想入一个定焦，室内和弱光环境用，大家有比较过索尼35 1.8和适马30 1.4的吗？价格差一倍。1.8光圈够用吗？有对两个镜头比较过的吗？

个人认为都是收点光圈成像更好些，至于1.8光圈够不够用，其实跟实际拍摄环境和你对虚化的要求关系较大！

35 1.8 用的就是中心对焦点

[zwjdd 编辑于 2010-12-02 13:19]

我承认想上适马就是中了你的毒。请教一下，1.8光圈室内够用吗？我用A33，高感稍差。

你买的哪个啊？

对焦点是一字或十字会好点，所以用中心对焦点还行

我买这个就是想弱光下拍小孩，结果很杯具，弱光下跑焦很疯狂，白天不跑焦。。。晚上现在都手动。。。换过一个了，也是一样，A33机身上的表现，不知道在高端机上如何。

冲着下面这个评测，加上适马无hsm，有跑焦风险。准备入35 1.8了。

现在轻便十大优点的。

我想sony发售这几个镜头35、50、85，就是冲着轻便来的。

The little Sony DT 35mm F/1.8 SAM lens turned in a stellar performance.  The good points are; center sharpness is very high, even at F/1.8!  The mid-sections and corners sharpen up almost to match the centers at F/5.6-8, so it would make a great landscape/architecture lens.  Color fringing is well controlled overall, and distortion is about average, but has a simple, easy to correct curve.  The Sony DT 35/1.8 makes a great walk-around lens because of its small size, light weight, focal length, and fast aperture.  Now for the bad points; well, there aren't any bad points, that's cool!  Nit pickers might complain about light fall-off being a little heavy wide open, but it transitions gradually away from the corners, so it isn't all that apparent, especially in low-light shots.  The corners are soft at wide apertures, but again, it may not be very noticeable in low-light.  Everything considered; this is a very good lens.



Something to think about; you're out taking pictures in low light with the 18-55mm F/3.5-5.6 kit lens.   You're probably going to be at F/4 or F/5.6 when zoomed out a little bit.  Using the 35mm F/1.8 with a shutter speed of 1/10 at F/1.8, ISO 400, you can just hand hold the camera for sharp shots.  At F/5 with the zoom, you're forced to ramp up the ISO to 3200, which is going to be good for a small print only.  Worse yet, if you started off at ISO 1600 (still relatively clean) with the 35mm, you'd be forced to use ISO 12,800 on the zoom, that would be a smeared up mess!



For APS-C only users; Do yourselves a favor; save about $1200 by purchasing this lens instead of the Sony 35mm F/1.4 G lens.   There is a slight advantage in light gathering power with the "G" lens, but the DT 35/1.8 is better at ghosting control, and coma wide open.  I don't have the "G" lens to compare the two, but based on memory, I'd say there is little difference in sharpness overall, with the "DT 35/1.8" coming out ahead at apertures wider than F/2.8.



Some readers are wondering which lens is better for them when using an APS-C camera, the new Sony 35mm F/1.8, the Sigma 30mm F/1.4, or the Minolta 35mm F/2.  I don't know which one is best, it all depends on what's important to you, but here's my quick take; my review copy of the Sigma 30mm was pretty sharp in the centers, but very soft along the sides, even stopped down; on the other hand, It's 2/3 of a stop faster than F/1.8.  The Minolta 35mm F/2 is sharp all over, but suffers from poor ghosting control, and is much more expensive than the Sony 35/1.8.  If high optical performance with a low price tag is important, the Sony DT 35mm F/1.8 SAM is a no brainer.  



Bottom line; this is a five star lens when you consider the optical performance and price point.

35/1.8我刚刚出掉了，要说唯一的优点嘛，就是轻便。。。

打不开，被和谐了？？能引用下结论吗？

我的问题跟你相似，你压我帖子，呵呵，

我在用30 F1.4，我感觉比35 F1.8好（35 F1.8是塑料屁股的呵呵），手感差太多了，虽然适马东西也做得不怎么样但是索尼真的是太小气了。而且适马的是8片光圈叶片，焦外理论上更远一些，我没做过对比。

http://www.kurtmunger.com/sony_dt_35mm_f_1_8_reviewid235.html

这个是完整测评，可以看看。

索尼和宾得口都不是HSM对焦的。而且，跑焦的几率很大，买的时候需要仔细挑选。

用过适马30F1.4，边缘画质有点差，传说中的跑焦没遇到过。听说原厂出了35F1.8，义无反顾的入了。。。。做工适马胜出、颜色原厂当然要好些。

似乎索尼口的没有hsm，我也在适马官网上看了，sony口的型号没有hsm的。

肯定是适马301.4，，我用过，，HSM对焦声极小，对焦迅速，近摄画质超赞，拍远处画质一般，，但也不错，个人感觉和索尼35 1.8完全是两个级别的东西。