http://blog.hisway306.jp/entry/2018/05/15/080000#K-1-Mark-II-vs-K-1-%E3%82%AC%E3%83%81%E3%83%B3%E3%82%B3%E5%AF%BE%E6%B1%BA
(in Japanese)
IMO, the images from the Mark II have dull colours as what DPR suggested. However, the resolution difference is not as huge, ditto for the noise difference.
Wednesday, May 16, 2018
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Padmakar Srivastava · 357 weeks ago
1.f/1.2:Should be designed for f/1.4, but the diameter should be increased for f/1.2. It will loose some resolution and sharpness at f/1.2, but would have a better bokeh. These characteristics would be very desirable for a portrait lens.
2.If desired, can be designed as a narrow zoom lens like 85mm – 100mm, but it may add to the cost.
3.Should also be designed for close focusing, but the users should be advised that for sharp pictures an aperture of f/2.8 or narrower should be used. Of course, for the optimum results users can always use the middle apertures like f/8.
4.Should be capable of soft focus effects. This effect should be done by using a ring, independent of aperture. Several decades ago I bought a 135mm, f2.8 used JC Penny lens in Pentax K mount in Philadelphia in 10 or 15 Dollars. I also bought a jewelers screw driver set. I took the lens apart and began playing with changing the distance of lens elements. The best effect I got by removing the spacer between the last (closer to the film) two rear lens elements. The mistake which I did was to file down the auto aperture lever and I don’t remember the reason now. Therefore, I was able to shoot butifull pictures at full aperture, but I had to stop down the aperture manually for smaller apertures. However, at full aperture the portraits were fantastic with a dreamy look, which is impossible to have with diffusion filters, because the diffusion filters superimpose the diffusion uniformly on the picture as opposed to soft focus lens. In a soft focus lens the highlights tend to merge in the shadows, which gives that dreamy effect.
5.This lens would serve as:
a.Portrait lens
b.Soft focus lens
c.Macro lens
d.May be a zoom lens, if so designed.
Chris · 356 weeks ago
Also, although you are right that extending the focusing range while advising a smaller aperture at close distances would add to the versatility of the lens, ALL reviewers frown when they see a modern lens that is not ultra-sharp at its maximum aperture and throughout the full distance range.
And soft focus is out. Rightfully so. Can be done in software.
Padmakar Srivastava · 356 weeks ago
Chris · 356 weeks ago
JohnCarlin · 352 weeks ago