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04-06-2011, 07:43 PM - 14 Likes   #1
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DA-L 18-55mm X-Ray

I was wondering what the interior of a lens look like particularly the screwdrive AF of a Pentax lens but I didn’t really want to dissect one. For those who are curious on what it looks like, I went ahead and x-rayed my DAL 18-55mm. Here are the images...

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04-06-2011, 07:54 PM   #2
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Very very awesome.

You didn't like, break into a medical center to borrow their x-ray machine did you?

Dunno if you still can, but maybe you should do an x-ray shot of the lens at 18mm focal length and then at 55mm fl...
04-06-2011, 07:55 PM   #3
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Cool!
04-06-2011, 09:32 PM   #4
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QuoteOriginally posted by Ole Quote
Cool!
+1, very cool.....

04-06-2011, 09:46 PM   #5
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very nice!
04-06-2011, 09:48 PM   #6
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Thanks!
QuoteOriginally posted by Vylen Quote
Very very awesome.

You didn't like, break into a medical center to borrow their x-ray machine did you?

Dunno if you still can, but maybe you should do an x-ray shot of the lens at 18mm focal length and then at 55mm fl...
I pretended to be a member of the janitorial staff…

The images above are at 18mm. I think I can “mop the floor” one more time for 55mm x-rays..
04-06-2011, 10:43 PM   #7
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X-ray video of the lens zooming and focussing?
04-07-2011, 01:50 AM   #8
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QuoteOriginally posted by sewebster Quote
X-ray video of the lens zooming and focussing?
Are you volunteering your hands to operate it?

04-07-2011, 03:22 AM   #9
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Cool.
It puzzles me to see a rather sizable integrated circuit in there. What would it be doing? All the action (screw drive motor, AF system, stabilisation etc) is taking place in the body.
04-07-2011, 06:46 AM   #10
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QuoteOriginally posted by rawr Quote
Cool.
It puzzles me to see a rather sizable integrated circuit in there. What would it be doing? All the action (screw drive motor, AF system, stabilisation etc) is taking place in the body.
Its reporting on the type of lens it is, along with the current aperture, and I believe to some degree the focus distance (far - infinity, near.... Pentax does not report in feet or and inches, but rather in various zones from what I have seen in PhotoMe).

Nice images - did not realize all the parts......


Last edited by interested_observer; 04-07-2011 at 07:38 AM.
04-07-2011, 07:04 AM   #11
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whoa that is very cool!
04-07-2011, 08:39 AM   #12
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Interesting. The "mostly plastic" DA-L series are probably the best for showing the mechanics via x-ray, but I'd still be interested in seeing just how complex and tightly packed a Limited would be.
04-07-2011, 07:26 PM - 1 Like   #13
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QuoteOriginally posted by Vylen Quote
Dunno if you still can, but maybe you should do an x-ray shot of the lens at 18mm focal length and then at 55mm fl...
Here you go; 1-2 are at 18mm, 3-4 at 55mm. Fifth one is head-on image. Now I'm curious what an SDM in a DA* looks like...

QuoteOriginally posted by sewebster Quote
X-ray video of the lens zooming and focussing?
I wish there was a way..
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Last edited by K57XR; 04-07-2011 at 07:39 PM.
04-08-2011, 01:44 PM   #14
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It's very interesting to see this, thanks for sharing this with us!
04-08-2011, 01:47 PM   #15
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That's actually pretty cool. It amazes me how intricate lenses are, especially high quality lenses.
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