---
product_id: 47960526
title: "Lens Focus Calibration Tool Alignment Ruler Folding Card (pack of 2)"
brand: "dslrkit"
price: "€ 12.21"
currency: EUR
in_stock: true
reviews_count: 13
category: "Dslrkit"
url: https://www.desertcart.com.cy/products/47960526-lens-focus-calibration-tool-alignment-ruler-folding-card-pack-2
store_origin: CY
region: Cyprus
---

# Spot-on AF calibration Precision 19x12.3cm ruler Compatible with Nikon, Canon & Sony AF tuning Lens Focus Calibration Tool Alignment Ruler Folding Card (pack of 2)

**Brand:** dslrkit
**Price:** € 12.21
**Availability:** ✅ In Stock

## Summary

> 🎯 Nail your focus, never miss the shot!

## Quick Answers

- **What is this?** Lens Focus Calibration Tool Alignment Ruler Folding Card (pack of 2) by dslrkit
- **How much does it cost?** € 12.21 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/47960526-lens-focus-calibration-tool-alignment-ruler-folding-card-pack-2)

## 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

- • **Double the Value 🔄:** Pack of 2 calibration rulers means you always have a backup or can share with your photography crew.
- • **Pinpoint Your Focus 🎯:** Calibrate your lens for razor-sharp images every time, especially with shallow depth of field shots.
- • **Universal Compatibility 🌐:** Works seamlessly with Nikon AF Fine Tune, Canon & Sony AF Micro Adjustment systems.
- • **Compact & Portable Design 📏:** Folding card size fits easily in your camera bag for on-the-go calibration.
- • **Maximize Lens Performance 🚀:** Eliminate front or back focusing errors to unlock your lens’s true potential and impress your clients or followers.

## Overview

This Lens Focus Calibration Tool is a compact, folding ruler (19x12.3cm) designed to help photographers precisely calibrate their camera lenses’ autofocus accuracy. Compatible with Nikon, Canon, and Sony AF fine-tuning features, it enables quick detection and correction of front or back focusing issues, ensuring sharp images especially when shooting with shallow depth of field. Sold in a convenient pack of two, it’s an essential accessory for professionals and enthusiasts aiming for flawless focus every time.

## 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:19*12.3cm 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: Awesome value - I used this to calibrate a new Sigma Art lens in conjunction with the Sigma USB Dock Mount for Canon Lens . Worked brilliantly. Was tempted to knock off one star for lack of instructions (I didn't because of the superb value). It depends what your set-up is (camera make?, dock options?) but just covering the basic principles would be useful. The QR code in the middle does take you to their website where there are basic instructions: it would be easy enough to include a copy of those. Lots of good info online though. When calibrating: measure and align carefully. Do be careful that the vertical centre-piece _is_ actually vertical before shooting! Do use a tripod, mirror lock-up and delayed or remote release. For example at 40cm with a full-frame sensor and 50mm lens at f1.4 the dof is less than 5mm ... the more accurate and stable your set-up the easier the process is and the more reliable the results. Make use of green and purple chromatic aberrations that will appear in the side markings in your shots! All they need to do now is make a 'big brother' for longer focussing distances and wider lenses. At 10m with full-frame 50mm lens the vertical bit in the middle can just about be hit by my 5D spot meter, but a bigger version is needed for this focal length and for wide angle lenses.
Review: Trouble with assembly but great product - Struggled with this and it's a little frustrating that it didn't come flat. So when I put it together it wasn't level and being thin cardboard you can't correct it. Made the focusing troublesome bit got through it. Turns out my lens was out and since using a part of this, my focusing is better.

## 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:19*12.3cm
- Package Included: Lens Focus Calibration Card X 2

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B012F8G1DO |
| Aperture Modes | F9.3, F5.6 |
| Best Sellers Rank | 43,029 in DIY & Tools ( See Top 100 in DIY & Tools ) 25 in Woodworking Project Kits |
| Brand | DSLRKIT |
| Camera Lens | Focus calibration tool for camera lenses |
| Colour | white |
| Customer Reviews | 4.1 4.1 out of 5 stars (2,897) |
| Date First Available | 19 Oct. 2015 |
| Focus type | Auto Focus |
| Guaranteed software updates until | unknown |
| Item Weight | 0.01 Ounces |
| Item model number | LFCT2 |
| Lens Design | Prime |
| Lens Fixed Focal Length | 190 Millimetres |
| Min Focal Length | 190 Millimeters |
| Package Dimensions L x W x H | 18.9 x 12.1 x 1.3 centimetres |
| Package Weight | 0.04 Kilograms |
| Part number | LFCT2 |
| Product Dimensions L x W x H | 20.3 x 15 x 1 centimetres |
| Style | Compact |
| Water Resistance Level | Water Repellent |
| Zoom Type | prime |

## Product Details

- **Brand:** DSLRKIT
- **Camera lens description:** Focus calibration tool for camera lenses
- **Compatible mountings:** Canon EF, Nikon F, Sony E
- **Focal length description:** 190.0 millimeters
- **Focus type:** Auto Focus
- **Lens design:** Prime
- **Lens type:** Standard
- **Lens-fixed focal length:** 190 Millimetres
- **Minimum focal length:** 190 Millimeters
- **Zoom ratio:** 1

## Images

![Lens Focus Calibration Tool Alignment Ruler Folding Card (pack of 2) - Image 1](https://m.media-amazon.com/images/I/813gxKL2P6L.jpg)
![Lens Focus Calibration Tool Alignment Ruler Folding Card (pack of 2) - Image 2](https://m.media-amazon.com/images/I/71MkcAeltPL.jpg)
![Lens Focus Calibration Tool Alignment Ruler Folding Card (pack of 2) - Image 3](https://m.media-amazon.com/images/I/718l67U9+mL.jpg)
![Lens Focus Calibration Tool Alignment Ruler Folding Card (pack of 2) - Image 4](https://m.media-amazon.com/images/I/81imL5XqfpL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Awesome value
*by S***Y on 27 November 2016*

I used this to calibrate a new Sigma Art lens in conjunction with the Sigma USB Dock Mount for Canon Lens . Worked brilliantly. Was tempted to knock off one star for lack of instructions (I didn't because of the superb value). It depends what your set-up is (camera make?, dock options?) but just covering the basic principles would be useful. The QR code in the middle does take you to their website where there are basic instructions: it would be easy enough to include a copy of those. Lots of good info online though. When calibrating: measure and align carefully. Do be careful that the vertical centre-piece _is_ actually vertical before shooting! Do use a tripod, mirror lock-up and delayed or remote release. For example at 40cm with a full-frame sensor and 50mm lens at f1.4 the dof is less than 5mm ... the more accurate and stable your set-up the easier the process is and the more reliable the results. Make use of green and purple chromatic aberrations that will appear in the side markings in your shots! All they need to do now is make a 'big brother' for longer focussing distances and wider lenses. At 10m with full-frame 50mm lens the vertical bit in the middle can just about be hit by my 5D spot meter, but a bigger version is needed for this focal length and for wide angle lenses.

### ⭐⭐⭐⭐ Trouble with assembly but great product
*by M***K on 29 June 2020*

Struggled with this and it's a little frustrating that it didn't come flat. So when I put it together it wasn't level and being thin cardboard you can't correct it. Made the focusing troublesome bit got through it. Turns out my lens was out and since using a part of this, my focusing is better.

### ⭐⭐⭐⭐⭐ Simple but effective.
*by T***I on 30 June 2025*

Great simple kit to calibrate the focus point. Easy to use after checking out a few YouTube tutorial vids.

## Frequently Bought Together

- DSLRKIT Lens Focus Calibration Tool Alignment Ruler Folding Card(Pack of 2)
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*Product available on Desertcart Cyprus*
*Store origin: CY*
*Last updated: 2026-03-02*