Reviews
Premium optical performance, slim design with difficult handling.
I tested the K&F Concept Nano-X PRO series polarizing filter 67mm with the Sony A7RII on a Sony SEL-20F18G. I use polarizing filters 99% of the time in landscape photography. Since the effect can practically not be recreated in post-processing, a polarizing filter is one of the only material filters that I use regularly, along with neutral density filters.
The K&F is one of the slim filters. This can prevent vignetting in the extreme wide angle, but makes handling much more difficult due to the narrow version. Due to the design, this is the case with almost all manufacturers. After all, the filter has a threaded socket at the front, so that several filters can be screwed on one after the other. Lens hood and lens cap can also be attached depending on the type. The filter comes in a high-quality, sturdy bag with a magnetic closure. As a small gimmick, the manufacturer also includes a microfiber cloth for cleaning.
The thread can be unscrewed cleanly. The rotary version runs cleanly and smoothly. Due to the slim design, handling is sometimes very difficult. On the one hand you have to be careful not to screw the filter too tightly onto the lens, otherwise it will be difficult to loosen it by hand. On the other hand, turning the filter counterclockwise runs the risk of unintentionally loosening the filter if it is not screwed on tightly enough. Operation is also no longer possible with the lens hood attached.
The glasses come from the Japanese house Asahi Glass and appear to be highly coated. I couldn't detect any loss of sharpness, even at extreme magnification. I could detect a minimal color deviation into the reddish. But this is really hardly noticeable. Since the lens I used is not prone to lens flares, I was glad that the filter didn't deteriorate. The filter absorbs almost exactly one f-stop of light, which is a very good value. The filter effect is good, but I honestly didn't expect anything else in this price range.
On my attached pictures you can see the result in strong backlight, with and without a filter. I couldn't find any quality differences or lens flares here. The filter effect can be seen clearly on the leaves on the other two images. Here the sunlight falls on the bushes at an angle of about 90 degrees. The polarization effect is clear. The white balance was consistently set to daylight for all shots. Here you can hardly see the very slight color shift.
Until now, I hadn't had the K&F Concept on my radar in this price range. The results of the filter are top notch and do not detract from the quality of my high quality lenses. Unfortunately, you have to live with the somewhat difficult handling with this design, K&F is not reinventing the wheel here either. For the optical performance, however, I award the full five stars.
The K&F is one of the slim filters. This can prevent vignetting in the extreme wide angle, but makes handling much more difficult due to the narrow version. Due to the design, this is the case with almost all manufacturers. After all, the filter has a threaded socket at the front, so that several filters can be screwed on one after the other. Lens hood and lens cap can also be attached depending on the type. The filter comes in a high-quality, sturdy bag with a magnetic closure. As a small gimmick, the manufacturer also includes a microfiber cloth for cleaning.
The thread can be unscrewed cleanly. The rotary version runs cleanly and smoothly. Due to the slim design, handling is sometimes very difficult. On the one hand you have to be careful not to screw the filter too tightly onto the lens, otherwise it will be difficult to loosen it by hand. On the other hand, turning the filter counterclockwise runs the risk of unintentionally loosening the filter if it is not screwed on tightly enough. Operation is also no longer possible with the lens hood attached.
The glasses come from the Japanese house Asahi Glass and appear to be highly coated. I couldn't detect any loss of sharpness, even at extreme magnification. I could detect a minimal color deviation into the reddish. But this is really hardly noticeable. Since the lens I used is not prone to lens flares, I was glad that the filter didn't deteriorate. The filter absorbs almost exactly one f-stop of light, which is a very good value. The filter effect is good, but I honestly didn't expect anything else in this price range.
On my attached pictures you can see the result in strong backlight, with and without a filter. I couldn't find any quality differences or lens flares here. The filter effect can be seen clearly on the leaves on the other two images. Here the sunlight falls on the bushes at an angle of about 90 degrees. The polarization effect is clear. The white balance was consistently set to daylight for all shots. Here you can hardly see the very slight color shift.
Until now, I hadn't had the K&F Concept on my radar in this price range. The results of the filter are top notch and do not detract from the quality of my high quality lenses. Unfortunately, you have to live with the somewhat difficult handling with this design, K&F is not reinventing the wheel here either. For the optical performance, however, I award the full five stars.
27/02/2023