October 24, 2014, 07:36:14 PM

Author Topic: I Repaired my own 50mm 1.4, and so can you!  (Read 9833 times)

AprilForever

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Re: I Repaired my own 50mm 1.4, and so can you!
« Reply #15 on: September 06, 2013, 08:59:25 AM »
You can bend that piece back a couple of times and then you have to replace the barrel.  It's easier to just always leave the hood on and to develop the habit of just setting the focus to past infinity when you stow the lens.

Also worth noting is that for as deep in as you dug, you're not that much further from being able to replace the focus motor and gear train assembly (it's all one part).  The motor burns out and the gears can tear up.



The Ballad of Brave Sir Fifty

Bravely bold Sir Fifty rode forth from Calumet
He was not afraid to die, O brave Sir Fifty!
He was not at all afraid to be killed in nasty ways,
Brave, brave, brave, brave Sir Fifty!

He was not in the least bit scared to filled with fungal growth,
Or to have his aperture fail, and his blades broken;
To have his casing split, and his motor burned away;
And his gears all hacked and mangled, brave Sir Fifty!

His threads smashed in and his barrel torn out
And his switches popped off and his ribbons unplugged
And his electronics scraped and his mount fall off
And his primary--

The 40 mm lens may pancake, or the 135 focus softly, or the 90 shift and tilt, yet these are not strangers to our lands!
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Re: I Repaired my own 50mm 1.4, and so can you!
« Reply #15 on: September 06, 2013, 08:59:25 AM »

Pinchers of Peril

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Re: I Repaired my own 50mm 1.4, and so can you!
« Reply #16 on: September 06, 2013, 09:13:30 AM »
Wow, hats off to you for doing this!  I got nervous just reading the instructions on the link. 
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Emil

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Re: I Repaired my own 50mm 1.4, and so can you!
« Reply #17 on: September 06, 2013, 10:04:49 AM »
This is what you get for posting on a friday  ;D ;D

"what the what? " I like that.  I'm stealing it for sure!

Welcome Emil, you a scandinavian?

Yes. I suppose I should give a brief introduction about myself.

I am a 23 year old student at the norwegian university of life sciences, who just started writing his master thesis in  analytic organic chemistry. I used to spend most of my spare time playing music and learning new musical instruments. However, ever since I got my first DSLR(600d) about 8 months ago I have been spending a lot of time teaching myself the art of photography. I quickly learned the technical side of it, but I am still very much a novice when it comes to every other aspect of photography. I hope to learn a lot from this forum!
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anthonyd

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Re: I Repaired my own 50mm 1.4, and so can you!
« Reply #18 on: September 06, 2013, 10:15:40 AM »
... I quickly learned the technical side of it, but I am still very much a novice when it comes to every other aspect of photography. I hope to learn a lot from this forum!

and where is the link to your flickr page?

Mt Spokane Photography

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Re: I Repaired my own 50mm 1.4, and so can you!
« Reply #19 on: September 06, 2013, 10:37:49 AM »
... I quickly learned the technical side of it, but I am still very much a novice when it comes to every other aspect of photography. I hope to learn a lot from this forum!

and where is the link to your flickr page?

I had found him on Facebook, but I wasn't absolutely certain it was him at the time. (I was checking for a different Scandinavian  Person)   He sounded like a very astute person with a wide range of talents and impressive, which is why I orginally invited him to tell us more about himself.
 
https://www.facebook.com/oisang

Etienne

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Re: I Repaired my own 50mm 1.4, and so can you!
« Reply #20 on: September 06, 2013, 10:45:15 AM »
Looking at the pics makes me think that the lens design is really bad. It would not take much of a bump to bend that thin bit a metal and ruin the focus.

Rienzphotoz

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Re: I Repaired my own 50mm 1.4, and so can you!
« Reply #21 on: September 06, 2013, 10:58:49 AM »
I am a 23 year old student at the norwegian university of life sciences, who just started writing his master thesis in  analytic organic chemistry. I used to spend most of my spare time playing music and learning new musical instruments. However, ever since I got my first DSLR(600d) about 8 months ago I have been spending a lot of time teaching myself the art of photography. I quickly learned the technical side of it, but I am still very much a novice when it comes to every other aspect of photography. I hope to learn a lot from this forum!
Welcome to CR Emil ... nice to have you here.
I'd like to check out how you fixed your lens, but unfortunately, for some reason, the link you provided (http://image23photographic.blogspot.no/2012/04/fixing-stuck-focus-ring-on-canon-50mm.html) is opening up some arabic blank page ... can you please check and see.
Thanks
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Re: I Repaired my own 50mm 1.4, and so can you!
« Reply #21 on: September 06, 2013, 10:58:49 AM »

Mt Spokane Photography

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Re: I Repaired my own 50mm 1.4, and so can you!
« Reply #22 on: September 06, 2013, 11:06:26 AM »
I am a 23 year old student at the norwegian university of life sciences, who just started writing his master thesis in  analytic organic chemistry. I used to spend most of my spare time playing music and learning new musical instruments. However, ever since I got my first DSLR(600d) about 8 months ago I have been spending a lot of time teaching myself the art of photography. I quickly learned the technical side of it, but I am still very much a novice when it comes to every other aspect of photography. I hope to learn a lot from this forum!
Welcome to CR Emil ... nice to have you here.
I'd like to check out how you fixed your lens, but unfortunately, for some reason, the link you provided (http://image23photographic.blogspot.no/2012/04/fixing-stuck-focus-ring-on-canon-50mm.html) is opening up some arabic blank page ... can you please check and see.
Thanks

It works fine for me, try flushing your browser.

Viggo

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Re: I Repaired my own 50mm 1.4, and so can you!
« Reply #23 on: September 06, 2013, 11:47:29 AM »
Alltid kult med andre nordmenn her :D

I have tried a few shots of the university of Ås , really cool building !
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mrsfotografie

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Re: I Repaired my own 50mm 1.4, and so can you!
« Reply #24 on: September 06, 2013, 11:58:33 AM »
Interesting.

By the way, metal becomes harder and stronger if you bend it a few times, so the resistance to bending improves. On the other hand it will also get more brittle so it will break more easily.

Happy to see this, yet another confirmation that it's a good thing I got the 50 mm Sigma instead of this...
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EOBeav

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Re: I Repaired my own 50mm 1.4, and so can you!
« Reply #25 on: September 06, 2013, 12:10:43 PM »
I've got experience doing this myself. It's not a good experience, but it's experience.

This same thing happened to me a year or so ago. I fixed it myself, but couldn't get the electronic connection back correctly. I ended up sending it to Alpine Camera in Spokane to have a lens guy work on it. In the end, it cost me 2x as much compared to if I had just sent it to them in the first place.

I'm really good at taking things apart. Not so good at putting them back together again.

So, buyer beware if you undertake this yourself. It's do-able, but just know the downside. Mamas, don't let your children make the mistakes I've done.
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Rienzphotoz

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Re: I Repaired my own 50mm 1.4, and so can you!
« Reply #26 on: September 06, 2013, 12:26:37 PM »
I am a 23 year old student at the norwegian university of life sciences, who just started writing his master thesis in  analytic organic chemistry. I used to spend most of my spare time playing music and learning new musical instruments. However, ever since I got my first DSLR(600d) about 8 months ago I have been spending a lot of time teaching myself the art of photography. I quickly learned the technical side of it, but I am still very much a novice when it comes to every other aspect of photography. I hope to learn a lot from this forum!
Welcome to CR Emil ... nice to have you here.
I'd like to check out how you fixed your lens, but unfortunately, for some reason, the link you provided (http://image23photographic.blogspot.no/2012/04/fixing-stuck-focus-ring-on-canon-50mm.html) is opening up some arabic blank page ... can you please check and see.
Thanks

It works fine for me, try flushing your browser.
Thanks ... I used google translate to find out what the Arabic text meant ... apparently it was warning me that this blog might contain some adult content etc ... so I just clicked a red button with some Arabic text (which apparently meant "I understand and wish to continue") and the page opened up  :)
Coming back to the subject, that is a nice step-by-step guide ... if ever my 50mm f/1.4 has a similar problem (I hope it doesn't) I'll try this out. Thanks for sharing Emil.
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Leejo

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Re: I Repaired my own 50mm 1.4, and so can you!
« Reply #27 on: September 06, 2013, 12:47:24 PM »
I followed the same instructions around two months ago, and it looks like I will have to do the same again having dropped the lens again :-(
I did use the one link (to the site in Romania for a few additional pictures)
The instructions could be marginally improved - e.g. step 7 better explained.
What is blatantly missing are the instructions for reassembly, as the odd step or two does require the pieces in the right position, and just how tight the screws should be etc.
Having had three disassembly and assembly operations goes before my lens worked first time though I have the details now in my head....
The steps - of unclipping the element and unattaching and feeding through the cable were the most scary/difficult.
I was forced out of necessity as well. I bought the lens used, and the repair costs would have been around the same cost - and I needed the lens for an upcoming wedding quickly (private not professional).
I was glad to have performed the task - even if it did take several hours.
I do have an engineering background and some experience in such things, so I was of course less nervous than some might be!

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Re: I Repaired my own 50mm 1.4, and so can you!
« Reply #27 on: September 06, 2013, 12:47:24 PM »

mrsfotografie

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Re: I Repaired my own 50mm 1.4, and so can you!
« Reply #28 on: September 06, 2013, 01:35:34 PM »
...
What is blatantly missing are the instructions for reassembly, as the odd step or two does require the pieces in the right position, and just how tight the screws should be etc.
...
I do have an engineering background and some experience in such things, so I was of course less nervous than some might be!

Well if you have an engineering background you must know that all screws, nuts and bolts must be tightened to the point where they make a sickening snapping noise. Then tighten it 1/4 of a turn more and you're fine! :)

In all seriousness, if you have a set of micro screwdrivers, the screws should never be tichtened more than you are able to achieve with the ribbed screwdriver between your fingers. Never use an extension or pliers to get more torque. All proper hand tools are designed with torque arms based on the average person's strength. Obviously this doesn't apply to adjustable spanners. Oh, and when in doubt don't overdo the torque but use a little loctite (the easy to loosen type).
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dgatwood

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Re: I Repaired my own 50mm 1.4, and so can you!
« Reply #29 on: September 06, 2013, 02:02:54 PM »
By the way, metal becomes harder and stronger if you bend it a few times, so the resistance to bending improves. On the other hand it will also get more brittle so it will break more easily.

Out of curiosity, is there enough clearance that you could add a layer of solder to thicken the metal piece in question?

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Re: I Repaired my own 50mm 1.4, and so can you!
« Reply #29 on: September 06, 2013, 02:02:54 PM »