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No hay artículos en el carroInstruction This compact ruler allows you to determine if your lens is auto-focusing accurately as it should. It is an essential tool that is particularly useful when shooting with a shallow depth of field, where focusing should ideally be "spot on". You can use this ruler to determine how "off" the focusing is for a particular camera / lens combination and, on supported cameras, adjust the camera's auto-focus settings to resolve this. On Nikon cameras, this feature is known as "AF Fine Tune". On Canon and Sony cameras, it's known as "AF Micro Adjustment". Please refer to your camera's instructions manual to see if this feature is present. Size:19*12.3cm Package Included: Lens Focus Calibration Card X6 Usage 1. Set up the ruler. 2. Ensure both the camera and ruler are level, exactly perpendicular and at the same height. It is best to mount the camera on a tripod to do this. 3. Set the lens to the widest aperture to obtain the shallowest depth of field. This will make it easier to determine if your lens is focusing accurately. Auto-focus on the crosshair at the center of the ruler, then take a photo. 4. Inspect the photo to see if focusing is accurate. It is recommended that you do this on a computer since you will be able to see better on a bigger screen. If focusing is accurate, the '0' on the ruler should be the sharpest point on the image and the other numbers get blurrier as you move away from the 0. 5. If any number above the 0 is clearer, then your lens is backfocusing. Otherwise, if any number below the 0 is clearer, then your lens is front focusing. In either case, you would have to set the auto-focus micro-adjustment parameters on your camera body until you are able to obtain a picture that is sharpest at the '0' on the ruler.
G D
Comentado en el Reino Unido el 19 de enero de 2024
Works absolutely perfect for the micro adjustments on my old DSLR’s. Also tried it with my mirrorless just out of curiosity to check they really don’t need adjustment (they don’t, it was spot on the money!).
Stéphanie Côté
Comentado en Canadá el 7 de marzo de 2021
Produit d'excellente qualité et livraison rapide! Je recommande!
Cliente
Comentado en Italia el 15 de diciembre de 2020
Buono e funzionale
Compass
Comentado en los Estados Unidos el 9 de enero de 2017
Dirt cheap but perfectly functional. Allowed me to get my 24-70 and 70-200 dialed in and cured for separate back and front focusing issues at close up and further zooms. Also allowed me to demonstrate just how prone to purple fringing my 85mm F1.2 is.How to use: Set your camera and lens up with the lens set to its widest aperture. If it's a zoom, set it first to widest angle (for a 70-200, this would be at 70mm), and snap a pic focusing on the central, vertical target card with the circles and QR code on it. Take that photo into your editing software and look at the checker stripe pattern that goes up the longest face of the triangular shape. Look to see where on that scale the image is best in focus. On my sample image, which is for a Canon F1.8 mk II at 50mm, you can see that it is in focus around the Zero mark, which means this lens does not need any microadjustment as there is no back or front focusing going on. If this is not the case and it seems to be in focus in front or behind the zero point, take a guess at the amount of adjustment needed, take another snap with the camera, re-import and see what has changed. If your lens is now further out of focus, make your change back the other way, and rinse and repeat. If you are adjusting a zoom lens, once you have the widest angle calibrated, zoom all the way and make adjustments for that setting.Can't go wrong for the price, plus you get a handful of them for the price, so you don't have to worry too much about how you treat them.
Vegux
Comentado en Francia el 29 de abril de 2016
RAS ! Simple à mettre en œuvre, bien pensé, m'a permis de régler un problème de front focus sur un 50mm f1.4 monté sur un 7D Mark II en 5 minutes.
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