器材 【原创】试用A33和A55-SONY新单电系列

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http://dcbbs.zol.com.cn/77/167_765897.html

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作者: 鲁莽电工

我没有从T1i 到 T2i，而是从XTI到T2i，所以感觉很明显。
本来换代到T2i图的是高清录像功能，结果拍照效果也得到了很好的提升。

**T2i高清摄影的对焦要点：
刚开始使用的时候，不知道这个窍门，拍摄中进行变焦的时候画面就模糊了焦点。经过摸索，我发现，开始拍摄之前就要用最长焦距对焦...

What kind of manfrotto head do you use? 804rc2 or 49xRC2?
any feedback? Thx

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作者: -GoGoGo-

我主要用腾龙双3X, 17-50/2.8 70-200/2.8, 两三年前$399和$599美元买的

just bought a Tamron 17-50 (A16, non VC version). after couple days of use, i found this lens has a back focus issue. (tested my other lenses on my A33, and they are fine. so the issue is the lens no the camera).

My issue is pretty much similar to this:

http://www.dcresource.com/forums/sho...50mm-SAL50-F14

Is that a big deal?
Does your A16 have any front/back focus issue?

Thanks in advance!

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>>"A33/A55的软件可能有自动纠正偏焦的功能"
can you give me some detail please?

This is my second Tamron lens, My first one is the SP 90 marco, and it is fine.

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作者: -GoGoGo-

我也只是这么一瞎猜和瞎说, 我有一个50 1.4, 一开始的几十张总是觉得有偏焦的样子, 好象焦点固定偏前, 然后我就大光圈时候只要有可能干脆就手动对焦了(A33/A55有自动中心放大来辅助手动对焦), 然后某一天发现这镜头自动对焦也不偏了, 再然后就一直到今天都貌似不偏

Thanks.
Good to know, I only use the MF for my marco shoots. I will try it out and let your guys know the result.

How about your A001, this will be my next target
副厂头呀， 爱你不容易

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my copy of tamron A16 also has the famous "腾龙黄", I compared with my kit lens (18-55)

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作者: 流浪家族

前段时间凑热闹也收了一只腾龙A016，刚刚卖掉了。
A016的锐度确实很好，全焦段2.8可用，F4就纤毫毕现了。据前用户说他拿去腾龙调了一次焦，可见部分产品是会跑焦的，个体差异是存在的。
腾龙的色彩不讨喜，这是我不喜欢的主要原因。户外自然光，A016的白平衡还算马马虎虎，但是和原厂镜以及我手头的...

A016的锐度, F2.8, 价格是优势, 还有名气.
缺点是 色彩, CA @17mm, 对焦速度, 准确和成功率.
做工一般.

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作者: -GoGoGo-

A33/A55没有微调

A33/A55有两套对焦系统是一起工作的, 一套相位, 一套对比, 其实我也没搞明白两套对焦如何能一起工作, 或许是对比可以辅助相位的偏焦微调, 也没搞明白为什么我这个SIGMA 50 1.4后来就自己准焦了, 50 1.4本来是借朋友的全新的来玩一下, 结果可能不关机...

I'm not quite sure what the issue your sigma lens really is, but please check this link out:
sigma describes the problem with some older lenses being used with SLT cameras:
http://www.sigma-photo.co.jp/english...nfo_100910.htm

also check the compatible mark on your box.