ENFOQUE-B

Para enfocar gire el anillo de enfoque hasta que la imagen en el visor aparezca con precision y nitidez. Una vez que el objeto este enfocado, se puede mover el objetivo en forma zoom. El objeto permanecera enfocado durante el movimiento telescbpico del objetivo. Para un enfoque mas nitido use la maxima distancia focal y enseguida reduzca ta distancia focal segun la composicion fotografica que desee.

Se puede enfocar el objetivo usando la escala de distancia que esta grabada en el anillo de enfoque, tanto en metres como en pies. Gire el aniilo de enfoque hasta que el punto negro este" colocado frente al numero que corresponda a la distancia estimada o medida entre la camara y el objeto.

Pantallas de Enfoque Recomendadas

Hay disponibles diversos pantallas de enfoque intercambiables diferentes, para las camaras Nikon F2 y F3, que cubren cualquier tipo de objetivo o situacion fotografica. Aquellas recomendadas para usarse con el de Zoom- Nikkor 25-50mm f/4 se indican en el cuadro siguiente.

Pantalla A / L B C D E Gl G2 G3 G4 I HI H2 H3 H4 J K/P^M R T

ICuando a este objetivo se le adhiere el teleconvertidor TC-200, remitase a la siguiente tabla:

P^»* A/L B C D E Gl G2 G3 G4 HI H2 H3 H4 J K/P M R T

 

F2

 

 

Los teleconvertidores TC-14 y TC-300 no pueden usarse con este objetivo.

0 =

Enfoque excelente

 

® =

Enfoque aceptable

 

 

La imagen es brillante de un borde al otro, pero la parte central del visor

 

microprismatico o reticulado es oscura Enfoquese sobre la parte mate de

 

alrededor.

 

 

0 =

Enfoque aceptable

 

 

Una imagen ligeramente difusa (fenomeno de moire en el caso de

 

microprisma) aparece en la imagen de la pantalla. Sin embargo, la

 

imagen en la pelicula no muestra indicios de esto.

 

El espacio en bianco significa que no se puede usar.

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Nikon Zoom-Nikkor 25-50mm f/4 instruction manual Enfoque-B, Pantallas de Enfoque Recomendadas

Zoom-Nikkor 25-50mm f/4 specifications

The Nikon Zoom-Nikkor 25-50mm f/4 is a versatile and compact zoom lens that has become a favorite among both professional photographers and enthusiasts. It was released in the 1970s as part of Nikon's F series lenses, designed primarily for 35mm film cameras but remaining popular in the digital age with compatible DSLR and mirrorless systems.

One of the standout features of the Nikon Zoom-Nikkor 25-50mm f/4 is its constant maximum aperture of f/4 throughout the zoom range. This capability ensures consistent exposure settings and depth of field control, making it an excellent choice for varied shooting conditions. The lens covers a wide focal length range, from a moderately wide 25mm to a standard 50mm, enabling photographers to capture a variety of scenes—from expansive landscapes to intimate portraits.

The lens incorporates several advanced optical technologies designed to enhance image quality. The construction includes multiple elements arranged in groups, effectively minimizing distortion and aberrations typically associated with zoom lenses. Nikon's proprietary Super Integrated Coating (SIC) further reduces flare and ghosting, resulting in impressive color accuracy and contrast.

Another significant characteristic of the Zoom-Nikkor 25-50mm f/4 is its compact and lightweight design. Weighing merely 600 grams, it offers portability without sacrificing durability. The lens barrel is made from high-quality materials, ensuring reliability in various shooting environments. The design also features a smooth zoom mechanism that allows for precise framing adjustments.

Focusing is made easy with the lens's close focusing capability, allowing for effective close-up work. The focus ring operates smoothly, allowing photographers to fine-tune their shots accurately. Additionally, the lens is compatible with Nikon's extensive range of accessories, including filters and hoods, enhancing its versatility.

In conclusion, the Nikon Zoom-Nikkor 25-50mm f/4 remains a trusted companion for photographers seeking a reliable zoom lens that combines excellent optical performance with practicality. With its constant aperture, superior coating technologies, and robust design, it is a perfect choice for anyone wanting to explore the art of photography, making it an enduring classic in the world of photography lenses.