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Archive 2008 · 17-85 Exposed

sbv20
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p.1 #1 · p.1 #1 · 17-85 Exposed

I took apart my broken 17-85 as I decided it wasn't worth fixing. Thought some of you might find it interesting.

How does it all fit in there?
http://samboyko.com/files/fm/17851.jpg

This was the problem:
http://samboyko.com/files/fm/17852.jpg

The aperture had been stuck closed, ever since taking this picture: http://samboyko.com/Italy/week09_spring_break/images/img_5871.jpg
Weird!

The IS mechanism, really cool:
http://samboyko.com/files/fm/17853.jpg

Front elements:
http://samboyko.com/files/fm/17854.jpg

Success!
http://samboyko.com/files/fm/17855.jpg

On a 300d, haha. very light combo now:
http://samboyko.com/files/fm/17856.jpg

I still have all the parts if anyone is curious about something in particular.

-Sam

Oct 04, 2008 at 03:37 PM

veroman
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p.1 #2 · p.1 #2 · 17-85 Exposed

sbv20 wrote:
I took apart my broken 17-85 as I decided it wasn't worth fixing. Thought some of you might find it interesting.

How does it all fit in there?
http://samboyko.com/files/fm/17851.jpg

This was the problem:
http://samboyko.com/files/fm/17852.jpg

The aperture had been stuck closed, ever since taking this picture: http://samboyko.com/Italy/week09_spring_break/images/img_5871.jpg
Weird!

The IS mechanism, really cool:
http://samboyko.com/files/fm/17853.jpg

Front elements:
http://samboyko.com/files/fm/17854.jpg

Success!
http://samboyko.com/files/fm/17855.jpg

On a 300d, haha. very light combo now:
http://samboyko.com/files/fm/17856.jpg

I still have all the parts if anyone is curious about something in particular.

-Sam

Bravo. Really fascinating glimpse into the inner workings of a lens. Thanks for taking the time.

- Steve

Oct 04, 2008 at 03:39 PM

Alek Komarnits
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p.1 #3 · p.1 #3 · 17-85 Exposed

WOW - that was cool - impressive how much stuff they pack inside there.

Oct 04, 2008 at 03:39 PM

EB-1
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p.1 #4 · p.1 #4 · 17-85 Exposed

Couldn't you buy the replacement part from Canon?

EBH

Oct 04, 2008 at 03:42 PM

ChrisDM
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p.1 #5 · p.1 #5 · 17-85 Exposed

Cool photos, thanks!

Oct 04, 2008 at 08:15 PM

Dneufarth
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p.1 #6 · p.1 #6 · 17-85 Exposed

I will be even more impressed if you put it back together. This is really cool, thanks, Derek

Oct 04, 2008 at 08:23 PM

CMOS
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p.1 #7 · p.1 #7 · 17-85 Exposed

Great post!

Oct 04, 2008 at 08:28 PM

azurekenzo
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p.1 #8 · p.1 #8 · 17-85 Exposed

Lol, I may follow you soon. My 17-85mm is broken too even I didnt touch it since I move to fullframe (it was fine before I got my 5D). $200 to fix the USM is not worth at all.

Oct 04, 2008 at 08:32 PM

Sam tran
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p.1 #9 · p.1 #9 · 17-85 Exposed

I will be even more impressed if you put it back together.
Right on dude! let do the reverse engineering and manufacture your own L-lens from it...

Just imagined if I have the 24-70mm f/2.8 lens as my pencils holder. Way too cool!!!

Oct 04, 2008 at 08:34 PM

digitalbug30d
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p.1 #10 · p.1 #10 · 17-85 Exposed

poor thing...

Oct 04, 2008 at 08:40 PM

digitalbug30d
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p.1 #11 · p.1 #11 · 17-85 Exposed

you could start a new thread blow up your L lens, have a lens of the week..next week we take apart a 200 f2L just for kicks...

Oct 04, 2008 at 08:42 PM

Matt Philbin
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p.1 #12 · p.1 #12 · 17-85 Exposed

Dneufarth wrote:
I will be even more impressed if you put it back together. This is really cool, thanks, Derek

Oct 04, 2008 at 08:45 PM

Jman13
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p.1 #13 · p.1 #13 · 17-85 Exposed

Really funny that the aperture stuck after taking a picture with tons of closed down aperture looking designs. Creepy.

Oct 04, 2008 at 08:52 PM

Gil_W
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p.1 #14 · p.1 #14 · 17-85 Exposed

OK I'll ask:
Are you serious about the last shot being that window or gate or what ever it is? Come on!

If it's true, that IS weird and never take a shot of it again with any lens.

Thanks for the 17-85 exposed shots, neat'o.

Gil

Oct 04, 2008 at 08:55 PM

Joseph C J
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p.1 #15 · p.1 #15 · 17-85 Exposed

Awesome... I really enjoyed this post... thanks for sharing...

Oct 04, 2008 at 09:03 PM

dfresh
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p.1 #16 · p.1 #16 · 17-85 Exposed

Cool stuff!

Oct 04, 2008 at 09:30 PM

sbv20
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p.1 #17 · p.1 #17 · 17-85 Exposed

Hey guys thanks for all the positive comments, glad everyone enjoyed.

Now that I've done it, I think I could've reassembled it with a replacement part, but only if I had kept thorough track of what went where. Also, I totally stripped at least 3 screws in the process. Overall, the inner workings were a bit more complex than I expected, but it was a nice linear process taking it apart.

Yes, I'm serious about that being the last photo before the aperture stuck. It's the Arab-Islamic museum in Paris. The apertures open and close to regulate the light inside. It's mostly just a cool dynamic thing to keep people interested, I think:
http://samboyko.com/Italy/week09_spring_break/images/img_5876.jpg

Oct 04, 2008 at 09:35 PM

kahren
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p.1 #18 · p.1 #18 · 17-85 Exposed

have you tried taking the same picture with another lens?

Oct 04, 2008 at 09:42 PM

stan_g
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p.1 #19 · p.1 #19 · 17-85 Exposed

sbv20 wrote:
The IS mechanism, really cool:
http://samboyko.com/files/fm/17853.jpg

-Sam

Was this a "hand held shot"?

Thanks, I really enjoyed this alot
Stan

Oct 04, 2008 at 09:43 PM

Gil_W
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p.1 #20 · p.1 #20 · 17-85 Exposed

I like the idea of the apertures closing with the sunshine. Sounds good for summer.
The outside border apertures have the same number of blades as your 17-85! It's the 6 bladed aperture curse!!!

Amazing coincidence!
Gil

Oct 04, 2008 at 09:58 PM

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