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Who woulda' thought a carpet beetle would look like this?

 
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rjlittlefield



Joined: 06 May 2005
Posts: 727
Location: Richland, WA, USA

PostPosted: Wed May 03, 2006 12:19 am    Post subject: Who woulda' thought a carpet beetle would look like this? Reply with quote





These beetles are quite interesting -- they are the only ones I know that have wing covers that are covered with scales!

The larvae are scavengers, specializing in high protein left-overs like skin flakes and dead critters. They can wreak havoc in an insect collection. (You can trust me on this... Sad ) The adults are fairly innocuous. My bug book says that some of them are even found on flowers.

This particular specimen turned up in my windowsill. I relocated it to what I presume is kind of its "natural environment" -- a chunk of nylon carpet -- the better to photograph.

--Rik

Technical...

These pics are from playing around with my "new" (eBay'd) Olympus Zuiko 38mm f/2.8 bellows lens, specially designed for macro Very Happy and no longer being made. Sad

This lens gives a minimum working distance of 33mm from closest point to the subject. Lots of freedom for illumination. And the thing is at its sharpest wide open, reputed to resolve 320 lines/mm on the subject. (No, I haven't measured it, and I don't intend to -- the test target would cost more than the lens!)

Stacked, of course. 0.002" at f/4 and 0.0005" at f/2.8. CombineZ5 for the first, Helicon Focus for the second.
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Wim van Egmond



Joined: 08 Apr 2005
Posts: 440
Location: Rotterdam, the Netherlands

PostPosted: Wed May 03, 2006 3:55 am    Post subject: Reply with quote

For such magnifications we can truly use the word magnificent! Smile

Wim
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MikeBinOKlahoma



Joined: 20 Nov 2004
Posts: 1491
Location: Umm....Could it be Oklahoma?

PostPosted: Wed May 03, 2006 5:52 pm    Post subject: Reply with quote

That's why it is a carpet beetle, you know...Because it has leftover 1970s shag carpet all over it's back! Razz

Very impressive. I see I'm gonna have to finally cave and check into this stacking stuff myself....
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Mike Broderick
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"I must obey the inscrutable exhortations of my soul.....My mandate includes weird bugs."--Calvin

(reposts on this site of my images for critique or instruction are welcome)
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Ken Ramos
Site Admin


Joined: 04 May 2004
Posts: 4809
Location: Western North Carolina

PostPosted: Wed May 03, 2006 5:57 pm    Post subject: Reply with quote

These things are or could be in my carpet?! Shocked Hmm...gotta put malathion on my grocery list or maybe some pyrethrine. Wink Good photographs! Very Happy
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Kenneth Ramos
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Kens Microscopy
Reposts of my images within the galleries are welcome, as are constructive critical critiques.
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rjlittlefield



Joined: 06 May 2005
Posts: 727
Location: Richland, WA, USA

PostPosted: Thu May 04, 2006 9:11 pm    Post subject: Reply with quote

MikeBinOKlahoma wrote:
I see I'm gonna have to finally cave and check into this stacking stuff myself....
Wim van Egmond wrote:
For such magnifications we can truly use the word magnificent! Smile

Mike, it's good to see another potential convert. I have to warn you, though, this technique doesn't lend itself to spontaneity. Wink

Wim, thanks! Very Happy

There is much similarity between this setup and what Wim does with his Leitz Photar. Both lenses are optimized for these magnifications and act like microscope objectives with variable apertures. The Olympus 38mm at f/2.8 acts roughly like NA 0.15, giving maximum usable magnification of about 150X.

It's the extended depth of field that makes things marvelous, letting me open up for best resolution while still getting good DOF.

Here's a single frame. The software put together 56 of these images to make the sharp-everywhere composite.



You can see the full-resolution composite here.

--Rik
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