Variable magnification finder and imaging apparatus
AssigneeFUJIFILM Corporation
InventorHiroki SAITO
Life of this patent
Estimating the term…
Abstract
The magnification of the variable magnification finder is switchable, and the finder includes a positive lens group, a negative lens group, and an eyepiece lens group in this order from an object side in a high magnification state. The positive lens group is retracted from an optical path of the variable magnification finder to the outside of the optical path and the negative lens group moves toward the object side when magnification is changed from the high magnification state to a low magnification state. The following conditional formula is satisfied when the focal length of the negative lens group is fN: −15 mm<fN<−5 mm.
Claims13
A variable magnification finder, the magnification of which is switchable, the finder comprising:
- a positive lens group having positive refractive power;
- a negative lens group having negative refractive power;
- and
- an eyepiece lens group in this order from an object side in a high magnification state,
- wherein the positive lens group is retracted from an optical path of the variable magnification finder to the outside of the optical path and the negative lens group moves toward the object side during magnification change from the high magnification state to a low magnification state, and
- wherein the following conditional formula (1) is satisfied when the focal length of the negative lens group is fN:
- −15 mm<fN<−5 mm (1).
Dependencies are inferred from the claim text.