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EXCERPT page containing first few paragraphs. 2020-05-29 06:43:34

45-megapixel Nikon D850
Zeiss Milvus 25mm f/1.4

Flare for Milvus 25/1.4

As an f/1.4 design with 15 elements, flare control is generally excellent. However, there are some weak points to the performance, as will be seen on this page.

Rule of thumb: always shield the front lens element from non-image forming light. The lens shade is frequently incapable of doing the job fully, excepting specialized cine-style rectangular accordion shades.

Backlit glacial erratics, fall color, sunstar

When non-image-forming light strikes the front element, particularly the entire front element, few if any lenses can resist entirely—even Zeiss Otus lenses will show a loss of contrast.

I tried many times to shield the front lens element from the sun, but the sun was just above the edge of the frame so that I kept sticking my hand or hat into one corner of the frame. I finally succeeded by detaching the lens hood and manually holding it in place, extending it forward one centimeter or so more than when locked in place.

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Variants f1_4_shaded,f6_3_unshaded, f6_3_shaded available in full article
f6.3 @ 1/160 sec, ISO 31; 2017-10-23 14:57:46
NIKON D850 + Zeiss Milvus 25mm f/1.4

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