Wednesday, November 12, 2008

YSM35B Asian Macro Tube to 58mm Thread

This is the first in the series of instructions on how to build the YSM35B Vibrating 35mm DOF Adapter based on the parts lists of the YSM35(A). The build will be nearly the same except I'll be using a 58mm Opteka HD^2 Macro plus a smaller power pack.

At the end of this series you will know how you could build one yourself. Or know enough about how one is built to diagnose problems with your existing adapter.

Putting a 58mm Thread on the Nikon Macro Tube
For this part we'll recap how to modify an "Asian Macro Tube" with Nikon F Mount to have a standard 58mm filter ring. You will need the following items:

Asian Macro Tube with Nikon F-mount
58mm UV Filter
Two Part Epoxy (e.g. JB Weld)
2 Flat Head precision screw drivers (or a drawing compass)
Plastic Card
Isopropyl Alcohol

Use a non-slip pad to remove the glass from the UV filter. We only want the ring to convert the 57mm tube to 58mm. Use the two screwdrivers or compass (the drawing tool not the magnetic direction finder) to twist the inner ring counterclockwise. Applying downward pressure helps. This will unfasten the ring. Once you have it out remove this retaining ring and the glass.

Take the Asian Macro and find the "1" ring. Set the rest side. You can discard the ring with the bayonet mount. Clean both the filter thread and the "1" ring with isopropyl alcohol. Set aside.

Mix the two part epoxy on a piece of carton or paper with a paper clip. JB Weld is good. There is a white and black tube. The black one is harder to get the contents out. You will get a grey goop. Apply the goop to the rear thread of the "1" ring. Make sure to have some all around. Then stack the 58mm filter on top of this. The epoxy may get squeezed out on the sides and the inside between the threads.

Press and hold for a few seconds. While the goop is still soft use the plastic card to scrape the excess from the outside. Inspect the front inner thread of the "1" ring and the rear outer thread of the 58mm filter. Clean out any goop on it. Allow this to cure for 24 hours. It will cure faster in warm weather.

Why did we do this?
The Asian Macro tube is the body for the adapter. The ones off Ebay were 1mm too small. We need a standard 58mm thread to attach a macro, circular filter, and 43mm to 58mm step up ring later.

What is next?

The next post will be about how to build the vibrating mount.

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