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Began selling lens Viltrox PFU RBMH 20mm f/1.8 ASPH with Nikon mount Z

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Larger stores began accepting orders for the lens Viltrox PFU RBMH 20mm f/1.8 ASPH for mirrorless cameras Nikon. Recall, this full-frame lens with manual focus, the Chinese company Chinese Shenzhen Jueying introduced in October last year, promising to release it in several versions, differing in mount.

Начались продажи объектива Viltrox PFU RBMH 20mm f/1.8 ASPH с креплением Nikon Z

Technical characteristics of the lens Viltrox PFU RBMH 20mm f/1.8 ASPH:

  • Focal length — 20 mm;
  • Angle field of view — 56,31°;
  • Aperture — f/1,8-f/16;
  • The optical design is 12 elements in 9 groups, including aspherical element and four element ED;
  • Number of diaphragm blades — 14;
  • Minimum focusing distance — 0.25 m;
  • Maximum magnification — 1:8,3;
  • Bore diameter of filter — 82 mm;
  • Diameter 76,8 mm
  • Length — 104 mm;
  • Weight 782 g

Lens costs $ 399. The kit includes the cover, two lens hood — petal and pie (the second allows you to set filters), and cover.

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Photography

Leica opens Silicon valley center for “computational imaging”

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CEO of Leica Harsh Mathias (Matthias Harsch) announced that Leica will create a “competence centre in computational imaging in California’s Silicon valley”.

Leica откроет в Кремниевой долине центр «вычислительной визуализации»

“After the transition from analog to digital photography in early 2000, 19 years later, we are faced with the second digital revolution in the industry of cameras and optics” — leads the source words Harsha.

According to the CEO of the company, is the industry legend, “computer visualization”, that is, the image acquisition indirectly by using algorithms that significantly affects the picture and in the future this influence will increase. Thus, creating a new research center, Leica provides a place in that future.

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Code: FREECALAFF. SHUTTERFLY OFFER: Offer expires December 31, 2017 (11:59 P.M. PT). Offer is good for one free 12-month wall calendar (8x11 size) through shutterfly.com or our mobile-friendly site. Valid only on your first purchase from Shutterfly. Promo can only be redeemed once per account and/or billing address.
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Photography

Became known, the Ricoh will celebrate the 100th anniversary of Pentax

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Some time ago, Ricoh has confirmed that this fall will release a new camera. It’s a little weird, as I was able to time the release to date and thus provide additional interest to the new product. The fact that on the 27th of November marks the 100th anniversary of the marches Pentax is now Ricoh.

Стало известно, чем Ricoh отметит 100-летие Pentax

However, no release of a commemorative products will not do. Though fans of the brand “new” is unlikely to please. According to the source, Ricoh will celebrate the 100th anniversary of Pentax release plugs into the hot Shoe O-HC171 with appropriate engraving.

Стало известно, чем Ricoh отметит 100-летие Pentax

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Photography

Camera Sony a7R IV also is “eating the stars”

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The source, before carrying out such a test of the camera Sony a7R III, reviewed the work of the camera Sony a7R IV terms of use of this device for astrophotometry. He came to the conclusion that the Sony a7R IV also is “eating the stars”. The reason would be the algorithm of noise reduction at high shutter speeds, which does not distinguish the stars from the noise.

Камера Sony a7R IV тоже «ест звезды»

The tests showed that the algorithm is activated when the shutter speed is equal to or exceeds the 3.2 s. This is clearly seen on charts: the first corresponds to a short exposure, which is long.

Камера Sony a7R IV тоже «ест звезды»
Камера Sony a7R IV тоже «ест звезды»

The horizontal axis is spatial frequency, related to the sampling frequency of the camera and on the vertical axis — the values of noise. In the absence of noise reduction graph tends to a horizontal line. Treatment is especially pronounced in the blue channel (the final chart). Presumably, this is due to the use of part of the pixels for phase focusing.

Камера Sony a7R IV тоже «ест звезды»

The source said that in the Sony a7R III noise reduction began to manifest itself upon exposure of 4 seconds.

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Code: FREECALAFF. SHUTTERFLY OFFER: Offer expires December 31, 2017 (11:59 P.M. PT). Offer is good for one free 12-month wall calendar (8x11 size) through shutterfly.com or our mobile-friendly site. Valid only on your first purchase from Shutterfly. Promo can only be redeemed once per account and/or billing address.
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