Đánh giá lens nikon 24mmf2.8 năm 2024

Vignetting is very strong at f/2.8, that’s why the resolution test was a bit darker at this setting even in the center. At f/4 there’s still considerable vignetting, but it isn’t noticeable stopping down once more. With this lens I’d only worry about vignetting at f/2.8, but personally I rarely use that setting – only for closeups, and vignetting usually gives a nice touch.

Chromatic aberrations

For this test I shot a car from above on a bright sunny day early in the afternoon:

I am amazed at how great this lens is controlling CAs. Even at f/2.8 I could not see any traces of fringing whatever tests I did. It’s perfect.

Coma

Coma was tested using a LED source, at home in a dark room. I put the light source at the center (first column), corner and extreme corner of the frame (second and third columns, respectively), at maximum aperture and stopped down.

In this matter, the lens disappoints. That’s typical for old designs, and still is for the majority of wide angle lenses, and unfortunately this distortion is very noticeable in astrophotography. Forget it if you were considering this lens for that application and you’re a pixel-peeper. I’ve been using it for that purpose and I try to abstract myself from viewing the borders at 100%.

Flare

I shot a building in construction with the sun sneaking from a window, to see if I could see any flare traces. I started to shoot directly against the sun, then placed the sun at the corner and finally made some shots with the sun just outside the frame.

Shot directly against the sun.Shot with the sun placed at one corner of the frame.Shot with the sun just outside the frame.

The lens has a good resistance to flare and ghosting which keeps contrast intact. The problem is that if the sun is in the frame or in the proximity, the internal reflections of light will be easily visible in the pictures, as tiny as those reflections may be. It can be annoying; there were times I thought that the sun was already at a safe distance from the frame, and the lens still catched a small group of reflections. That can be easily solved in post-processing if those reflections are over a homogen background, but may be distracting and impossible to eliminate in textures. Just take a look at the last test image – these are the reflections I’m talking about (look at the second window hole at the left). In conclusion, it is necessary to frame at a safe distance from the sun, and I advise to get the optional HN-1 or use another device to block reflections definitely.

Bokeh

This is a wide focal lens with 7 straight blades, thus bokeh has to be the last thing you think about when buying this lens. I took a defocused picture at the widest aperture of the city lights and got crops of the center, corner and extreme corners. The test was repeated for the subsequent two stops.

The lens produces a fairly acceptable bokeh after all at f/2.8, although it has onion artifacts and accentuated edges. In real world shots they’re not very distracting, though. Stopping down soon reveals polygonal shapes as a result of a small number of aperture blades of straight type. That’s in line with every ordinary wide angle lenses. For good bokeh there are better choices such as the 24mm f/1.4 options (Samyang comes to mind).

Macro/Close-up

Although the lens is an old design, it has CRC which allows it to focus as close as 20 centimeters from the front element, resulting in a maximum magnification ratio of 1:8.8. It’s not bad, but I’ve seen much better from other wide angle lenses – the Voigländer Color-Skopar 20mm f/3.5 SL II Aspherical, which I also tested, is just one example, but it’s a modern design and a very different one. I shot an 1 Euro coin and this is what to expect at the minimum focus distance:

Summary

Build quality 10 All-metal and very professional, there’s nothing to complain about Handling 8 Fantastic manual focus lens with very rough focus ring, the only downside is having to select aperture on the lens in full stops Resolution 9 Superb resolution for a wide angle lens, only soft in the corners wide-open and a little at f/4 Distortion 5 Complex barrel and mustache distortion, not suitable for architecture Vignetting 8 Very strong wide-open, but not noticeable afterwards Chromatic aberrations 10 This lens reaches perfection here, as did the Voigtländer Coma 5 Poor, very noticeable in the borders in astrophotography Flare 8 Doesn’t suffer much and contrast is always on top, but easy to catch a few tiny reflections of light if you’re not careful Bokeh 4 Acceptable wide-open, but that’s about it Overall 74% A very sharp wide angle prime lens that is very small and very tough, still one of the best ever that money can buy

Samples

Here are some samples of pictures I made with this lens. Settings: native JPEG, picture control set to Landscape mode, no post-processing applied except reducing to 600 pixel width.