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Here is a shot with the Laowa 15 on Rollei Retro 80s.  

F11, 1/4s, Hoya 720 IR Filter. There is a little less vignetting on film and the performance is excellent. 

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Another image series with this lens in Visible light and IR.

M11, ISO 64, F11, 1/180s

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M11, ISO 64, F8, 24s, Kolari 720 IR Filter

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M11, ISO 64, F11, 1/4s

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M11, ISO 64, F2, 90s

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M11, ISO 800, F2.4, 15s. These are my standard Astrophotography settings for a 15mm lens. I was able to close the lens down half a stop to optimize the coma performance and there was still plenty of light transmission to create a nice image. 

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  • 2 months later...

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I had access to a Zeiss ZM 15 and shot a quick side by side on the M11. The Zeiss did not have a center filter, so the vignetting was off the charts. Center filters are a pain in the neck, so I really wanted to see how it would perform with no filter. I adjusted for it a bit, but there was too much vignetting to correct. Bottom line, the Laowa is a better corrected lens. With both lenses at f2.8, the stars are a touch cleaner on the Zeiss at 100%. Coma is still present, but it is better than the Laowa. However, the Laowa is dramatically sharper across the field and when you view the entire frame, the Laowa delivers a better image, partly due to the much reduced vignetting. The Zeiss also gets really soft in the corners.

Overall, I wouldn't trade my copy of the Laowa for the Zeiss. It's clear that the Laowa can produce better overall images. Plus it is one stop faster and has less vignetting at F2 than the Zeiss does at F4. 

 

Here is the Laowa at F2.8

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Here is the Zeiss at F2.8

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