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Wiederverwendung von Zeiss T* Contax 645 Objektiven mit der ALPA: Einige Tests, Abbildungen und Fakten...
Sometimes people cannot believe that exceptional lenses on the right camera are still exceptional after 16 years and more. Today's test with our Carl Zeiss T* Distagon 3.5/35 for Contax 645 on our ALPA 12 FPS with the new ALPA lens module for Contax 645 lenses together with a Phase One IQ180 digital back. Our cameras are built to last and help good stuff to survive.
Please find here some sample shots as an overview and full-resolution images, plus illustrations of movements in the context of what is achievable with those lenses. We captured all the test images with a Phase One IQ180 digital back (80 MP resolution, pixel pitch 5.2 microns).
CAUTION: Due to gusty wind there might be some blurry trees and bushes.
Taken with the IQ180 and 5 mm of a rising front (upwards shift). The gusty wind and daytime made us capturing this at f8 and 1/4 sec @ ISO 35. This image shows a plain photograph and distance set to infinity. The 5 mm rise equals an image circle of 72 mm and, therefore, in the upper edges beyond the official image circle. BTW: Yes, the sky was somewhat purplish that evening ;)
Taken with the IQ180 and 5 mm of a rising front (upwards shift). The gusty wind and daytime made us capturing this at f11 and 1/2 sec @ ISO 35. The full resolution portion shows the University of Zurich at a distance of approximately 1.5 kilometers. Again, the result proves the low vibration of the ALPA 12 FPS and a small pixel digital back. Also, the all-new IQ3 100 MP has similar-sized pixels of 4.6 microns. Therefore no big issue for the FPS when used correctly and with a sturdy tripod.
What do you see when using the entire movement of 12 mm (in this case, rise)? An illustration for understanding the real-life image circles of the Contax 645 lenses (70 mm) and what you can see. These are illustration graphs only..
Die Carl Zeiss T*-Objektive für die Contax 645 sind auch nach vielen Jahren noch eine interessante Brennweitenergänzung für die ALPA. Das Makro-Planar 4,0/120 mm ist nach wie vor ein hervorragendes Objektiv für Nahaufnahmen. Für Porträts bietet das Sonnar 2,8/140 mm die oft gesuchte reduzierte Schärfentiefe, und das 210 Sonnar und das 350 mm Tele-Tessar bieten Zeiss-Qualität auch für das digitale Mittelformat.
Die Bildkreise betragen mindestens 70 mm und decken 33x44 mm und 40x54 mm Sensoren vollständig ab. Vor allem die längeren Brennweiten erlauben zum Teil erhebliche Verstellwege. Die ALPA 12 FPS und Silex Mk II (zusammen mit ELA) steuern die elektromechanische Blende und den Fokusmotor über das ALPA Objektiv Modul Contax 645.
