#45/2.8 NIKON Ais-P 45MM vs GN Auto ニコン NIPPON KOGAKU 니콘 尼康 นิคอน | NIKKOR Vintage Lens | KEPAGEAR

Описание: 日本光学 東京 NIPPON KOGAKU TOKYO JAPAN 株式会社ニコン
NIKON Ai 45MM F2.8P vs GN Auto

A Standard Pancake Lens for the Nikon FM3A
AI Nikkor 45mm f/2.8P

The demand for this lens was for a high-performance lens with excellent performance from maximum aperture. It also had to be slim enough to be a good match for the compact FM3A, and it had to have a metal finish that made it look sophisticated. I was in charge of optical design. I was entrusted with this because I had also been in charge of the slim lens for the Pronea S that had been canceled.

Work on optical design began in early January of 2000. In order to make the lens as small as possible, and in homage to the GN Auto Nikkor 45mm f/2.8, a focal length of 45 mm was decided. I also thought that the 45 mm focal length, which offers a slightly broader angle of view than 50mm lenses, was more convenient and would make it easier for users to leave the lens on the FM3A for quick snapshots and the like. As with the GN Auto Nikkor 45mm f/2.8, we concentrated primarily on a four-element, three-group structure for the lens.

A four-element, three-group structure with one convex (positive) element at the front, one concave (negative) element at the center, and a concave-convex (negative-positive) doublet at the rear is known as a Tessar lens. However, Tessar lenses have two weaknesses. One is that they exhibit a great deal of spherical aberration, and the other is that the image plane is not as flat as it is with Gauss lenses.

As with Sonnar lenses, a Tessar lens may be considered an advanced version of the triplet. A concave-convex doublet forms the final convex element of the triplet. The refractive index of the concave element is lower than that of the convex element, which makes for a flatter image plane than is found with the triplet. As this doublet tends to exacerbate spherical aberration and coma, it is difficult to minimize spherical aberration. Further, in order to flatten the image plane, the radii of curvature for the imaging-side surface of the second concave element and the cemented surface of the doublet are increased. This makes astigmatism more likely to occur, resulting in another issue. As a result of this astigmatism, imaging tends to be poor in both frame mid ranges and at the extreme edges.
Details: https://imaging.nikon.com/imaging/inf...

Nikon 45mm f / 2.8 P (2001-2006)

이 45mm f / 2.8은 수동으로 만 초점을 맞 춥니 다.

모든 Nikon DSLR과 호환됩니다.

"P"는 완전한 자동화, EXIF ​​데이터 및 노출 제어를 위해 모든 디지털 및 자동 초점 Nikon에 연결하는 데 필요한 전자 장치가 있음을 의미합니다.

커플 링 할 수없는 유일한 카메라는 조리개 링이 너무 좁아 커플 링 프롱을 추가 할 수없는 pre- AI (1959-1977) 카메라입니다.

FA와 매트릭스 미터링을 사용합니다. D3, F3, F4, F6 및 내가 찾을 수있는 모든 카메라에서 훌륭하게 작동합니다.

이상하게도 조리개 스케일은 작은 ADR (Aperture Direct Readout) 스케일이며 대부분의 Nikkor 렌즈에서 두 스케일 중 더 작습니다. 따라서 FE, F2AS, FA 및 F4와 같은 카메라의 파인더 디스플레이는 대부분의 렌즈처럼 흰색에서 검은 색이 아니라 은색으로 표시됩니다.

이 최신 렌즈는 2001 년 2 월 PMA 전시회에서 소개되었습니다.
블랙 버전은 2001 년 9 월에 도입되었습니다.
Nikon은 여기에 표시된 바와 같이 약 25,000 개, 검은 색 12,000 개를 만들었습니다.

00:00 - Opening
00:20 - Details of Lens
01:39 - Panavision Test Chart
02:43 - Aperture Test & DOF
03:06 - Samples
04:18 - NIKON Ai 45MM F2.8 P vs GN AUTO
04:28 - Coating / Smallest Aperture and Position / Last Elements / Minimum Focusing Distance are difference.
06:06 - Nikon 45/2.8 HOOD HN-4 vs HN-35
07:48 - Closest Focusing Distance at 0.8 meter Ai-P vs GN Auto
08:33 - Nippon Kogaku Close-Up No.1 Vintage Filter for GN Auto
09:39 - Closest Focusing Distance 0.45 meter Ai-P vs GN Auto
10:15 - Subscribe / Like / Share

#Tessar #vintagelenses #Filmcamera #singlelensreflexcamera #filmphotography #streetphotography #streetsnap #NikkorZ #NikkorF #ニコン #nikkor #leicalens #leicaimages #leicacamera #KEPAGEAR #交換レンズ #マニアック #レンズ #カメラ #デジカメ #ライカ #Leica #นิคอน #니콘 #Pancakelens #NikonFM2 #NikonFM3

Background Music: only-for-you39-by-2sonmoa-9786