35mm DOF adapter parts…
As promised, here’s the explanation on how I built my 35mm depth of field adapter. First, here’s a close up shot of the adapter with all the parts marked:
Everything on that image is fairly self explanatory. Almost all of the parts I purchased on eBay, minus a few things. Besides my camcorder, I also did not purchase on eBay the 55mm to Canon EOS extension tube step up ring and the holder for the Nikon F3 focus screen. I purchased these parts from Daniel’s site.
The build is also fairly self explanatory as everything just screws together. The trickiest part is the ground glass/focus screen installation. I used Daniel’s static focus screen holder which looks like this:
The focus screen goes inside the square cut out in the holder, and the holder is then placed inside the Canon EOS extension tube with two screws on each side of the holder which expands it just enough to hold it in place. There are two caveats with this, however. First, the shiny side of the focus screen must be facing the 35mm SLR lens. Second, you must place the focus screen the exact flange focal distance from the SLR lens. This is alot easier said than done. I basically put the holder and screen in the tube and manipulated it until I got proper infinity focus. I also had to be very careful not to touch the ground glass during this as a finger print would ruin it.
Also, you maybe wondering what the purpose is of the 55mm polarizer filter with the glass removed. This is so you can twist the body of the adapter to allow the ground glass to be in the same horizontal plane of the camcorder. And since I only wanted the mechanical part of the filter, I got rid of the glass.
So there it is. Any questions on the adapter, just leave a comment.
Posted by g1powermac under Filming | Comments Off