Automatic focusing device for astronomical photography single reflection lens

Abstract

The invention discloses an automatic focusing device for an astronomical photography single reflection lens and particularly relates to an astronomical photography single reflection lens adjusting device with a fine tuning control function, and belongs to the technical field of astronomical photography focusing. The device comprises a step hoop frame and a motor drive unit. The device is a modular double-hoop fixing structure based on the Z-axis balance and achieves automatic focusing by controlling rotation of a focusing ring by a hold-in range, so that the automatic degree of the astronomical photography focusing is effectively improved, and the problems of jitter error caused by manual operation of the focusing ring and the short focusing stroke are solved, and finally the effect of the single reflection lens for astronomical photography is improved, which makes the astronomical photography more convenient for the majority of single reflection lens users.

Description

technical field [0001] The invention discloses an automatic focusing device for astronomical photography single-lens reflex lenses, in particular to an astrophotography single-lens reflex lens adjustment device with a fine-tuning control function, and belongs to the technical field of astrophotography focus adjustment. Background technique [0002] Astronomy is today one of the most influential and fastest-growing disciplines in science. For astronomy, astrophotography is like human eyes, and it is an important means for astronomers to obtain data and information of electromagnetic radiation from celestial bodies. In recent years, astrophotography has gradually become popular among the general public, and many astronomy enthusiasts have also begun to try to use SLR cameras for astrophotography. [0003] In astrophotography, because the celestial body is extremely dim, the autofocus system of the SLR lens cannot work, and manual focus is required. However, compared to heavy...

AI Technical Summary

Problems solved by technology

[0003] In astrophotography, because the celestial body is extremely dim, the autofocus system of the SLR lens cannot work, and manual focus is required

However, compared with heavy astronomical telescopes, SLR lenses are lighter in weight, and the jitter generated during manual focusing is very large, resulting in more severe jitter of the star point in the picture, making it more difficult to realize the method of focusing according to the size of the star point

In addition, due to the extremely short focusing stroke of the SLR lens, the difficulty of focusing is even greater.

These have seriously affected the quality of astrophotography

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