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索尼A6400无反转相机版本:实时对焦和实时跟踪,最快的对焦系统_我的网站

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一 | 1月16日,据外媒消息,索尼今天发布了最新的反反射相机。    

With pressure mounting to avert a government shutdown, heightened by culture war demands from House conservatives burned by previous brawls, the House speaker faces a difficult decision – risk a shutdown or risk the gavel.
That was 2015. But 2023 is treading a similar course.
For former House Speaker John Boehner, it was the final chapter in a lengthy standoff with House conservatives that contributed to his resignation from Congress after 25 years and almost five in the top job. For current House Speaker Kevin McCarthy, just seven months into his tenure, the outcome remains an open question.
With a looming deadline to fund the government and much left to be accomplished upon Congress’ return from recess, McCarthy and other congressional leaders expressed willingness earlier this month to pass a stop-gap measure to keep the government funded, buying lawmakers more time to work out the 12 appropriations bills they’ve been pursuing. But demands from the House Freedom Caucus have complicated the effort and put McCarthy in yet another bind from the right that analysts say could be the one to put his leadership position on the line.
“This is now the most important fight he faces as speaker and the choice between kind of the campaigning arm, the House Freedom Caucus arm, and the actual governing arm of keeping a government running,” says Casey Burgat, the director of the Legislative Affairs Program at George Washington University’s Graduate School of Political Management.
McCarthy has walked a fine line with the conservatives since the speaker battle, when they took him 15 grueling rounds before granting him his win, and in turn gained the power to bring up a vote for his ouster, lowering the threshold to just a single lawmaker.
So when the House Freedom Caucus announced it would oppose a stop-gap measure to keep the government funded unless certain conservative provisions are includes – like addressing DOJ "weaponization" and ending "woke" Pentagon policies – it prompted a confrontation with McCarthy that’s been brewing and bubbling in fits and starts for months, ready to boil over.
Such legislation would lose support among House Democrats and face steep odds in the Democrat-controlled Senate, making a shutdown likely. But without the support of conservatives on a clean continuing resolution and only a few votes to spare in the GOP narrow majority, McCarthy will likely need to rely on Democrats to approve a stop-gap measure – a move sure to provoke the hard-liners in his caucus.
“This is where his choice comes in,” Burgat says. “If he takes Democratic support, which likely he'll need to do, then that opens himself up to at least a motion to vacate because it only takes one now.”
The contours of the standoff were previewed during the debate over the debt ceiling, as House conservatives demanded controversial spending cuts and policies that put McCarthy in a difficult negotiating position with Democrats and the White House. Ultimately, Democratic votes on the debt ceiling agreement outnumbered Republicans in the House in a turn of events that infuriated some members of the House Freedom Caucus.
That same small but vocal minority – numbering in the mid-30s out of 222 Republicans in the chamber, though the caucus doesn’t publicize the exact number – made their frustration known just days later, when they blocked a routine vote, sending the chamber into a week-long gridlock. At the chamber’s reunification, McCarthy told reporters they had agreed to “sit down and talk more” in future spending negotiations. And shortly after, Republican appropriators agreed to mark up the 12 spending bills well below the levels agreed to in the debt ceiling deal in what appeared to be a major concession made to the House Freedom Caucus that has colored the funding process so far.
But this time, emboldened by the shortcomings in the last fiscal battle, they may come out with a greater show of force, as McCarthy faces what political science professor Rob Mellen Jr. calls a “no win situation.”
“I think this might be the fight they're willing to go to the mat for,” says Mellen, of the University of South Florida. “That this time if he really doesn't feel like he's going to compromise with them and give them what they want, that they may be willing to just say, ‘Hey, we'll shut this down. We'll go that direction, and we'll remove you if you go to the Democrats.’”
Members of the Freedom Caucus have for months suggested that they would be willing to let the government shut down if they don’t agree with the funding package. Indeed, for the conservatives, who largely hail from safe districts, there isn’t much to lose, as analysts note that if the government shuts down and Republicans are blamed, the conservatives won’t be on the chopping block like their colleagues in swing districts.
But some have noted that for the Freedom Caucus, perhaps armed with the understanding that their demands have little chance of becoming reality, the ultimate goal may be McCarthy’s removal after all.
“It just puts McCarthy in this bind and sort of forces his hand almost to do what he did before, which is get the government funded with Democratic votes, and in so doing, they can respond by triggering a call for his removal,” says David C. Barker, professor of government and director of the Center for Congressional and Presidential Studies at American University. “And I think that's what they're agitating toward. That's what they want. That's kind of what they wanted from the beginning. And they've been looking for a mechanism to do it. And I think maybe all along they've planned on this being the one.”
True to form, Rep. Ronny Jackson of Texas didn’t mince words about McCarthy’s dilemma with the Freedom Caucus last week, calling a motion to oust McCarthy “inevitable” if he continues to rely on Democrats.
“McCarthy’s going to have to listen to the people on the right or else he’s going to have to rely on the Democrats to pass this,” Jackson said on Steve Bannon’s “War Room” podcast. “But I’m telling you if that happens, I mean, it’s going to be detrimental to leadership in the House if they blow off the concerns of the people like myself and Freedom Caucus and some of the other people on the right that are making reasonable demands in this process – it’s going to be a problem.”
Whether McCarthy can rely on Democrats to back a CR is one thing. But whether they’ll protect his gavel is another matter altogether.
Some dynamics suggest at least some Democrats would come to his aid, like reports of a coalition of Democrats offering McCarthy a deal during the debt ceiling fight that they would help him keep his job should he responsibly raise the debt ceiling. Another calculation for Democrats is McCarthy’s possible replacement, who likely wouldn’t align more closely with their positions, making McCarthy’s retention arguably in Democrats' best interest.
But even if McCarthy survives a motion for his ouster with the help of Democrats or calls conservatives’ bluff and his speakership isn’t ultimately threatened, analysts say his hold on the conference will remain shaky and his ability to get things done stunted.
“He can only afford to lose four. And if there's 40 that are just mad at him all the time, then they're going to be reluctant to support him even if it's on things that they want to,” Burgat says. “They've proven willing to shut down the chamber even when it's run by their own party. And so, as much as he'll defang them on this one vote, he'll need them again for any Republican priorities to be passed out of the House heading into an election year.”
It’s a dynamic that haunted Boehner for years and ultimately contributed to his early departure. And the House Freedom Caucus has only grown bigger and more brash, releasing statements and listing demands publicly, while McCarthy’s margin is just a fraction of what the former speaker’s was in 2015.
“McCarthy is closer to being one of them than Boehner ever was,” Barker says. “Boehner really was more of a traditional Chamber of Commerce-type of Republican whereas McCarthy stylistically and policy-wise for some time now has been a MAGA-friendly flame thrower right in line with them. He certainly was during the Trump years. And so, you know, it just shows their willingness to eat their own.”
Unlike McCarthy, Boehner was already on his way out, planning to resign months later, when he made the decision to step down. Even then, he noted that had he not been planning to leave, he wouldn’t have done so when talk of a motion to vacate began swirling.
“It was never about the vote. There was never any doubt about whether I could survive a vote, but I don’t want my members to have to go through this, and I certainly don’t want the institution to go through this, especially when I knew I was thinking about walking out the door anyway,” he told reporters at the time.
When asked what advice he would give to McCarthy, then his presumed successor, he urged the California Republican to protect the institution. And when questioned by another reporter about whether the next speaker would ultimately face the same fate, he earnestly replied.
。新的A6400具有令人印象深刻的规格和一系列新功能,包括实时眼睛自动对焦、实时跟踪和世界上最快的自动对焦。A6400的内部是一个2420万像素的APS-C Exmor CMOS传感器,带有最新一代的BioNZ X图像处理器。其最大ISO为3200(可扩展至102400)。它可以使用机械快门以每秒11帧的速度连续拍摄照片,或者静音以每秒8帧的速度连续拍摄照片。具有完整的AF/AE跟踪功能。缓冲区可以捕获多达116个jpeg帧或46个原始压缩帧。A6400的主要优点之一是它的自动对焦功能。该相机具有425相位和对比度检测自动对焦功能,覆盖了84%的图像区域。索尼声称,自动对焦系统是世界上最快的,锁定物件只需0.02秒。A6400还引入了索尼新的高级“实时眼AF”和“实时跟踪”功能。

二 | 实时眼AF是索尼眼AF技术的最新版本。它使用基于人工智能的目标识别来检测和跟踪眼睛,提高了准确性、速度和性能。”在所有的自动对焦模式中,相机现在可以自动检测到物体的眼睛,并用半按快门按钮激活自动对焦。在AF-C或AF-A模式下,可以选择首选的眼睛(左或右)作为焦点。

三 | 选择包括自动/右眼/左眼,开关右眼/左眼功能也可以被指定为自定义功能。“索尼还将扩大动物的眼睛跟踪,这是野生动物摄影师的一个宝贵功能。

四 | 该功能将在2019年夏季通过摄像头固件进行更新。实时跟踪还使用相同的基于人工智能的系统来识别主题,并确保它们被准确捕获。”实时跟踪是一种新的物体跟踪功能,跟踪焦点中最具挑战性的运动物体。在半按快门按钮时选择要跟踪的任何主题的能力提供了新的框架灵活性,允许用户更多地关注图像。如果焦点在一个人身上,那么人工智能将被用来实时检测和跟踪对象的眼睛和脸,以达到非常高的跟踪精度。A6400的背面是一个3英寸、180度倾斜的触摸屏LCD显示屏,非常适合自拍和视频博客。EVF上方是一个236万点xga Tru取景器OLED电子取景器。对于视频拍摄,A6400可以拍摄具有全像素读取和无像素合并的内部UHD 4K。

五 | 索尼说,相机收集到的数据“大约是4K电影所需数据的2.4倍,然后进行过采样,以产生具有出色细节和深度的高质量4K材料。”1080p全高清图像质量可以在120 fps和高达100 Mbps的速度下拍摄。其他视频功能包括S-log2和S-log3、用于即时HDR工作流的混合对数伽马(HLG)图像配置文件、内置间隔计、AE跟踪(高、中、低)、斑马函数、伽马显示助手和代理记录。A6400的其他功能和规格包括弹出式闪光灯、内置Wi-Fi和NFC、八个自定义按钮(具有89种不同功能)、增强的菜单可用性、菜单帮助屏幕、照片星、坚固的镁合金机身和额定200000次循环的百叶窗。这是一张使用索尼A6400拍摄的官方照片:新的索尼A6400反反射相机将于2019年2月推出并以900美元(约6085元)的价格发货。它还将与16-50毫米f/3.5-5.6镜头(1000美元,约合6761元)或18-135毫米f/3.5-5.6镜头(1300美元,约合8789元)配套使用。

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