Exposure consistency：By placing a gray card in the scene to be shot, make it at a specific angle with respect to the direction of the incident light, and use a reflection photometer to read the readings, which can ensure that the photographer is in the whole shooting process Maintain consistent exposure. | Gray White Balance：The gray side is used for exposure correction, and the white side is used for white balance setting. The gray card can be used for in-camera white balance or post-processing white balance. | Wide application：For photographers or amateurs, it is an indispensable part of the digital photography process. | High performance：The gray card provides a convenient reference for white balance or color balance, so that the camera can compensate for the light source color in the scene. When working under different lighting conditions, complex technical issues surrounding exposure and color correction can be simplified.

Fix and balance your tele lens：It helps you fix and balance your tele lens which is heavy or long hanging off the front of camera. | Suitable for Canon series：Suitable for Canon EF 70-200mm f/4L USM, for Canon EF 70-200mm f/4L IS USM, for Canon EF 300mm f/4L USM, for Canon EF 400mm f/5.6L USM. | High Quality Material：Aluminum alloy construction, anti-rust and lightweight, durable to use. | Easy to install ：Easy to install with a fixing screw stud and convenient to use.

☂【Easy Operation】The maximum opening is 110mm, with a double head design and a flat end, which is convenient to use. Three rows of holes can achieve the purpose of extending the tool deep into the lens barrel and fixing it with four round head screws. | ☂【High quality materials】This Camera Spanner is made of qualified stainless steel, solid and firm, after grinding and polishing treatment, the surface is smooth without burr. | ☂【hex screw and hex wrench】 Comes with 2 hex screw and a hex wrench, it can be used to replace two inner hex screws, use them to tighten the spanner opening tool. | ☂【Ideal Photography accessories】Arc design, anti-slip and more firmly lock the screw hole, not easy to damage the lens. Great accessory for DSLR camera lens. | ☂【Our Commitment】Our goal is to provide high-quality products and pre-sales and after-sales services. If you have any questions about our Camera Spanner, please feel free to contact us, we will reply you as soon as possible.

Durable material：The Focus annulus Belt is made of high-quality aluminum alloy, which can withstand strict rotation and adjustment without breaking easily. You can use it for a long time. | Easy to install and remove：The Focus annulus Belt is easy to install, so don’t worry about not knowing how to use it. | Unrsal：The outer diameter of the gear annulus is designed to be large, which can be used with most follow-up focusing syst and is suitable for most cameras and camcorders. | Adjustability：Each focusing annulus is adjustable, suitable for 49mm, 52mm, 55mm, 58mm, 62mm, 67mm, 72mm, 77mm, 82mm lenses, and its built-in stainless steel screws meet global standard sizes.

Reflect material：The inside wall of the box is made of reflect material, so that the amount of light of the flash lamp can be fully utilized and the light is softer. | Exposure increase：After using, exposure needs to increase 1-2 gears appropriately. | Super light weight：Super light weight, easy to carry and use. | Can be used with flash lights of all sizes：The closure is elastic and can be used with flash lights of all sizes.