請問Tamron A18 (18-250mm) 拍的出星芒嗎?

如題,爬過很多文了,不過實在是找不到答案
日本原廠的網頁也只知道是七片葉片,但是如果是圓形葉片也是拍不出星芒的
所以想請站上高手幫忙回答一下, Thanks a lot

2008-03-07 21:10 #1

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linkaungwan

29分

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linkaungwan

個人積分：29分

文章編號：5228201

真是糟糕,好像沒人回
好想知道答案呀~~~

folding@home 簽名檔, 請多指教 http://folding.extremeoverclocking.com/sigs/sigimage.php

linkaungwan

29分

樓主

linkaungwan

個人積分：29分

文章編號：5231549

好吧,我找到答案了
http://www.beachcamera.com/shop/product.aspx?sku=TM18250PA
Experience the great power of a 14X zoom range and enjoy an amazing 2 in 1 zoom. Tamron's new high-power 18-250mm zoom is a photographer's dream come true - a single lens capable of shooting both wide angle and ultra telephoto scenes. Conventional 35mm film cameras always required two lenses to handle the 28-400mm range. But Tamron's new high-power zoom - at 13.9x, the world's most powerful zoom - delivers all the photographic freedom of this enormous range in a single, compact lens. The life of a digital photographer has never been better with this take-it-anywhere all-in-one lens, the ultimate high-power zoom for seamless shooting. *Like a 28-400mm lens in 35mm format.

Features:

World's Most Powerful Zoom, featuring 14X zoom range
Equivalent to 27-387mm (13.9X)
Like two lenses in one (28-200 + 200-400)
Designed exclusively for DSLRs with smaller imagers
Sophisticated optical system for high quality digital images
Compact & lightweight (3.3 in./15.2 oz.)
*When converted to 35mm format.

Specifications:

Model Name A018
Focal Length 18-250mm
Maximum Aperture F/3.5-6.3
Angle of View 75deg 33'-6 deg 23' (APS-C size equivalent)
Lens Construction 16 elements in 14 groups
Minimum Focus Distance 0.45m (17.7") (Over the entire zoom range)
Maximum Mag. Ratio 1:3.5 (at f=250mm MFD 0.45m)
Filter Diameter 62mm
Overall Length 84.3mm (3.3")*
Maximum Diameter 74.0mm (2.9")
Weight 420g (14.8oz.)
Diaphragm Blades 7 blades (Circular apertures)
Minimum Aperture F/22
Standard Accessory Flower-shaped Lens Hood
Compatible Mount Canon, Nikon-D, Pentax, and Sony

圓形光圈..所以應該是拍不出星芒了

folding@home 簽名檔, 請多指教 http://folding.extremeoverclocking.com/sigs/sigimage.php