The 20mm lens is a tough one to make. All the major manufacturers share one in their lens line-up (although Canon’s EF lens is a bit different), but they don’t get the love of them like 24mm or ultra-widescreen . They’re an uncomfortable spot, not wide enough for true wide -angle lovers, close to 24mm for everyone with a standard zoom (although fans of the 35mm prime will definitely consider it).
Important details
first: Sony FE
Length: 84.7mm (3.3 inches)
Sad: 373 g (13.2 oz)
Exit areas: 9
Minimum distance: 18cm (0.59ft)
corner of view: 94 degrees
In practice, 20mm is much larger than 24mm – each mm is calculated at this end of the length – and Sony’s E -mount 20mm G lens, with its f / 1.8 aperture, will setting the best niche for the film. While it can’t compete with the 14mm f / 1.8 from Sony or Sigma for wide range, it’s better and has less weight in your bag. While Sigma’s 20mm Art lens, which has an f / 1.4 aperture, has a much larger optic with a bulbous front to avoid the use of traditional filters.
If you want to check out some other lenses check out our guide to the best lenses for astrophotophoto, and if you are in the market for a camera body check out our best cameras for astrophotographie and our best cameras for photography and video. in charge.
Sony 20mm f / 1.8 G lens: Resolution
- Small and light
- apo form
- First floor is flat
While it can be seen at times that some lens manufacturers – especially Sigma – don’t have the message that lenses are smaller and lighter than their peers. DSLR, Sony’s 20mm G lens is limited to size and weight. One of these is the f / 1.8 aperture, which cuts two -thirds of the aperture on an f / 1.4 lens which leads to better weight management while staying faster than the f / 2.8 competition. Tamron’s 20mm and Samyang’s lighter 18mm. . Its 67mm filter cord is also standard.
Like all G lenses, the 20mm is made of plastic with a metal mount. It features a precision wrist strap, an exit ring with an Auto position but no lock, a switch for pressing the ring, an AF / MF switch, and a programmable fixed lock button. The petal -shaped lens is a very fine plastic – and much better in quality than the metal frame that came with 24mm f / 2.8 G – while the lens cap is a bit of a design normal-pinch normal.
The plastic body is designed with a small shape to help it protect the fingers and maintain its shine. The precise bracelet is not thicker than the one we have seen but it is easier to grasp with the use of the thumb and forefinger. In our case, the ring may be slightly open, but it is not difficult for us to achieve a good view of the stars using the rear panel of the camera and its precise zoom.
Leni Sony 20mm f / 1.8 G: Hana
- Fast aperture
- The coma is not bad at all
- Nor is vignetting
All high -speed wide -angle lenses have a problem called ‘coma’ when used for motion picture, which sees different stars spread out as they approach the sides and corners of the screen. to draw. The easiest way to avoid this is to cut something like f / 2.8, but if you buy an f / 1.8 lens to use it at f / 1.8, it’s not that easy to do. recorded in the program, so the angel wings are standing. the sides of the star become a common sight.
The Sony 20mm has a slight distortion coma, even in the farthest corners, but it’s not reported. Vignetting is well -designed, although the lens side is built in to quickly open JPEG images, which shooters may not be aware of, as Adobe Lightroom uses the side lens when taking shots. face painting in his book. Thus for chromatic aberration.
Because of its light weight, the lens is ideal for mounting on a star, and often has a weight limit. The movement of the stars can affect their sharpness in the image, and the most common way to create a high -resolution display to reduce this is to divide 500 by your exact length. and in the case of a 20mm lens up to 25 seconds. The 25 -second display at f / 1.8 puts in a lot of light, so you’ll have to wait until it’s really dark to use this – short displays can darken the sky to a deep blue and the care of the points of the stars.
Leni Sony 20mm f / 1.8 G: Hana pono
- Very good
- Careful observation
- The door ring is not locked
We thank Sony for returning the aperture ring to some of its lenses instead of relying on the setting through the camera body, but without the lock, it can release the f / 22 from Auto position, even if you have large fingers. correct the difference between the body and the lens. This is a small size, not independent of the 20mm lens.
Better image and snappy autofocus, with better spreads on the sides and corners and a wider width, while hand -held cameras will enjoy the depth of field the lens can handle. up to f / 1.8. Place the subject close to the frame and release the back, however, until there is a lot of blur. The low focal length, not marked on the lens, is about 18cm, so it can be very close.
Should you buy a Sony 20mm f / 1.8 G lens?
Sony’s 20mm prime is both faster and faster but drives its size and weight down compared to wide -angle lenses with the same aperture, as well as high -speed lenses of the same length. It can be allowed to get wider, become more standing down, and the distortion coma, while sitting, doesn’t change much the images of the night sky, much more if it doesn’t. You’ll be close.
If this product is not for you
Lenses faster than 24mm are a competitive area for the E-mount. Sony and Sigma make large and heavy 14mm f / 1.8 optics, while Samyang makes a 14mm f / 2.8 (both manual and other autofocus modes) and has a lot of f / 2.8 zooms now. , or 12mm. Samyang is 18mm f / 2.8 (opens on new page) It’s the smallest and lightest that any ultrawide AF prime has (Sony has a Zeiss brand lens in this segment, but three times the price), while Samyang’s 12mm f / 2 (opens on new page) and Sigma’s 16mm f / 1.4 (opens on new page) they are APS-C lenses, so the range is not the same as the sound when mounted on standard cameras.
Sigma incorporates two 20mm E-mount lenses, the f / 1.4 Art which is larger and heavier than the Sony, while producing impeccable images, as well as the F / 2 contemporary, crossover. the beautifully designed Series of small metal lenses. Tamron uses a 20mm f / 2.8 stand -out to improve his close -up focus – probably not necessary for astro performance. The highest aperture of / 2.8 is the maximum aperture for astrophotography – much faster imaging if you don’t use a tracker.
Laowa makes the 12mm f / 2.8 and 15mm f / 2 lenses on the E-mount that are popular with digital photographers, as autofocus isn’t as important when looking at the stars.
