Today is the third series of how the extension tube for Samsung NX camera was made. In the last posting, we looked at the ‘idea and design’ of the extension tube. In this posting, we will see how it was produced and assembled.
First of all, I used the recently purchased Rapid Prototype machine to make a 22mm extension tube. The image below shows the different components that go into the 22mm extension tube based on the basic design.
The following image shows how the pogo pins and the contact pin holders have been assembled. The compression spring is built-in and inside of the pogo pin.
Although I paid close attention, some of the pins were made in the wrong size. Because of the error, I was not able to fully assemble the lens removal button, but the assembly proved to be meaningful nonetheless as I was able to check the functionality of all the mounting contacts.
The two pictures above are the prototypes of extension tube, which will be made in black plastic later on.
The assembly of the prototype extension tube was not perfect, but it could be used for taking sample macro shots. As I mentioned previously in the interview, it was my very first time taking macro photos. I found that close-up shots bring to light, a totally different world!
As a first test, I used an 18-54 kit lens to take sample photos at 55mm. Although I used a 22mm extension tube, I felt as if the focus area from the lens to the object was only 3-4cm. It supports not only AF, but also diaphragm adjustment and DMF (dynamic manual focus). I guess that is the natural result of having all contact points mounted in the right place!
The next image is a bundle 55mm macro. It’s an unknown object with a diameter less than 5mm.
Next is NX 30mm pancake lens.
I plan to revise the design based on today’s testing, and remake the extension tube set sample for 14mm, 22mm and 32mm.
In the next posting, you will be able to see somewhat of a complete extension tube. Aren’t you anxious to see the production process and how the design might have changed? Make sure to tune in again!