Esta Lente Sigma 120-400mm f/4.5-5.6 DG HSM APO é uma lente zoom ultra telefoto ideal para fotografia de natureza/áreas externas ou de esporte. Isso se traduz em uma faixa equivalente a 180-600mm quando usada com um sensor SLR digital tamanho APS-C.
O uso do HSM (Hyper Sonic Motor), design apocromático APO, 3 elementos de vidro SLD (Special Low Dispersion) e ótica multirrevestida permitem que essa lente ofereça versatilidade e uma performance de alto nível em toda a sua faixa de zoom. Um sistema de foco traseiro oferece foco manual rápido e conveniente e um barril frontal não-giratório.
O design de lente DG aprimorado corrige diversas aberrações. Esta lente é especialmente revestida para a obtenção do melhor balanço de cor, reduzindo os fantasmas causados por reflexos do sensor de imagem digital. A lente oferece a mais moderna correção de aberração cromática lateral, que é um sério problema para câmeras digitais SLR.
Através do acréscimo de um teleconverter Sigma APO opcional, você pode usar essa lente como uma lente zoom ultra-telefoto de foco manual 168-560mm f/6.3-8 com um teleconverter 1.4X EX, ou como uma lente zoom ultra-telefoto de foco manual 240-800mm f/9-11 com um teleconverter 2X.
| Tamanho do Filtro | 77mm |
| f/Stop Range | 4.5-22.0 |
| Distância Mínima de Foco | 4,9 pés (1,5m) |
| Ampliação | 1:4.2 |
| Controle de Foco/Zoom | Dois toques |
| Ângulo de Visão | 20,4-6,2 graus |
| Grupos/Elementos | 15/21 |
| Colar de Tripé | Sim (removível) |
| Comprimento | 8 polegadas (203,5mm) |
| Diâmetro Máximo | 3,6 polegadas (92,5mm) |
| Peso | 3,8 libras (1,750kg) |
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Comments about Sigma 120-400mm f/4.5-5.6 DG HSM APO Autofocus Lens for Pentax AF:
It seems to me an excellent objective referring to its quality price, investigates much on this type of objectives I acquired and it.
I experienced finally it and there is very good similarity to me in the photographic results.
Although with little light its handling is difficult, for me is not much inconvenient
since I try to make natural photography with very good conditions of light.
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Comments about Sigma 120-400mm f/4.5-5.6 DG HSM APO Autofocus Lens for Pentax AF:
I use it for sports and wildlife and realy enjoy it. AF is fast and make about no noise at all so it's very good for nature shooting.
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Comments about Sigma 120-400mm f/4.5-5.6 DG HSM APO Autofocus Lens for Pentax AF:
This is an excellent lens for wildlife photography. The zoom range is ideal for moving objects such as birds. It is fabulous at airshows. The only drawback is that, like many high quality telephoto lenses, it is somewhat heavy. This could be a problem if it is carried for several hours at a time.
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Comments about Sigma 120-400mm f/4.5-5.6 DG HSM APO Autofocus Lens for Pentax AF:
I'm a photographer who loves birds. This lens gets me shots impossible w/a 300mm lens and sharper shots within the range. Its easy to use even hand held.
Build quality appears to excellent. AF is fast. Pictures are sharp. Now if it was only 3 pounds lighter it would be a killer lens.
I bought a binoculars harness and I walk around for hours not noticing the weight of my new K20 and this long heavy lens.
Be aware that the white spot on the top of the lens is the equivalent of the red dot on a pentax lens. Line up red to white the lens fits the camera nicely.
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