| 摘要 |
<p>PURPOSE:To simplify the association mechanism between the photography system and finder system and to vary the power of the finder system as well as the photography system by arranging a reflecting mirror which reflects the luminous flux from a subject to the finder system so that the reflecting mirror can freely be extracted, and moving a finder objective linearly associatively with the movement of the moving lens group of the photography system at the time of varying power. CONSTITUTION:The finder objective 8 is arranged in the optical path of reflection of the reflecting mirror 7, the finder objective 8 is moved on the optical axis associatively with the power variation of the photography system to vary the finder power, and the other piece of luminous flux split by a half-mirror 9 is guided to a light measuring means 18 or distance measuring means. When the power of the finder system is varied, the 2nd lens group 2 of a photographic lens 20 is moved nonlinearly on the optical axis and the finder objective 8 is moved linearly on the optical axis to prevent a primary image formation plane 11 from shifting in position owing to the power variation. Consequently, the photographic lens system is reduced in size on the whole and a finder image having no finder parallax can be observed.</p> |
