Meyer-Optik Trioplan 50mm f2.9 & Sony A7
This lens came from a Beltica folder camera that I bought from the Trunk Sale organized by the Photographic Historical Society of Canada (PHSC) last Sunday. The camera (lens, actually, since all the shutter/timing etc are in the lens, not the camera) still works perfectly, but I took it out (but is easy to put back in if needed) and adapted it with an M42 mount. The lens has its own focus mechanism which is good from about 3 feet (1 meter) to infinity. I am not a big fan of very long minimum focus distance, such as this one, so I put the lens on a Pentax focus helicoid and uses the helicoid to focus instead. If I really want macro level close focus, I could use both the focus on lens and the helicoid, but I found that the lens' bokeh is destroyed/masked when focuses too close; all you will see is very shallow depth of field with pretty much uniformly blurred background, which to me, is boring.
Meyer-Optik Trioplan 50mm f2.9 & Sony A7
The lens is coated and looks quite nice, but still very susceptible to flare, even with a hood in place. Care should be taken when shooting against the light.
As expected, the Trioplan 50mm f2.9 produces very similar rendering as other Triplets, but each has its own unique traits. For comparison, I used the Balda-Werk Rigonar 50mm f3.5 quite a bit, which is also a triplet. I much prefer the Trioplan. Perhaps the extra 1/3 stop of light makes a bit of a difference, but I find the Trioplan much more pleasing with less harshness in the out of focus area.
Like most Triplet lenses I have used, the corners of most of them are not very good, even when stopped way down. So this is not really a landscape kind of lens. The center of the lens, however, is quite sharp.
I quite like shooting with this lens, especially when mounted on the butterly smooth Pentax focus helicoid. I like the rendering of the lens, but most importantly, I didn't have to pay the exorbitant price for one.
