39-02-3A

The application field and working principle of 39-02-3A is an important area of optics that is applied to the development of lenses. The 39-02-3A is a type of optical device known as a Cooke triplet lens. It is a very popular lens type and has been used extensively in photography since it was first developed. The basic structure of the 39-02-3A consists of three elements: a positive front element, a negative middle element and a positive back element.

A Cooke triplet lens works by gathering light and focusing it through each element in a specific order. The positive front element gathers light from the object being photographed and refracts it. The negative middle element then further refracts the light and forms an image. Finally, the positive back element corrects the aberrations in the image formed by the middle element. The light rays converge at the focal plane of the lens, forming a clear and sharp image of the subject.

The 39-02-3A is a very versatile lens and is suitable for many different types of photography such as landscape, portrait, and macro. It is widely used for astrophotography because of its excellent performance in terms of resolution, color correction and chromatic aberration. The 39-02-3A lens has a very short focal length of only about 25mm, which results in a very wide angle of view. This makes it ideal for capturing wide angle views of the landscape, while still allowing for sharp and detailed shots of objects in the foreground.

The 39-02-3A is a very fast lens with a large maximum aperture of f/2.8. This allows for very high shutter speeds when photographing in low light conditions, eliminating the need for a tripod or studio lighting. In addition, this lens has excellent sharpness and clarity even at its widest aperture, making it perfect for landscape and indoor photography.

The 39-02-3A is also a very budget friendly lens that offers excellent performance, making it a great choice for photographers on a budget. Although not as fast as some more expensive lenses, it is still capable of producing impressive results, especially when used in the right circumstances. In combination with a higher quality DSLR camera, it is possible to get stunning images with the 39-02-3A lens.

The 39-02-3A lens is a great option for many types of photography, especially for those looking for a versatile and budget friendly lens. Its unique structure and design allow it to perform well in many different applications and produce excellent results for any photographer. With its wide angle of view, fast maximum aperture, and excellent sharpness and color correction capabilities, the 39-02-3A lens is an excellent choice for any photographer.