/Johnny

Probably because of reviews like this:

Pros: Price, compact
Cons: Everything else, especially autofocus

Everything else. The worst thing about this lens is the autofocus. It's plain awful. Noisy, terrible unless you're in a bright surrounding, I mostly just set it in manual mode and save on battery power. It constantly hunts and usually gets it wrong.


Other than that, the image quality is OK, if lacking a bit in sharpness. The lens has a tendancy to look a bit two-dimensional, as someone else pointed out. Oh, and below 28, the lens tends to distort the image something rotten.


I went into a shop today and tried out the 28-70 EX variant, and since they offer a 30 day money back guarantee I will be returning this lens next week. The EX was so much better in focussing and image quality.


If you truely need the cheapest lens money can buy, it does have a metal mounting and it is fairly reasonably made. But you get what you pay for.

________________________________________

Me, I'll take a chopped kit lens. Cheaper, and who doesn't appreciate taking crude tools to a brand new lens?