Can we continue to evaluate the legendary Longteng new SP90 macro lens?

Is IT 168 evaluating SP90? A name representing parity and high quality has been a golden signboard that Longteng is proud of for many years. Now, Longteng has released its latest upgraded version SP90 MMF/2.8 Di Macro 1: 1 VC USD, which dominates the macro lens of VC anti-shake and USD ultrasonic motor. It remains to be seen whether we can inherit the old Sp90 from the previous generation.

Let's take a look at the appearance of this lens first. Like the general macro fixed-focus lens, it belongs to the slender type, and the straight barrel hood is straighter. The wide focus ring and moderate diameter make this full-time manual focus lens more handy in use, which is slightly inferior to the tall and powerful Canon EOS 5D Mark III used in the test, but there is no sense of disobedience. I think the workmanship is very new? As a flagship product, SP90 is even better than the 2.8 VC of the new 70-200.

▲ SP 90 MMF/2.8 Di macro 1: 1 VCUSD prefix

▲ With Canon EOS 5D Mark III

In terms of workmanship, in addition to the manual autofocus switch, anti-shake switch and focus window, there are three points to pay attention to: First, the dustproof and drip-proof design will undoubtedly provide more suitable occasions for this lens, making it more outdoor. Performance space; Secondly, the metal bayonet design can provide a longer life for this non-suspended special lens; The third is a special focus selector switch with three gears, namely 0.3m-0.5m and 0.5m-? And complete files. This design is bound to make this macro lens have a faster and more accurate focusing speed, avoiding? Pull the bellows? The appearance of the situation gives the user a better focusing experience.

▲ Dust-proof and drip-proof metal bayonet design

▲ Anti-shake, autofocus and focus selection switch

As a rising star, Longteng SP 90 MMF/2.8 Di Macro 1: 1 VCUSD adopts two XLD (ultra-low dispersion) lenses and 1 LD low dispersion lenses, which can completely correct all kinds of chromatic aberration. EBAND (Ultra Wideband Anti-reflection) is used for lens coating, which can effectively reduce glare and ghost effect and improve image quality. At the same time, as a macro lens, the maximum shooting magnification of the new SP90 is 1: 1 (equal times), and the photographed object can be presented on an imaging element with the same size as the real object, thus achieving equal times shooting. This is undoubtedly a boon for photographers who like still life sketch.

Comparative evaluation of anti-shake function of Longteng new SP90F2.8VC

What is the biggest highlight of this upgraded SP90? USD ultrasonic motor, full-time manual focusing and the highest 4-speed VC optical anti-shake technology undoubtedly provide great convenience for indoor hand-held macro close-up shooting. After a period of use, the biggest impression of this lens is that the focus of USD ultrasonic motor is fast and accurate, even better than the new 70-200 F2.8 USD VC, which is a cool word in the focusing experience of full-time manual focusing. In VC anti-shake, the effect is also good. According to the author's indoor test, the effect can be seen.

▲ The local enlarged area of the real shot sample of the anti-shake test is shown in the red box above.

Under the same exposure conditions, the contrast test of hand-held shooting without anti-shake (left) and with anti-shake (right) is shown in the following figure:

▲ Comparison diagram of unactivated anti-shake (left) and activated anti-shake (right)

From the above picture, we can clearly see that Longteng's VC anti-shake is very helpful for hand-held shooting on this macro lens which mainly shoots indoor still life. Even if there is insufficient light in the indoor environment, there is no need to sacrifice the image quality to improve the sensitivity, which ensures the film-forming ability of the lens.

Contrast Test of Resolution of Center Edge of New SP90 Lens

In order to have a deeper understanding of the resolution of the lens, we take screenshots of the center and edge respectively, so as to have a more intuitive understanding of the image quality. The cut area of the photo is shown in the red box below.

▲ Schematic diagram of cutting area

Resolution performance of lens with different apertures;

It can be seen that from F4.0 to F 16, the definition of this lens is still very good. Because the depth of field obtained by the macro lens is very shallow, in order to fully and clearly show a small object, when we use the macro lens, we usually intentionally receive an aperture of around F8.0, which coincides with the optimal resolution of this lens, so the resolution that is not too high when the maximum aperture is F2.8 will not affect normal use.

Contrast Test and Summary of Distortion Dark Angle of New SP90 Lens

Dark corner, as an objective defect of losing light at the edge of a photo, is also the joy of some people and the worry of some people, and it is the first choice of many documentary photographers and journalists. As a macro close-up, how does this lens control the dark angle? Let's find out.

▲ left F2.8 right F4.0

▲ left F5.6 right F8.0

▲ left F 1 1 right F 16

▲ Left F22 Right F32

It can be seen that with the narrowing of the aperture, dark corners can be basically avoided when receiving F8.0. If consumers are very concerned about dark corners, they can appropriately narrow the aperture to shoot.

In addition, lens distortion, as an inevitable problem of zoom lens, seems to be no problem in this finely crafted fixed-focus lens, and the test results are not surprisingly satisfactory.

▲ Excellent distortion control

Evaluation summary:

As a continuation of its own classic products, Longteng naturally has to work hard on this shot. Judging from the experience, this lens gives the author three words: stability, accuracy and sharpness. . Anti-shake function has stable imaging; Focus quickly and accurately; The image is still clear. As a lens suitable for macro sketch and portrait, compared with the old SP90, the upgraded version has undoubtedly brought us a wider scope of application and a better user experience, which also doomed the new SP90 to continue the classic and become an indispensable lens in the photographer's camera bag. As it is a sub-factory lens, it is recommended that Canon and Nikon users, except Sony users (who bring their own anti-shake body, can choose the old one without anti-shake version), buy it at a reasonable price after listing for a period of time according to their own needs.