Photographic lens for electronic still camera
AssigneeFuji Photo Optical Co., Ltd.
InventorTetsuya Ori
Life of this patent
Estimating the term…
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AssigneeFuji Photo Optical Co., Ltd.
InventorTetsuya Ori
Estimating the term…
Successively from an object side, a negative lens having a concave surface directed onto an image surface side, a positive meniscus lens having a convex surface directed onto the image surface side, a positive lens having a convex surface directed onto the image surface side, a negative lens having a concave surface directed onto the image surface side, and a biconvex lens are disposed, thereby yielding a photographic lens for electronic still camera which can favorably correct distortion while attaining a compact size and a wide angle of view. Successively disposed from the object side are a negative first lens L.sub.1 having a concave surface directed onto the image surface side, a second lens L.sub.2 made of a positive meniscus lens having a convex surface directed onto the image surface side, a third lens L.sub.3 made of a biconvex lens whose surface with a stronger curvature is directed onto the image surface side, a negative fourth lens L.sub.4 having a concave surface directed onto the image surface side, and a fifth lens L.sub.5 made of a biconvex lens; while being configured to satisfy the following conditional expressions (1) to (4): 0.8<-f.sub.1 /f<1.2 (1) 1.1<f.sub.3 /f<1.7 (2) 1.1<-f.sub.4 /f<1.5 (3) 0.1<.vertline.f/r.sub.3 .vertline. (4)
A photographic lens for electronic still camera comprising successively from an object side, a negative first lens having a concave surface directed onto an image surface side, a second lens made of a positive meniscus lens having a convex surface directed onto the image surface side, a positive third lens having a convex surface directed onto the image surface side, a negative fourth lens having a concave surface directed onto the image surface side, and a fifth lens made of a biconvex lens;
A photographic lens for electronic still camera comprising successively from an object side, a negative first lens having a concave surface directed onto an image surface side, a second lens made of a positive meniscus lens having a convex surface directed onto the image surface side, a positive third lens having a convex surface directed onto the image surface side, a negative fourth lens having a concave surface directed onto the image surface side, and a fifth lens made of a biconvex lens;
Dependencies are inferred from the claim text.