Tweedehands Nikon 105mm f/2.8 FX AF MICRO-NIKKOR CM2274
€ 199
- Prijs:
- € 199
- Sinds:
- 12 dagen
- Gezien:
- 9 keer
- Adverteerder:
- Cameraland
- Activiteit:
- 6 jaar actief op Marktnet
This is Nikon's original 105mm AF Micro and it's a great lens. I bought this one used in 1999. It focuses right up to 1:1 life size with no fooling around. If focuses quickly in both AF and manual modes. And yes, of course it's sharp all over at every distance and f/stop.
This 105mm was replaced by a newer VR version in 2006.
This version has at least two separately cammed groups of internal elements that move separately from one another as the focus is changed. This keeps the optics optimized at all distances. For this reason you will probably hear klunking if you shake your lens. This is normal.
In the old days of manual focus lenses, most lenses were built of glass bolted into a single solid metal barrel. The whole thing moved in and out to focus as one unit. There were only about two moving parts, and the tiny space between those was filled with a light grease so there usually was NOTHING to rattle. Therefore, the rattle test was popular for checking used equipment.
Modern AF lenses often run dry without grease. They are made to focus with as little drag as possible to help reduce the drag on the AF motors. Therefore most will clunk a little bit and have some play.
Nikon's premium CRC (automatic close-range correction) lenses have at least two separate sets of elements moving in relation to each other as one focuses. This is done so that the lens retains optimum performance as the distance changes. These tend to rattle more because there is more stuff moving around. The ultra-wides and fast wides were first ones to have this feature starting in 1969. All the micro/macro lenses since 1977 have had this. Nikon uses extra sets of helicoids to control the different groups of elements.
The 105 AF is more amazing still. Not only does it have CRC, but now the internal elements are all moving around on cams as you focus! Some elements move non-linearly while focusing from one end to the other. Cams allow Nikon continuous control of element position, and not simply linear control as a helicoid does. These cams will rattle a lot more then helicoids, and the 105 AF Micro has several cams:
This 105mm was replaced by a newer VR version in 2006.
This version has at least two separately cammed groups of internal elements that move separately from one another as the focus is changed. This keeps the optics optimized at all distances. For this reason you will probably hear klunking if you shake your lens. This is normal.
In the old days of manual focus lenses, most lenses were built of glass bolted into a single solid metal barrel. The whole thing moved in and out to focus as one unit. There were only about two moving parts, and the tiny space between those was filled with a light grease so there usually was NOTHING to rattle. Therefore, the rattle test was popular for checking used equipment.
Modern AF lenses often run dry without grease. They are made to focus with as little drag as possible to help reduce the drag on the AF motors. Therefore most will clunk a little bit and have some play.
Nikon's premium CRC (automatic close-range correction) lenses have at least two separate sets of elements moving in relation to each other as one focuses. This is done so that the lens retains optimum performance as the distance changes. These tend to rattle more because there is more stuff moving around. The ultra-wides and fast wides were first ones to have this feature starting in 1969. All the micro/macro lenses since 1977 have had this. Nikon uses extra sets of helicoids to control the different groups of elements.
The 105 AF is more amazing still. Not only does it have CRC, but now the internal elements are all moving around on cams as you focus! Some elements move non-linearly while focusing from one end to the other. Cams allow Nikon continuous control of element position, and not simply linear control as a helicoid does. These cams will rattle a lot more then helicoids, and the 105 AF Micro has several cams:
Meer informatie:
https://www.cameraland.nl