Zeiss projector definition9/7/2023 ![]() I think that when using this lens, the whole point is not in sharpness or in bokeh as such, but in the fact that the picture from it (as well as from many old Zeiss or Lake lenses) turns out to be somehow atmospheric, and just the technical shortcomings of Zeiss manufacturers specially used to get just such vivid and atmospheric pictures. Actually, the death of a working laptop and, as a result, work on an old laptop with Intel Centrino 1.2GHz and 2 GB of RAM helped me a lot to limit photo processing :). Most photos were taken with camera autoBB, developer settings, Contrast +1, Saturation +1. The CZJ Tessar 80 / 2.8 pleased me with its picture: when developing from RAW to Canon DPP, I practically didn't have to make any changes. But in many respects due to the lack of enlightenment, the lens does not distort color. They influence even mine Canon 600D with a small APS-C sensor, especially on an open aperture.Ĭhromatic distortions, on the contrary, are almost invisible - they are masked by spherical aberration.ĭespite the lack of an antireflection coating on the lenses, the lens has a good contrast, however, attempts to take something in the backlight will get bogged down in the white veil of interlens reflections. This Tessar also has field aberrations: this is both coma and astigmatism. The examples also show an increase in contrast when aperture, as well as the effect of the rainbow when working in backlight. This difference, which we observe at a qualitative level, is quantified by the graph of the frequency response of the lens (MTF). The same Industar-29, on the contrary, is prone to greatly erode details, which is very bad. For example, in a portrait in the shade you can see the details of the face and the texture of the skin, but in bright light the features will be blurry, fuzzy - as if misted. The CZJ Tessar 80 \ 2.8 is characterized by low contour sharpness (and the associated poor performance in bright light) with a fairly good elaboration of details. Also, this old German tessar of the 1930s is much better than the Soviet parody represented by Industar-29 - the specific profile of the spherical aberration of the latter does not leave any chance to consider the details in the picture. Having experience using several more of these lenses, I can note the proximity of this Tessar to the projection Triplet 78 \ 2.8 in sharpness. Because of this, by the way, the lens is difficult to use with cameras like my Canon600D with inferior JVI - the focus point into it can be seen very badly, confirmation of focusing on the chip works extremely unsatisfactorily. ![]() This is a sign of under-corrected spherical aberration. View of the lens to the lumen with a covered aperture.Īlthough the 29-blade diaphragm of Industar-XNUMX has a slightly strange shape, in the end it also has a lens, which is not entirely correct - it is still close to the optical center of the lens and works no worse than the “correct” aperture.īeing an old high-speed tessar, the lens forms a soft image with a pronounced effect of glowing contours and circles in bokeh with a bright edging. ![]()
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