Bokehlecious Nikon lens

Started 10 months ago | Discussions thread
chambeshi Contributing Member • Posts: 919
Re: A few bokeh pointers

nuclearjock69 wrote:

85/1.4D. The "cream machine".


use google translate....

- In OPTIA, I analyzed the aberration of the lens that had good reputation in the past, can you mention some of the lenses that had good reputation?

Sato: We are measuring various kinds of lenses, so-called inscribed balls, including our company and other companies. For example, we tried comparing and evaluating "Ai AF Nikkor 85mm F1.4 D IF" (released in 1995) and "AF - S NIKKOR 85mm F1.4 G" (released in 2010) at OPTIA.

- That is interesting, what kind of characteristics were there in the aberration?

Sato: Sharpness etc. are better for the newest designed G lens, but it is not so if the D lens of one generation ago is not good, but the three-dimensional characteristics etc. are rather better for the D lens There was also a part thought. Although the residual aberration is generally smaller for the G lens, the D lens realizes well-balanced depiction by leaving aberrations well. You can understand such a situation by analyzing data obtained from OPTIA.

For the lens aberration measurement, we used a large optical instrument called the Ascania optical bench in the past. This optical instrument was able to measure spherical aberration, coma aberration, astigmatism, etc. for the first time by an experienced operator. However, now we are able to calculate all the aberrations immediately, simply by measuring the wavefront aberration with OPTIA, which is very efficient.

- Ai AF Nikkor 85mm F1.4 D It is said that the method of leaving the aberration of IF was good, but what kind of aberration did it concretely show?

Sato: For example, spherical aberration is left inflated in the minus direction, and some coma aberration is left, but even though it is thought based on MTF, even though it thinks on the shape base of a point image, there is no breakdown I am doing how to leave the aberration. Especially the three-dimensional MTF characteristic is excellent, the way of falling MTF of the part where the blur starts from the focused part, and the way the MTF of the part where the blur is started behind is similar very much, the front and rear blur It looks like Balance, but both are similar and looks well-balanced. Ai AF Nikkor 85mm F1.4 D There are quite a lot of users who think that blurring of IF is good, but the reason can be understood from the data.

- On the other hand, how is the current AF - S NIKKOR 85 mm F 1.4 G?

Sato: I am conscious of trying to clean out the back side blur, especially the current G type. We designed to make the blur more gradual behind the front side.

- D type when taking a composition such as to blur back and forth, and G type when giving priority to back blur?

Sato: It depends on your preference, but it does.

 chambeshi's gear list:chambeshi's gear list
Nikon Df Nikon D850 Nikon Z7 Nikon AF Nikkor 85mm f/1.4D Nikon PC-E Micro-Nikkor 85mm f/2.8D +12 more
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