踏雪留痕
2020-8-16 10:56:10
見到有個留言,待FC
——open—
Glad somebody pointed this out. Just to elaborate. Focusing wide open gives the sensor more light and also more phase information as light is hitting the AF points from the edges of the lens. This results in more accurate AF. When focusing manually you get the smallest DOF which makes it easier to see focusing errors as well.
The problem is that when you're focusing between continuous shots the lens aperture needs to open and shut between every shot. I've heard that Sony didn't want to design the lenses to handle this, but Canon did. Just as your shutter wears with every shot taken, so does your lens aperture with this focusing system.
Optically though it gives you the best result.
—end—
#2 常見問題
#3 EOS M系統機身
#4 APS-C 單反機身
#5 Full Frame 單反
#6EOS R無反機身
#7 EF-M 鏡頭
#8 APS-C 鏡頭
#9 Full Frame 單反鏡頭
#10 Full Frame 無反鏡頭
Updates
1. EOS R5
• 全球首部 8K 全片幅無反
• 支援無裁切 8K 30p 及 4K 120p 短片
• 內置機身防震,提供高達 8 級防震效果
• 全新 4,500 萬高像素 CMOS 影像感應器
• 100% 自動對焦範圍
• 人物頭部/動物偵測自動對焦
• 最高 20 FPS (電子快門) / 12 FPS (機械快門) 並支援追焦
支援雙記憶卡 (CFexpress + SD UHS-II)
定價 HKD $30,880
Canon 無反5系新機 Spec暫時屌打晒市場上所有同級產品 痴撚線相機
2. EOS R6
• 源於旗艦單反 EOS-1D X Mark III 嘅 2,010 萬像素高感光 CMOS 影像感應器
• 內置機身防震,提供高達 8 級防震效果
• 100% 自動對焦範圍
• 人物頭部/動物偵測自動對焦
• EV-6.5 低光自動對焦
• 最高 20 FPS (電子快門) / 12 FPS (機械快門) 並支援追焦
• 支援無裁切 4K 60p 及 120p 短片
支援雙記憶卡 (2 x SD UHS-II)
定價 HKD $19,880
Canon 無反6系新機 同R5 比少左像素 raw 4k 120 mon細啲 其他差唔多 但平10000 窮人之選
3. RF 新鏡
RF 100 - 500 f/4.5 - 7.1L IS USM (去到363有5.6)
RF 600 mm f/11 IS STM
RF 800 mm f/11 IS STM
RF 85 MM f/2 Macro IS STM
RF 1.4x
RF 2x
4. EOS 850D
唔知 無睇 想買直接買90D thanks