Excuse me, there is something wrong with the communication between Canon camera display camera and lens. Please clean your contact lenses. What should I do?

Nikon lens: Auto-focus bayonet is adopted.

Canon lens: EF bayonet is adopted.

Fuji lens: I used to use the special bayonet of Fuji Dragon. Now it uses a Nikon-like bayonet;

Sigma lens: a relatively professional lens manufacturer, with complete bayonet types, can cooperate with most brands of cameras.

Switching between different bayonet lenses requires the use of an adapter ring, but this thing is old and expensive, and it is not easy to buy.

Nikon D300 main parameters Digital camera type: Digital SLR camera effective pixel number:12.3 million LCD screen size: 3-inch memory card type: CF card (I/II, and UD ... anti-shake function: shutter speed is not supported: 1/8000 to 30 seconds, Can be used as 1/ size:147×114× 74mm power supply: rechargeable lithium-ion battery EN- sensor type: CMOS maximum resolution: 4288×2848 macro focusing range: depending on the lens, Quick positioning: basic parameters flash lens shutter exposure control shooting performance framing and other characteristics of display storage format ... 300 basic parameters digital camera type digital SLR camera fault-finding effective pixels12.3 million fault-finding maximum pixels 13 1 0000000 fault-finding maximum resolution 4288×2848 fault-finding sensor type CMOS fault-finding sensor size 23.6× 15.8 mm fault-finding focus mode autofocus: provided by Nikon Multi-CAM 3500DX autofocus module. -1 to+19 EV grading detection (ISO100 at 20°C); Can provide AF fine-tuning focal plane contrast [using "real-time" view (LCD real-time view) (tripod) mode] Pick the wrong release date August 2007 Pick the wrong external flash of Nikon D300 flash camera The effective flash range depends on the external flash; Pick the wrong flash mode synchronous connection: X= 1/250 seconds; The synchronous flash can be as high as 1/320s (FP), and can be adjusted freely when using the built-in flash or buying another flash. (GN will reduce) Pick the wrong hot shoe contact according to the safety lock standard ISO 5 18. The manual exposure focal length of Nikon D300 lens (equivalent to 35mm camera) is equivalent to 1.5 times that of 35mm film camera. Picking the wrong normal focus range depends on the lens. Picking the wrong macro focus range depends on the lens. Picking the wrong lens: Nikon compatible lens: DXAFNikkor, G-type or D-type AFNikkor, other AFNIKKOR, AI-P NIKKOR, and non-CPU framing lens quoted the wrong price. Nikon D300 shutter type electronic control vertical focal plane shutter picked the wrong shutter speed 1/8000 to 30 seconds, which can be used as 1/3,/kloc-0. B-door second fault-finding Nikon D300 exposure control exposure mode 1) program automatic [P] with flexible program 2) shutter priority automatic [S] 3) aperture priority automatic [A] 4) manual [M] fault-finding exposure compensation exposure meter range 1) 0-20 EV (3D color matrix photometry or central key photometry) 2-0 (ISO 100, f/ 1.4 lens, 20oC), photometry coupling CPU and AI to pick the wrong exposure photometry, TTL full aperture photometry cooperation 1005 pixel RGB sensor is used to pick the wrong scene mode portrait, landscape, children, sports, close-up, and the sensitivity range of portrait at night is ISO 200-3200. Step adjustment of 1/2 or 1 EV. When it is lower than ISO 200, it can be adjusted by about 0.3, 0.5, 0.7 or 1 EV (equivalent to ISO 100). When it is higher than ISO 3200, it can be adjusted by about 0.3, 0.5, 0.7 and 1 EV (equivalent to ISO 6400). Automatic adjustment, manual adjustment and automatic preset (TTL white balance, 1, 005 pixel RGB sensor control). Seven manual modes can be preset by fine-tuning. Both color temperature setting and white balance surround can pick up the wrong shooting performance of Nikon D300 (2-9 pictures, increment is 1 ~ 3), video output self-timer function supports 2-20 seconds delay, pick up the wrong image, anti-shake function does not support viewing tripod quotation, pick up the wrong red eye, and support red eye to pick up the wrong image size, 4288× 2848,321 265438 Spain and Sweden pick the wrong Nikon D300 viewfinder and display LCD screen type TFT LCD screen size 3 inches pick the wrong LCD screen pixels 920,000 pick the wrong viewfinder type optics, viewfinder model: single mirror reflective prism with fixed eyes: built-in diopter adjustment (-2.0 ~+1), viewpoint:19.5mm. Kloc-0/.0m- 1), focusing screen: b Magnification: viewfinder coverage is about 100% (vertical and horizontal)/using a 50mm lens. -1.0 m- 1 The magnification is about 0.94 times, and the reflector: the quick-return fault-finding rotary LCD screen does not support fault-finding Nikon D300 storage format memory card type CF card (I/II type, UDMA compatible). The quotation of Microdrive view flash card picked the wrong photo format NEF 12 bit or 14 bit (uncompressed, lossless compressed or compressed raw), tiff (RGB) JPEG: JPEG baseline compatible, compatible with DCF 2.0, DPOF and Exif 2.2 1, Fault-finding audio input does not support other functions of fault-finding Nikon AN-D300, remote control of other functions, full manual support, automatic dust removal device, standard ISO 5 18 hot shoe contact belt safety lock, Portuguese, Russian, Spanish, Swedish fault-finding accessories: rechargeable lithium battery EN-EL3e, fast charger MH- 18a, USB cable UC-E4. Rubber goggles DK-23, software suite installation CD-ROM with software Nikon Transfer Pick the wrong connection type USB 2.0 Pick the wrong power supply to charge lithium-ion battery EN-EL3e, optional battery box: MD-D 10 multi-power battery purchased separately can hold 1 Nikon EN-EL3e, EN-EL4a or EN-EL4 lithium-ion rechargeable batteries or 8 AA alkaline batteries and Ni-MH batteries. EN-EL4a or EN-EL4 and AA batteries need to be purchased separately; When using EN-EL4a or EN-EL4 batteries, you need a BL-3 battery box cover to see the wrong color of charger quotation, and the wrong size of black147×1kloc-0/4× 74 mm to see the wrong weight of camera package quotation, 825.0g wrong printing support PictBridge wrong tripod screw hole 1/4 inch standard wrong shooting. Wrong-picking compatible operating systems Windows Vista, XP (Home Edition Professional Edition), 2000 Professional Edition, Mac OS X (10.3,9 or 10.4. 10) Wrong-picking Nikon D300 environmental parameters Working humidity 85% Wrong-picking storage humidity10-90.