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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 27 Apr 2010 (Tuesday) 13:40
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EF-S 18-55 IS -> EF conversion FAIL!

 
evilr00t
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Apr 27, 2010 13:40 |  #1

Here I documented my own efforts at modifying an 18-55 IS to fit the EF mount; I failed because I couldn't figure out how to sand the lens down to fit the mount without destroying the IS sensors.

Old post wrote:
="Old post"]Having converted the EF-S 18-55 II to EF mount, I decided to try with my new 18-55 IS.

Result? The EF-S 18-55 IS can't be converted to the EF mount. Vibration? sensors are housed in the EF-S mount, precluding an easy conversion that preserves proper IS functionality.

( from https://photography-on-the.net …p?p=10183063&po​stcount=17 )
but the story gets better! I found someone on FM who had done what I believed to be impossible...

I obtained another 18-55IS, pre-modified by an FMer (purchased from http://www.fredmiranda​.com/forum/topic/89750​9/ (external link)), and the first thing I did was to take shots at 18mm on a 1D Mark III. Yes, I'm insane, and it hit the mirror, giving me an Err 20. For all you lens hackers out there, the mirror is a lot more durable than you think and was completely unharmed -- however, the glass coating got smudged (which was later removed with q tips and alcohol - no permanent damage).

However, it does work at 19mm or so (the lens focal length encoder seems to not have a 19mm setting - it'll display 18 or 20) - the mirror barely hits the lens at 18mm. And while the corners aren't soft, they aren't exactly pretty either - they have extreme distortion.

This picture is the first -- and last -- picture my 1D3 will ever take at 18mm (w/ the lens zoom stop at the widest end)


XTi, 1D3, 2x SB-28, 580EX, 550EX, Tamron 28-75, 50/1.8, "EF" 18-55 II, "EF" 18-55 IS, 85/1.8, 75-300 III USM, 70-200/4L

  
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dmo580
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Apr 27, 2010 13:58 |  #2

pics? of both?


Canon 7D & Rebel T1i: Tokina 11-16mm f/2.8, Canon 17-55mm f/2.8 IS, Canon 55-250mm IS, Canon 28 f/1.8, Speedlite 580EX II, Speedlite 430EX II

  
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evilr00t
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Apr 27, 2010 14:02 |  #3

dmo580 wrote in post #10076581 (external link)
pics? of both?

I wish. I didn't have a camera with a lens on it at the time. Both still work, though probably dirtier than when I started out.


XTi, 1D3, 2x SB-28, 580EX, 550EX, Tamron 28-75, 50/1.8, "EF" 18-55 II, "EF" 18-55 IS, 85/1.8, 75-300 III USM, 70-200/4L

  
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Jardiniboy
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Apr 27, 2010 14:15 |  #4

You would need to shave part of the rear mount of lens.

http://www.bobatkins.c​om …hy/tutorials/ef​s-10d.html (external link)


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evilr00t
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Apr 27, 2010 15:11 |  #5

Jardiniboy wrote in post #10076688 (external link)
You would need to shave part of the rear mount of lens.

http://www.bobatkins.c​om …hy/tutorials/ef​s-10d.html (external link)

You can't do that; there are sensors mounted in the part that needs to be shaved off.


XTi, 1D3, 2x SB-28, 580EX, 550EX, Tamron 28-75, 50/1.8, "EF" 18-55 II, "EF" 18-55 IS, 85/1.8, 75-300 III USM, 70-200/4L

  
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msowsun
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Apr 27, 2010 17:34 |  #6

Here is a photo showing the wiring in the back of the 18-55 IS mount. It does appear as though it would cause a problem. It might still be possible to modify the mount, but it will not be as easy as the non-IS version.

IMAGE: http://i2.photobucket.com/albums/y17/msowsun/photo%20stuff/Photo2/IMG_0938.jpg

Mike Sowsun / S110 / SL1 / 80D / EF-S 24mm STM / EF-S 10-18mm STM / EF-S 18-55mm STM / EF-S 18-135mm STM / EF-S 18-135mm USM / EF-S 55-250mm STM / 5D3 / Samyang 14mm 2.8 / EF 40mm 2.8 STM / EF 50mm 1.8 STM / EF 100mm 2.0 USM / EF 100mm 2.8 USM Macro / EF 24-105mm IS / EF 70-200mm 2.8L IS Mk II / EF 1.4x II
Full Current and Previously Owned Gear List over 40 years Flickr Photostream (external link)

  
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kitacanon
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Apr 27, 2010 18:48 |  #7

Even if you were not going to get IS, wouldn't the conversion be worth it for the optics alone? A $100 wide angle lens is still worth it isn't it, especially when compared to the earlier version, and any other alternative?
What body were you thinking of putting it on....?


My Canon kit 450D/s90; Canon lenses 18-55 IS, 70-210/3.5-4.5....Nikon kit: D610; 28-105/3.5-4.5, 75-300/4.5-5.6 AF, 50/1.8D Nikkors, Tamron 80-210; MF Nikkors: 50/2K, 50/1.4 AI-S, 50/1.8 SeriesE, 60/2.8 Micro Nikkor (AF locked), 85mm/1.8K-AI, 105/2.5 AIS/P.C, 135/2.8K/Q.C, 180/2.8 ED, 200/4Q/AIS, 300/4.5H-AI, ++ Tamron 70-210/3.8-4, Vivitar/Kiron 28/2, ser.1 70-210/3.5, ser.1 28-90; Vivitar/Komine and Samyang 28/2.8; 35mm Nikon F/FM/FE2, Rebel 2K...HTC RE UWA camera

  
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evilr00t
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Apr 27, 2010 20:13 |  #8

kitacanon wrote in post #10078337 (external link)
Even if you were not going to get IS, wouldn't the conversion be worth it for the optics alone? A $100 wide angle lens is still worth it isn't it, especially when compared to the earlier version, and any other alternative?
What body were you thinking of putting it on....?

Currently have the 18-55 II on an Elan IIe. Would be moving to a 1D3 or 5D2 sometime very soon, so it would be nice to have a ultra wide angle.


XTi, 1D3, 2x SB-28, 580EX, 550EX, Tamron 28-75, 50/1.8, "EF" 18-55 II, "EF" 18-55 IS, 85/1.8, 75-300 III USM, 70-200/4L

  
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nureality
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Apr 27, 2010 20:29 |  #9

Have you bothered to develop any film yet? You're gonna get vignetting from about 18-30mm, which begs the question... whats the point?


Alan "NuReality" Fronshtein
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evilr00t
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Apr 27, 2010 20:48 |  #10

nureality wrote in post #10078895 (external link)
Have you bothered to develop any film yet? You're gonna get vignetting from about 18-30mm, which begs the question... whats the point?

I've developed four rolls of film, and get vignetting at 20mm and lower. A 20-55 lens is pretty darned wide, compared to the rest of my kit.


XTi, 1D3, 2x SB-28, 580EX, 550EX, Tamron 28-75, 50/1.8, "EF" 18-55 II, "EF" 18-55 IS, 85/1.8, 75-300 III USM, 70-200/4L

  
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nureality
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Apr 27, 2010 21:56 |  #11

I find that very hard to believe. Its not designed as a 20mm (wide-end) FF lens. And for good reason, its damn difficult to do so - thats why such lenses cost so much. They require very difficult lens geometry, which I'm afraid to say, the 18-55 does not have.

The 18-55 is essentially a reverse-engineered (if you will) version of the 28-90's old. None of those were any good either.


Alan "NuReality" Fronshtein
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Lots of Fun, Lots of Laughs, Happy Trigger Finger!

  
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evilr00t
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Apr 28, 2010 10:58 |  #12

nureality wrote in post #10079408 (external link)
I find that very hard to believe. Its not designed as a 20mm (wide-end) FF lens. And for good reason, its damn difficult to do so - thats why such lenses cost so much. They require very difficult lens geometry, which I'm afraid to say, the 18-55 does not have.

The 18-55 is essentially a reverse-engineered (if you will) version of the 28-90's old. None of those were any good either.

Shot 20-21mm on film. And yes, the corners are absolute disasters qualitywise - so bad it shows up in a 4x6.


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XTi, 1D3, 2x SB-28, 580EX, 550EX, Tamron 28-75, 50/1.8, "EF" 18-55 II, "EF" 18-55 IS, 85/1.8, 75-300 III USM, 70-200/4L

  
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kitacanon
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Apr 28, 2010 12:05 |  #13

Okay, it works...now...how well does it work when the corners no longer negatively impact the image?

If it were a good 24mm/F4 lens (say @ 5.6-F8 ) on a full frame camera, at $100 it would be a very reasonable lens to have around...

Once you get to 28mm you have the 24-105/3.5-4.5 EF, a very nice lens for $100-140, or the 28/1.8 for a bit more....and by 35mm you have the 35/2, also for a bit more, so the only real advantage for the conversion would be @24...and THAT I would very much like to see...

Any chance of posting a 24mm shot? Thanx...


My Canon kit 450D/s90; Canon lenses 18-55 IS, 70-210/3.5-4.5....Nikon kit: D610; 28-105/3.5-4.5, 75-300/4.5-5.6 AF, 50/1.8D Nikkors, Tamron 80-210; MF Nikkors: 50/2K, 50/1.4 AI-S, 50/1.8 SeriesE, 60/2.8 Micro Nikkor (AF locked), 85mm/1.8K-AI, 105/2.5 AIS/P.C, 135/2.8K/Q.C, 180/2.8 ED, 200/4Q/AIS, 300/4.5H-AI, ++ Tamron 70-210/3.8-4, Vivitar/Kiron 28/2, ser.1 70-210/3.5, ser.1 28-90; Vivitar/Komine and Samyang 28/2.8; 35mm Nikon F/FM/FE2, Rebel 2K...HTC RE UWA camera

  
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evilr00t
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Apr 28, 2010 12:45 |  #14

kitacanon wrote in post #10082734 (external link)
Okay, it works...now...how well does it work when the corners no longer negatively impact the image?

If it were a good 24mm/F4 lens (say @ 5.6-F8 ) on a full frame camera, at $100 it would be a very reasonable lens to have around...

Once you get to 28mm you have the 24-105/3.5-4.5 EF, a very nice lens for $100-140, or the 28/1.8 for a bit more....and by 35mm you have the 35/2, also for a bit more, so the only real advantage for the conversion would be @24...and THAT I would very much like to see...

Any chance of posting a 24mm shot? Thanx...

I'm not about to rip my 18-55IS apart again to try at 24mm, but the 18-55 II has never been a corner master, even on 1.6x crop. In any case, I won't have pictures for a while since I have to finish shooting the current roll of film first, then get it scanned, etc. Digital folks have it easy!

EDIT: And no, I don't have a 24mm shot. I used the lens at 20-21mm the entire time I had it on the camera - just way too cool to not use that setting!


XTi, 1D3, 2x SB-28, 580EX, 550EX, Tamron 28-75, 50/1.8, "EF" 18-55 II, "EF" 18-55 IS, 85/1.8, 75-300 III USM, 70-200/4L

  
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kitacanon
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Apr 28, 2010 15:50 |  #15

Well...I've got this thread bookmarked if you can get more pix posted...thanks....


My Canon kit 450D/s90; Canon lenses 18-55 IS, 70-210/3.5-4.5....Nikon kit: D610; 28-105/3.5-4.5, 75-300/4.5-5.6 AF, 50/1.8D Nikkors, Tamron 80-210; MF Nikkors: 50/2K, 50/1.4 AI-S, 50/1.8 SeriesE, 60/2.8 Micro Nikkor (AF locked), 85mm/1.8K-AI, 105/2.5 AIS/P.C, 135/2.8K/Q.C, 180/2.8 ED, 200/4Q/AIS, 300/4.5H-AI, ++ Tamron 70-210/3.8-4, Vivitar/Kiron 28/2, ser.1 70-210/3.5, ser.1 28-90; Vivitar/Komine and Samyang 28/2.8; 35mm Nikon F/FM/FE2, Rebel 2K...HTC RE UWA camera

  
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EF-S 18-55 IS -> EF conversion FAIL!
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