 Posted: Sat Apr 21, 2018 9:35 pm Post subject: |
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Wadidiz wrote:
I snagged me a Schneider Robot-Xenon 40mm/1.9. I think I may have found the best performing lens for my Sony A7 so far. I glued it (non-destructive) to an LM-to-E-mount focusing helicoid. Now focuses down to less than 0.3m. This lens (as folks here know) has--count 'em--15 aperture blades! Very smooth focus, solid aperture clicks and very well-built. I'm finding that 40-40mm is a great focal length for normal focal length 24x36mm photography. Focusing is not as critical and it's more forgiving, yet not distorted like a wider-angle lens. Still good for portraits. I'm wondering if lenses that have a closer flange distance to the film/sensor have a definite advantage? I did some sharpness tests on tripod against several lenses, including a Canon FDn 85mm/1.2 L (I know. Wrong focal length.), a Canon FDn 50mm/1.4 and a Rodenstock Heligon 50mm/1.9 (actually 47mm). The Xenon was at least as sharp although magnified compared to the others. I'm looking forward to finding out if it has similar 3D pop compared to my Summicron-R 50mm. |
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