I got the 77mm adapter (I have a tokina 12-24 and its diameter is that) on ebay for about 1 euro as at home. For the solder glass can look in any glass or workshop or ask ebay also, just to look on ebay “welding glass.” It took me 4 euros at home as well as density and 11, which would be roughly equivalent to a BW110 or ND400. The dimensions were 80mm x 100mm, which covered perfectly with the diameter of the tokina. Fíajte well and if not, ask the seller.
Before beginning I thought I had to use the filter holder and place the glass there, but to be separated 4-5mm on the front of goal, I made ??a mirror and could see my own objective is reflected in the shots. So I continued with the original idea to stick to the glass ring. Once we finish and you’re glue dry, we can move carefully our microfiber cloth, the same we use to clean lenses and clean the filter a little. Total assembly time 15 minutes.
The first thing I read is that it gave a strong ominante d yellow-green. True, but no problem if we are in Black and White images. So you had set my filter of 10 steps or so. At least for me and for this price. This was a direct result from the camera:
Editor’s Note: Thanks to our friend Ruben (comment 25) we can obtain color images, “depends on the tone of the mask you use, the one I took of the 11 permits to use the images in full color. Simply ACR eyedropper tool you vary the hue and temperature and you’ve got it calibrated in white. “