--- product_id: 65491075 title: "28X18cm Lens Focus Calibration Tool Alignment Ruler Folding Card (Pack of 2)" brand: "dslrkit" price: "72 zł" currency: PLN in_stock: true reviews_count: 13 category: "Dslrkit" url: https://www.desertcart.pl/products/65491075-28x18cm-lens-focus-calibration-tool-alignment-ruler-folding-card-pack store_origin: PL region: Poland --- # 28x18cm precision size Accurate AF calibration Dual-pack for double value 28X18cm Lens Focus Calibration Tool Alignment Ruler Folding Card (Pack of 2) **Brand:** dslrkit **Price:** 72 zł **Availability:** ✅ In Stock ## Summary > 📸 Nail your focus or miss the shot—calibrate like a pro every time! ## Quick Answers - **What is this?** 28X18cm Lens Focus Calibration Tool Alignment Ruler Folding Card (Pack of 2) by dslrkit - **How much does it cost?** 72 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/65491075-28x18cm-lens-focus-calibration-tool-alignment-ruler-folding-card-pack) ## Best For - dslrkit enthusiasts ## Why This Product - Trusted dslrkit brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Value Pack of Two:** Double the tools, double the confidence—calibrate multiple lenses or share with a fellow pro. - • **Compact & Portable:** 28x18cm folding ruler fits easily in your camera bag for on-the-go calibration. - • **Pinpoint Focus Accuracy:** Calibrate your lens to perfection with precise AF micro-adjustments. - • **Universal Compatibility:** Supports Nikon AF Fine Tune, Canon & Sony AF Micro Adjustment. - • **Shallow Depth of Field Mastery:** Ensure razor-sharp focus even in the trickiest bokeh shots. ## Overview The DSLRKIT Lens Focus Calibration Tool is a compact, 28x18cm folding ruler designed to help photographers precisely calibrate their camera lenses' autofocus. Compatible with Nikon, Canon, and Sony AF micro-adjustment features, this dual-pack tool ensures your shots are perfectly sharp, especially when working with shallow depth of field. Lightweight and portable, it’s an essential accessory for any serious photographer aiming to eliminate focus errors and elevate image quality. ## Description Instruction 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:28.1*18cm Package Included: Lens Focus Calibration Card X2 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 QR-Code 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. Review: Works well, money saver. - Assembly was simple and works fine as a calibration tool. For the average person who only has a couple of cameras/lens kits, this tool should meet your needs and save you a bunch of money (especially considering the fact that you get two in the package). Review: Great - This worker great!! Easy to set up and easy to use. Fixed one that was way out of adjustment and proved the others were right on. ## Features - 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:28.1*18cm - Package Included: Lens Focus Calibration Card X 2 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07B5ZHF2P | | Best Sellers Rank | #251 in Digital Camera Accessory Kits | | Brand Name | DSLRKIT | | Customer Reviews | 4.3 4.3 out of 5 stars (157) | | Item Dimensions L x W | 11.06"L x 7.09"W | | Item Weight | 0.15 Pounds | | Manufacturer | DSLRKIT | | Model | LFCT2-L | | Part Number | LFCT2-L | ## Images ![28X18cm Lens Focus Calibration Tool Alignment Ruler Folding Card (Pack of 2) - Image 1](https://m.media-amazon.com/images/I/71CFDKSpd4L.jpg) ## Questions & Answers **Q: How far away should the lens be away from the card?** A: It really depends on the focal length of the lens. You want to try to fill the frame as much as possible with a photo of the card. **Q: What do you focus on to calibrate your lens?** A: Focus on the center target. The plane at which the side graphics are sharp will indicate front or back focus, relative to the center target. Suggest that you look at Youtube videos specific to autofocus calibration - a wealth of information there! ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works well, money saver. *by E***N on August 12, 2025* Assembly was simple and works fine as a calibration tool. For the average person who only has a couple of cameras/lens kits, this tool should meet your needs and save you a bunch of money (especially considering the fact that you get two in the package). ### ⭐⭐⭐⭐⭐ Great *by P***N on February 5, 2026* This worker great!! Easy to set up and easy to use. Fixed one that was way out of adjustment and proved the others were right on. ### ⭐⭐⭐⭐ Effective at a low price! *by A***R on February 13, 2020* Easy to use, and it got the job done. The only thing that would improve it would be a better defined focus point when testing your lens. ## Frequently Bought Together - DSLRKIT 28X18cm Lens Focus Calibration Tool Alignment Ruler Folding Card (pack of 2) - SanDisk 128GB Extreme PRO SDXC card, SD Card, V30 Memory Card, 4K UHD, up to 200 MB/s, SanDisk QuickFlow Technology, RescuePro Deluxe Data Recovery Software, UHS-I, Class 10, U3, V30 - Tamron Tap-In Console for Nikon Lenses - Black --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pl/products/65491075-28x18cm-lens-focus-calibration-tool-alignment-ruler-folding-card-pack](https://www.desertcart.pl/products/65491075-28x18cm-lens-focus-calibration-tool-alignment-ruler-folding-card-pack) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-05-03*