Cidade do Samba, Rio de Janeiro

The lack of ductility of glass prevents the equalization of stresses at local irregularities or flaws and the breakage strength varies considerably about a mean value. This latter is found to occur at a tensile strength of about 700kg/cm2

Belgian Air Component F 16A MLU landing at RNAS Yeovilton

This is the rear layer of the final product.

Eye-Piece for binoculars with dioptrics adjustment

Component of a large pair of binoculars

This item is surplus to my collection needs. I am making this available for swap or trade. Please let me know if you are interested. See these sets of images for other cameras, lenses and photographic paraphernalia that I am removing as I am sharpening the focus of my camera collection.

Image shot with an Olympus Stylus TG-3.

© Dirk HR Spennemann 2014, All Rights Reserved

Access all my images via the Collections Page

LEM sets new benchmark for accuracy in Rogowski coil sensors

This will be a small, simple bot. Hopefully.

Nearing completion.

The main components assembled, this time with the skin and tail piece fitted.

The white areas on the skin are talcum powder that wasn't completely removed during the soaking process.

The skin has been stained brown using instant coffee granules.

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Angled prism in housing, component of a pair of binoculars

This item is surplus to my collection needs. I am making this available for swap or trade. Please let me know if you are interested. See these sets of images for other cameras, lenses and photographic paraphernalia that I am removing as I am sharpening the focus of my camera collection.

Image shot with an Olympus Stylus TG-3.

© Dirk HR Spennemann 2014, All Rights Reserved

Access all my images via the Collections Page

Components inside Plasma Furnace during process

Secretary of Homeland Secretary Kristi Noem holds a component meeting at DHS Headquarters in Washington, D.C., Oct. 28, 2025. (DHS photo by Tia Dufour)

Angled prism in housing, component of a pair of binoculars

This item is surplus to my collection needs. I am making this available for swap or trade. Please let me know if you are interested. See these sets of images for other cameras, lenses and photographic paraphernalia that I am removing as I am sharpening the focus of my camera collection.

Image shot with an Olympus Stylus TG-3.

© Dirk HR Spennemann 2014, All Rights Reserved

Access all my images via the Collections Page

Nearing completion.

The main components assembled, this time with the skin and tail piece fitted.

The white areas on the skin are talcum powder that wasn't completely removed during the soaking process.

The skin has been stained brown using instant coffee granules.

In the home theater I am building my component cabinet today.

With London Fixie Bike 18t ISO cog (now VeloSolo).

Secretary of Homeland Security Kristi Noem, not shown, holds a component meeting at DHS Headquarters in Washington, D.C., Jan. 21, 2026. (DHS photo by Tia Dufour)

macro practice

Secretary of Homeland Security Kristi Noem, not shown, holds a component meeting at DHS Headquarters in Washington, D.C., Jan. 21, 2026. (DHS photo by Tia Dufour)

87499294 :Piction ID--Component closeup---Please tag these photos so information can be recorded.---- Digitization of this image made possible by a grant from NEH: NEH and the San Diego Air and Space Museum

*+stennamayNSCADPink2

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Secretary of Homeland Security Kristi Noem, not shown, holds a component meeting at DHS Headquarters in Washington, D.C., Jan. 21, 2026. (DHS photo by Tia Dufour)

Component failure during the egg toss.

Could look like a model kit

component.

Shimano Ultegra. The RD looks a tad rough, but was the only example I could find quickly that wasn't being bid up the yinyang on That Auction Site.