I have a 3.5/5 Tessar that will be used on a Contax II. I came across this thread while thinking about finding filters and lens hoods for it. From what I learned here I decided to try a few options. The picture below shows what I came up with.
Going down the vertical rows from the left and top:
First row is the lens, a black and silver face from about 1931. The lens cover is from another Lomo lens and is about 1-7/8 ID and fits nicely over the outside
Second row is a 35mm film container cap, a Kodak Series IV lens hood and a Kodak series IV to 27mm push on adapter ring with a Series IV daylight filter held in by a locking ring. The hood can be used instead of the locking ring to hold the filter. The film container cap fits the hood perfectly and can be used as a lens cap.
Third row is an Enteco Series V hood and has its own 27mm push on adapter ring and will accept any of the great variety of Series V filters. Below it is the Kodak Series V lens hood and last is the Kodak Series V to 27mm adapter ring with its locking collar and a daylight filter installed. The hood can be used instead of the locking ring.
Fourth row is a 42mm push on lens hood that fits the lens just inside the exterior in a groove probably made for this purpose. If this is used it allows setting the aperture by rotating the hood. Below it is a threaded Zeiss UV filter. This was a failed experiment as it did not thread on to the lens's 27 mm diameter. Below it is a KMZ M24x.05 threaded filter. This was also a failed experiment since it did not thread into the lens ID. What appear to be threads there don’t seem to be that size or may just be machined circles.
Next this is the Series V adapter ring and filter. As has been noted elsewhere this works but obscures the index mark for the aperture ring, requiring removal to correctly adjust the aperture. The Series V hood can be used here but makes the access even worse.
Last are pictures of the Series IV adapter ring with filter and also with the hood installed. The aperture index mark is visible in both cases. this seems to be the best solution, and the adapter ring and filter alone could be used with the 42mm push on filter, though the cute little Series IV hood is more in keeping with this minimalist lens.
Sorry for the poor quality of these photos.
I realize the 2.8/50 Tessar can apparently use a 25.5 screw in filter in addition to the 27mm push on, but it’s 3.5 brother cannot. I thought the 24mm screw in would work but no joy there.
The key to using Series IV filters is finding a 27mm Series IV push on adapter ring. I looked for quite a while before I found one. I have yet to use this setup with a roll of film, and I will be testing whether the smaller filter and hood cause any vignetting.
