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sbv20
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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?

This image is copyrighted by the owner

This was the problem:

This image is copyrighted by the owner

The aperture had been stuck closed, ever since taking this picture:

This image is copyrighted by the owner

Weird!

The IS mechanism, really cool:

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Front elements:

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Success!

On a 300d, haha. very light combo now:

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

-Sam

Oct 04, 2008 at 08:37 PM

veroman
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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?

This image is copyrighted by the owner

This was the problem:

This image is copyrighted by the owner

The aperture had been stuck closed, ever since taking this picture:

This image is copyrighted by the owner

Weird!

The IS mechanism, really cool:

This image is copyrighted by the owner

Front elements:

This image is copyrighted by the owner

Success!

On a 300d, haha. very light combo now:

This image is copyrighted by the owner

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 08:39 PM

Alek Komarnits
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p.1 #3 · 17-85 Exposed

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

Oct 04, 2008 at 08:39 PM

EB-1
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p.1 #4 · 17-85 Exposed

Couldn't you buy the replacement part from Canon?

EBH

Oct 04, 2008 at 08:42 PM

ChrisDM
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p.1 #5 · 17-85 Exposed

Cool photos, thanks!

Oct 05, 2008 at 01:15 AM

Dneufarth
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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 05, 2008 at 01:23 AM

CMOS
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p.1 #7 · 17-85 Exposed

Great post!

Oct 05, 2008 at 01:28 AM

azurekenzo
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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 05, 2008 at 01:32 AM

Sam tran
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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 05, 2008 at 01:34 AM

digitalbug30d
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p.1 #10 · 17-85 Exposed

poor thing...

Oct 05, 2008 at 01:40 AM

digitalbug30d
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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 05, 2008 at 01:42 AM

Matt Philbin
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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 05, 2008 at 01:45 AM

Jman13
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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 05, 2008 at 01:52 AM

Gil_W
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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 05, 2008 at 01:55 AM

Joseph C J
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p.1 #15 · 17-85 Exposed

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

Oct 05, 2008 at 02:03 AM

dfresh
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p.1 #16 · 17-85 Exposed

Cool stuff!

Oct 05, 2008 at 02:30 AM

sbv20
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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:

This image is copyrighted by the owner

Oct 05, 2008 at 02:35 AM

kahren
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p.1 #18 · 17-85 Exposed

have you tried taking the same picture with another lens?

Oct 05, 2008 at 02:42 AM

stan_g
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p.1 #19 · 17-85 Exposed

sbv20 wrote:

The IS mechanism, really cool:

This image is copyrighted by the owner

-Sam

Was this a "hand held shot"?

Thanks, I really enjoyed this alot
Stan

Oct 05, 2008 at 02:43 AM

Gil_W
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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 05, 2008 at 02:58 AM

n0b0
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p.1 #21 · 17-85 Exposed

17-85mm pen holder... what next? 800L drain pipe?

Oct 05, 2008 at 03:09 AM

deeprblue
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p.1 #22 · 17-85 Exposed

Why don't you make one of these with it?

Oct 05, 2008 at 01:12 PM

Dark Slider
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p.1 #23 · 17-85 Exposed

I think it decided it was outnumbered by a superior force, in both size and number. It surrendered on the spot.

Oct 05, 2008 at 03:29 PM

Harry T
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p.1 #24 · 17-85 Exposed

Wow really cool stuff one because there is a crap load of stuff jammed in there and the other i used to own a 17-85 myself so it's just cool knowing now what goes inside one of these.

I'd like to see a 70-200 2.8 IS next!

Oct 05, 2008 at 07:33 PM

RGS65
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p.1 #25 · 17-85 Exposed

Cool

Oct 05, 2008 at 09:34 PM


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