Hi, A person is selling some manual lenses. The price is atractive! Among the lenses I tried, there were a 35mm., a 50mm., and a 75mm. All of them from the manufacturer Carl Zeiss. The lens that attracted me the most was the 35mm. On my Nikon D50 is a 52mm, (on a Canon EOS dSLR it is a 55mm). Two things seemed a bit strange to me after doing a few shots with the 35 mm. lens, (but I have not shot with a normal lens in a while, so perhaps that is not that strange). One is, that I took a horizontal shot of a girl's face within two meters of focus range, and her face looks a little bit "expanded" or "too wide" for me. If it is allowed, I would gladly post the photos. (Perhaps my eyes don't usually notice a face that is a bit wider of what it seems to me. I also took a much closer vertical shot and her face looked a bit the same. This about a meter away from me). The other thing, while cool, I don't know if it may have a disadvantage. Being a lens with a 35mm. focal legth, a wide angle in full format the focusing distances for this lens are: 0,24m., 1meter, 2meters, and then infinitum. with a regular or standard 50 mm. lens one has: 0,45m, 0,8m., 1meter, 2meter, 3meter, 4meter, 5meter, and then it goes to infinitum. So your subjects can still be a couple meters farther away and one has the chance to "discriminate'?'" or tune a bit more the focusing distance. With the 35mm. lens one only has two meters and then infinitum! I would use this lens for two purposes: One, with the video capability of a dSLR, I would record the interviews of the people sitting (in front of me). (I am a sociologist). They would be no further away than 2 meters away from the camera. I just wouldn't like them to have a "tomato-sized" face due to the possible "wide angle effect" of this lens. The other use would be as a street documentary lens for photography. Some examples of interviews I found on youtube are the following, (I didn't even watch them completely, it is just to show how people sit while interviewed): 1. http://www.youtube.com/watch?v=P9W_hI328FQ&feature=channel 2. http://www.youtube.com/watch?v=mYjIsWNJGtw 3. This other viedo is a bad video done with that lens on a 5ooD camera: http://www.youtube.com/watch?v=Q--6NQ9p6Ek What does the crop factor do, (either 1,5x, or 1,6x), with your image on a wide angle lens like the 35mm.?? Is it a "cut out" from what an image in full format would be, or the crop factor does have an influence on the image ?? Would a 50 mm. lens on full format have less "wide angle distorsion" than this "52 mm." on my Nikon ?? With regard to focus with this lens. Suppose you have two people 4 meters away from you, and then a wall 7 meters away from you. What can you expect about sharpness, (being both, the two people and the wall), focused to infinity?? Will both be sharp or ..... mmmhh ?? Thank you in advance, kind regards, igmolinav.