I am a professional photographer and I myself use a dandelion chip on my lenses with my cameras more than 10 years! I have installed chips on more than 10,000 lenses and adapters! Only I sell with guarantee original dandelion chip for Nikon and Canon! If you bought from me and received my service, you will never buy a similar product from another seller! Only I give instructions and advice before and after the purchase! My service on Ebay is unique and the best. My store is available 24/7 for shopping. Canon programmable dandelion- chip of 4 generation. by Victor Lushnikov, made in Europe. The choice of the buyer: a set for any lenses and adapters, including Kit for Samyang / Rokinon / Walimex / Bower / Opteca / New Vivitar  lenses! Free photo and video chip installation instructions! Before making a purchase please contact the seller for telling him how you want to use a chip and what lens or adapter you want it to be installed on. Please give the following information: 1.  If you want to install the chip lens Samyang,  Rokinon, Walimex, Bower, Pro-Optic,  Prakticar,  Vivitar   - write me necessarily! The lens name,  such as Samyang 85 mm / f 1.4 2. Write the name of your camera, such as Canon 5D mark III 3.  The name of the  adapter name,  such as Nikon F- Canon EOS Lenses with wide angle - have a very long depth of field! ( 8mm, 14 mm, 20 mm, 35 mm ) To focus confirmation was more accurate - disable the chip shutter lock mode. Select the correct direction of focus: 1. Focus on one object clockwise and counterclockwise and do 2 shots! 2. Compare 2 images, select the one where the sharpness is better, always focused in this direction 3. If you see the front or back - focus adjustment make confirmation of the point (see programming instructions). This chip works on all of Canon SLR cameras, both of film and all digital Canon SLR models,  including:  Canon 6D mark II, Canon 5D mark III,  Canon 5D mark IV, 5Ds, 5DsR, 6D, 1Dx, 1Dx mark II, 650D, 700D, 750D, 70D, 80D, 100D, 200D, 7D mark II, 77D. and so on - everything! What is in the box: 1. Chip 2. Calibre for precise positioning for proper installation 3. Special shelf for installation in the adapter 4. Backing plate for installation on  Samyang, Rokinon, Bower   (on request) All customers receive a detailed photo- instruction  of the chip installation. All customers receive detailed instructions on programming the chip. Personal video clip to each chip buyer , in this video clip I show completely pre-programmed chip! See all video at my  YouTube channel  :  Andrey Kuryanov The chip has the functions: 1. Programming (the focal length and aperture are programmed into the chip). 2. The focus trap (as long as there is no exact hit in the focus - the camera shutter will not work - this is the "autofocus in manual mode") 3. The function of adjusting the confirmation point (if your lens has a back / front focus - the focus confirmation point can be shifted by +/- 17 steps 4. Stand-by function !!! (None of the Chinese EMF chip has this function). Without this function, the chip discharges the battery, even if the camera is turned off. FAQ Canon Dandelion Chip: Very important! Read carefully before buying! Write questions before buying! I give very detailed answers and tips! How does the metering What aperture will be displayed on the camera The camera shows that the diaphragm, which is programmed in the dandelion. This diaphragm is fixed and does not change during the shooting !!! Exposure is calculated according to the actual luminous flux after you close the lens aperture to the desired value at the time of shooting. It does not matter what aperture programmed dandelion. Extract all the same to count correctly. ETTL works similarly. Just put the flash and shoot. Flash energy is calculated automatically. Are firmware affect the accuracy and regimes?  This information is very important for mirrored lenses (catadioptric) Does not affect. The dandelion can be sewn F1.0 / 12mm and use, for example, with Samyang 500 mm .. However, modern ETTL flash will try to uncover the reflector in accordance with the sewn in dandelion focal length. In this case, you need to convert flash to manually enter the zoom mode. The focus sensor in cameras Canon does not respond to diaphragms that are pre-programmed to chip further than 5.6. Therefore, I pre-program in the chip for such lenses aperture: 2; or 2.8; or 4.0; or 5.6. Using the chip on wide-angle lenses and fisheye lenses! Wide-angle and fisheye lenses have a very long depth of field! Therefore, the dandelion chip can constantly confirm the focus. Only for my customers: I open access to video and photo chip installation instructions! Only for my customers - free pre-programming chip! Only for my customers - free consultation before and after purchase! Only for my customers - a complete guarantee of the chip performance! Choose the desired kit (set) in the photos in the ad and write me a personal message ATTENTION! Every customer receives a fully working chip! I pre-program each chip before sending it to the buyer! I test and check every chip before sending it to the buyer! The process of checking the chip I record on video, a personal video for each buyer! Before installing the chip, each customer can check the chip on his camera! How to check the chip - I show in the personal video for each buyer! Video for every customer is a unique proof of the chip's working capacity ! If after installing the chip on your lens - the camera does not show the aperture, it means only one: you made a mistake when installing the chip! Even a mistake of 0.1 mm when installing the chip - will be critical! If you make a mistake when installing the chip and the camera does not see the chip - it's your mistake ! Do not need to write to me, that: "the chip does not work"! Your mistake is only your mistake! This chip works on all of Canon SLR cameras, both of film and all digital Canon SLR models,  including:     Canon 5D mark IV,  Canon 5D mark III,  5Ds, 5DsR, 6D, 1Dx, 1Dx mark II, 650D, 700D, 750D, 70D, 80D, 100D, 200D, 77D  and so on - everything! I do images of the chip packaging process to every buyer! See video:  The process of packaging chips and adapters before shipments to buyers. Прежде, чем Вы сделаете заказ и оплатите его, напишите мне в личном сообщении: 1. Название адаптера или переходника, на который будет устанавливаться чип-одуванчик, например: переходник Nikon F-Canon EOS  2. Название камеры, на которой Вы будете использовать чип-одуванчик 3. Если Вы хотите установить одуванчик на объективы  Samyang, Rokinon, Bower, обязательно напишите мне об этом, поскольку для установки одуванчика на эти объективы я вкладываю в комплект специальную полочку-подкладку, без которой наклеить правильно невозможно! Все покупатели получают подробную инструкцию по программированию чипа в письменном виде. Так-же я предоставляю видео-инструкцию по программированию одуванчика. PROGRAMMABLE CHIP SPECIFICATIONS A new series of Dandelions for digital and film cameras Canon EOS. Since the autumn of 2008 an updated Dandelion is being produced. The case is made of specially hard plastic, for better slip. And the contact areas are covered with a solid layer of gold. The new series received an important function - the programming function. Those. you can independently change the "stitched" in the Dandelion value of the aperture and focal length. And also the most important adjustment function, which allows you to cope with the problems of accuracy of confirmation of focus. The new Dandelion does not use the MF mode, as it was before. Now the focus logic works in AF (autofocus) mode. First, it increases the accuracy of focusing. Secondly, it allows you to adjust the Dandelion to different instances of lenses. Third - the audio confirmation now works on all cameras. For example, on a film EOS 3000N. The sensitivity of the focus sensors in this mode is an order of magnitude higher. There was also one more feature - "hard" locking of the descent to the confirmation signal. If you hold the shutter button all the way down, the picture will be taken instantly at the exact focus signal. This allows you to shoot dynamic stories. And of course the main advantage of the new series is the ability to change the parameters of the Dandelion independently, without removing it from the camera. Parameters of Dandelion

Attention buyers from the USA! Delivery times from Ukraine to the USA are only 10-12 business days! I accept orders 24/7 I am a professional photographer and I myself use a dandelion chip on my lenses with my cameras more than 10 years! 
I have installed chips on more than 10,000 lenses and adapters! 
Only I sell with guarantee original dandelion chip for Nikon and Canon! 
If you bought from me and received my service, you will never buy a similar product from another seller! 
Only I give instructions and advice before and after the purchase! 
My service on Ebay is unique and the best. 
My store is available 24/7 for shopping. 
 Dandelion Chip Functionality: 
 1. Nikon camera immediately sees this lens as autofocus lens, without additional settings in the camera menu. 
2. Focus trap - until there is an exact focus, the shutter will not work (this function can be turned off). 
3. Full control of the diaphragm of the manual lens from the camera, if the manual lens has diaphragm control lever. 
4. Confirmation of focusing with light and sound at the selected point. 
5. You can choose any focus point, as with an autofocus lens. 
6. On younger Nikon cameras there will be correct metering (on older Nikon models, metering is by default). 
7. The flash will work in all automatic modes. 8. Record in EXIF all of the image parameters, as when working with an autofocus lens. 
 The Shipping cost price is constant and independent of quantity of purchased dandelion-chips! 
 ATTENTION. Before you make a purchase, send me a message ( text message for example ) " I want to buy chip for the lens: Nikkor 50mm / f 1.4-16, my camera Nikon D750 " Wait for my answer and only after that make a purchase! I answer very quickly at any time of the day or night. Если Вы говорите или понимаете по-русски - можно писать все вопросы на русском/украинском языках. AF Chip "Dandelion" for Nikon Compatibility: 1. There are only 4 film cameras that Dandelion is not compatible with: F4, F60, F90x, F801/S. It works with all other models perfectly. 1.1 . "F60" Function - works on Nikon models with a diaphragm reading mechanism. 1.2. Full compatibility and excellent work with Nikon Z6 / Z7 cameras via Nikon F - Nikon Z ( FTZ ) adapter. 1.3. Programming mode is not compatible with F5 and D1X/H models, but I am sending a fully pre-programmed chip 2 . Dandelion chip can not be installed only on lenses with aperture of 1.2. 3. I pre-program each chip for each of my customers. 4. I give instructions for installing the chip 5. I make consultations for every customer before and after purchase. 6. I make a personal video about each programmed chip for each of my customers. 7. You are guaranteed to get a fully working and pre-programmed chip! ATTENTION-2.   The chip is very fragile! In the case of improper use of the product by the buyer and mechanical damage to the chip, the buyer cannot claim the seller. If you made an attempt to install the chip and failed - RETURN IMPOSSIBLE. Dandelion Specification: Dandelion is designed to be mounted on adapter rings and manual lenses, which can then be used on Nikon AF digital and film cameras. Due to the size, commensurate with the match, Dandelion can be installed on any ring and any lens with a Nikon F bayonet that exist in the world. Lenses with such a bayonet have been produced since 1959. Dandelion can not be installed only on lenses with aperture of 1.2. 
If Dandelion is installed on the ring, the camera gets the function of metering. If your camera has a 3D matrix metering, it will also work. 
Accurate focus will be confirmed by sound and light signal. And the screen will highlight the points that fall into the focus area. On digital cameras younger series of sound confirmation. 
If you install Dandelion on a lens that is equipped with an AI-S type automatic aperture, the aperture on the lens will be controlled from the camera in the same way as autofocus lenses. 
There is another feature - the "focus trap". If you hold the shutter button all the way down, the snapshot will be taken instantly at the exact focus signal. This allows you to shoot dynamic scenes. 
Dandelion Compatibility: Dandelion does not work only on four film cameras: F4, F60, F601, F801 and F90x. It works perfectly for everyone else. Programming mode does not work on only two cameras: F5 and D1X /H. 
 What's in the package: 1. Dandelion chip original (fully pre-programmed and ready to install) 2. Special shelf-corner (for installing the chip on some adapters and some lenses) 3. Caliber for precise chip installation P.S. Programming and installation instructions - in electronic form, in personal correspondence. Variable Dandelion parameters: Diaphragm (Aperture ):  from F1.0 to F90 Focal length :  from 5 mm to 2000 mm ( selected from the table ) Focus mode: AF / MF Adjust the focus confirmation point: 17 steps