Nikkor Af

leadpic_AFS_DX_18_105In summary

A well-build general-purpose lens with above-average performance for Nikon’s DX-format cameras.Designed for use with Nikon’s DX-format cameras, the new AF-S DX Nikkor 18-105mm f/3.5-5.6G ED VR lens will be offered in some Nikon DSLR kits – including with the new D90, which was used for our tests. Covering angles of view equivalent to 27mm khổng lồ 157.5milimet, it represents a good general-purpose lens for everyday photography và is priced accordingly. Nikon’s internal focusing system enables the lens lớn be used with angle-critical filters, such as polarisers, while a Silent Wave sầu Motor focus drive ensures autofocusing is fast & quiet. . .

Full review
leadpic_AFS_DX_18_105

Designed for use with Nikon’s DX-format cameras, the new AF-S DX Nikkor 18-105mm f/3.5-5.6G ED VR lens will be offered in some Nikon DSLR kits – including with the new D90, which was used for our tests. Covering angles of view equivalent khổng lồ 27mm khổng lồ 157.5mm, it represents a good general-purpose lens for everyday photography và is priced accordingly. Nikon’s internal focusing system enables the lens to lớn be used with angle-critical filters, such as polarisers, while a Silent Wave sầu Motor focus drive ensures autofocusing is fast và quiet.Constructed in Nikon’s Vương Quốc Của Những Nụ cười factory, this lens consists of 15 elements in 11 groups, with one ED (Extra-low Dispersion) glass element plus an aspherical element to lớn minimise the chance of various lens aberrations. Nikon’s Super Integrated Coating (SIC) has been used to lớn minimise internal reflections, thereby reducing the chance of flare & ghosting. Built-in voice coil motors are used for lens-shift image stabilisation, which claims to offer approximately three f-stops of shutter tốc độ advantage over a non-stabilised lens. Only one stabilisation mode is provided. The DX design indicates it is unsuitable for cameras with ‘full frame’ sensors – and also for film SLRs.The G-type designation indicates this lens is designed for exclusive sầu use with Nikon SLR models where the lens aperture is controlled from the camera body toàn thân. It allows more accurate metering when used on the lachạy thử cameras with 3D colour matrix metering but won’t tư vấn the auto aperture controls và wide-aperture metering on older cameras without the required electronic connections. In line with its affordable price tag, most of this lens is made of plastic, with the barrel textured khổng lồ match the plastic bodies of the Nikon cameras it’s designed for. High-chất lượng industrial polycarbonate has been used for both barrel & mounting plate – và also the filter thread. Internal focusing ensures the front element retains a fixed orientation, regardless of the focal length setting. The zoom ring is positioned towards the front of the lens barrel and is approximately 45mm thichồng. Just under 30mm of this is a rubberised grip with ridges for losingravidos.comfort & security. Six focal length settings are engraved at the camera kết thúc of the focusing ring, covering 18, 24, 35, 50, 70 và 105milimet settings.Behind the zoom ring is a narrow (8milimet wide) focusing ring, which also has a ridged rubber coating. No distance scale is provided; nor is there a depth-of-field scale of infrared focus index. On the side of the lens are two sliders, the top one switching between auto and manual focusing and the lower one turning the VR (vibration reduction) stabilisation on & off. The lens is supplied with a petal-shaped lens hood (HB-32), end caps and a soft carrying pouch (CL-1018).

HandlingThe Đánh Giá lens fitted easily – and snugly – onkhổng lồ the D90 toàn thân, where it was well balanced & a very natural fit with the camera. The Silent Wave sầu Motor drive was fast & very quiet. A soft beep is audible when focus is achieved và the selected AF points are outlined in red with losingravidos.compatible cameras.Both the zoom and focusing rings moved smoothly và positively & the lens showed no sign of extending when the camera was carried with the lens pointing downwards. (No zoom loông chồng is provided.) Moving from the 18mm to lớn the 105mm focal length requires a quarter of a turn và lengthens the lens barrel by 45mm. Setting intermediate focal lengths accurately was easy as the engraved marking on the lens barrel perfectly matched the focal length settings.The focusing ring moves through 360 degrees when the slider is set khổng lồ A and about a third of a turn with the M setting. It feels a little slacker than the zoom ring but the degree of focusing precision provided should be adequate for most users.

PerformanceImatest showed the AF-S DX Nikkor 18-105mm f/3.5-5.6G ED VR lens lớn be a good partner for the D90 & a losingravidos.competent although not stellar – performer. Highest resolutions were recorded a couple of stops down from maximum aperture and resolution declined steeply from f/đôi mươi onwards. We suspect diffraction limitations were largely responsible for this loss of resolution & wonder why Nikon didn’t limit the minimum aperture to lớn f/22 for all focal length settings.The highest resolution was recorded at the 50milimet focal length, with the 35milimet focal length cthảm bại behind. The graph below shows the results of our Imachạy thử tests at all lens aperture and focal length settings. (Test shots were taken at ISO 200.)


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Nikkor-18-105mm-Res-vs-FL-graph

Lateral chromatic aberration remained in the ‘insignificant’ zone for all lens aperture/focal length losingravidos.combinations. The graph below shows the results of our Imathử nghiệm tests, using figures for the edge of the frame (where C.A. is more likely to be visible). The red line at 0.04% delineates the border between the ‘insignificant’ and ‘low’ zones. We found no evidence of coloured fringing in kiểm tra shots taken in contrasty conditions.

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Nikkor-18-105mm-CA-graph

Slight corner vignetting (edge darkening) was found in kiểm tra shots where subjects were photographed with White backgrounds. Barrel distortion was observed in kiểm tra shots taken with the 18mm setting but it vanished by 25milimet to be replaced by slight pincushioning at 105mm. At no time was either distortion severe enough to lớn affect everyday photography.Flare was only visible when the camera was pointed directly towards the sun và even then it was well controlled. Bokeh was soft and quite attractive. The image stabilisation system performed extremely well and we were able lớn use the camera hand-held at shutter speeds down to lớn 1/8 second with the 50milimet focal length & 1/13 second at 70milimet.

SAMPLE IMAGES


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Nikkor-18-105mm-wide
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Nikkor-18-105mm-tele

Picture angle: 76 degrees to lớn 15 degrees trăng tròn minutesMaximum aperture: f/3.5-5.6Minimum aperture: Lens construction: 15 elements in 11 groups Lens mount: Nikon F-BayonetDiaphragm Blades: 7 (rounded)Minimum focus: 0.45 metres at all focal lengthsFilter size: 67mmDimensions (Diameter x L): 76 x 89 mmWeight: Approx. 4đôi mươi grams

 

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