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Tips to clean and maintain your camera lens

6th January 2022
"The cleanliness of your camera lens affects the quality of your images."

The cleanliness of your camera lens affects the quality of your images and it’s always best to carry cleaning equipment in your camera bag because you never know when you’ll need it.

Here’s the simple and safest way to get your lenses clean, so that you can spend more time making photographs, and less time on cleaning chores:

Use Lens Caps

Always use lens caps on both the front and rear when the lens isn’t mounted on the camera body.

Leaving the optical elements exposed may lead to scratches on the glass part of the lens. Immediately screw the lens caps on both ends after use.

Likewise, it’s always a good idea to carry an extra lens cap to protect the front element of your lens.

Avoid Humidity and Moisture

It’s always a good idea to store your camera gear somewhere where it can air out while you’re not using it.

Minimize the exposure to rain and humid locations. A hot and humid environment builds up moisture around the lens.

Try to avoid leaving your camera zipped up in a camera bag where mold can grow, especially if you have been shooting in the rain or near water.

And do not leave your gear in direct sunlight.

Use Lens Pouch

If you travel with multiple lenses or detach your lens from the camera body, which you should do while traveling, it’s essential to keep your lenses in some sort of protective bag.

This will ensure they remain intact even if your bag takes a tumble, and it will also keep dust, dirt, and water away from your lens elements.

Avoid touching Lens glass

Never touch the glass part of the lens with your fingers.

It leaves oil stains and smudges which are difficult to remove without a microfiber cloth. Always carry several clean microfiber cloths along with the camera and lens.

Every time you use a lens, always check the glass surface for any dust, smudges, or dirt.

Most of the time you will find something on the glass that shouldn’t be there so always clean it off.

Use Lens brush to remove sand or grit

Sand and grit particles are abrasive. They may damage the lens by forming a scratch on the surface when you try to wipe it off.

Use a soft lens-cleaning brush to remove loose grit from the surface of the lens.

Point the lens down while gently brushing the lens to let gravity help you remove the dirt.

Carefully check the lens again to make sure all of the grit is gone. If not, repeat the process.

A plastic bag or its case works well to keep the brush clean.

Use a cloth or tissue

When you use liquid camera lens cleaner, make sure you wipe it off with either a microfiber lens cloth or specific lens cleaning tissues.

Do not use regular tissues as they could scratch your lens. A microfiber cloth is specially made to clean optical glass surfaces and does a great job of it.

It doesn’t leave lint on the surface. If the smudge is still present, try using a lens cleaner solution applied directly to the microfiber cloth (not the lens surface) and rub again.

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Compiled by : Delika Dangal Delika Dangal

What is difference between Infrared Thermometer and Thermal Imaging Camera

10th May 2020
"Both work on the same basic principle: sensing an object's infrared radiation and translating it into a temperature reading but that's where the similarities end."

We’ll cover how infrared thermometers work, different types of IR thermometers, their pros and cons, and usage tips. Infrared thermometers are used in different industries and work environments to determine the temperature of objects from a distance. The distance can range from an inch to miles. 

How Infrared Thermometers Works

Infrared radiation is a type of energy that is invisible to human eyes but we can feel it as heat. If you take a look at the electromagnetic spectrum, the infrared band sits just outside the range of the visible light. All objects having a higher temperature than absolute Zero emit infrared radiation. The hotter the object, the higher the frequency of the infrared radiation. Infrared temperature sensing devices detect the infrared radiation frequency and convert that into a temperature reading. Infrared radiation is one type that occurs within the electromagnetic spectrum; other types include visible light, x-rays, and microwaves.

The infrared thermometer uses a sensor called a thermopile which turns the incoming infrared radiation into heat using tiny thermocouples. The thermocouples convert that heat into an electrical signal which is measured and displayed on the screen in the form of the temperature reading. While Infrared Thermometer is a reliable and cost-effective way to get a non-contact temperature reading, it can only read the temperature for a single point. If you need a measurement for a larger area, you'll have to take multiple temperature readings.

Thermal Imaging Camera uses a focal plane array sensor. A typical Thermal Imaging sensor has pixel dimensions of 640 x 480 and each pixel acting as a sensing element, this gives you over 300k individual points on each thermal image or video. This creates a supercool thermal image from the infrared spectrum. And because of this advanced optics Thermal Imaging Cameras can detect temperature accurately for much greater distances.

Uses of Infrared Thermometers 

Infrared Thermometers are widely used by different industries such as Automotive, Food, Energy and Medical. In medical this time widely used to measure the body temperature for fever of person by a medical professional. 

How to Use an Infrared Thermometer

It's very easy; you only need to fix the batteries in their compartment and activate the desired temperature unit (Celsius or Fahrenheit).

Turn on the device by pressing the power button and aim the gun to the surface you want to measure the temperature.

Be sure to stand close to the object or within the DS ratio indicated by the manufacturer for accurate readings.

Pull the trigger to observe the reading on the digital display on the thermometer.

Types of Infrared Thermometers

Modern infrared thermometers mimic the same concept, but numerous advances in technology have introduced sophisticated devices to widen the scope of their applications. As such, detectors are designed to match specific applications to improve performance.

There are three types of infrared temperature measurement devices that are widely available today:

Infrared scanning systems: the devices scan larger areas and are used in manufacturing processes that involve conveyors, e.g., when continuous piles of objects move along a large sheet of metal from an oven.

Spot infrared thermometer: these kinds display the temperature on a particular spot on a surface., sometimes referred to as Infrared Gun.

Infrared thermal imaging cameras: these kinds use cameras to measure the temperature at different points over a larger area to create two-dimensional images called thermograms. The technology applied to the devices is more hardware and software-intensive compared to regular infrared thermometers.

Before buying Infrared Thermometers you need to know

Emissivity: It refers to the efficiency with which an object absorbs or emits infrared energy. The values range from 0.0 to 1.0. Objects that have an emissive value of 1.0 are called perfect emitters as they radiate 100% energy. An efficient infrared thermometer should factor in this feature based on the type of object in question because various surfaces emit radiation differently.

Accuracy and Speed: Effective IR thermometers deliver temperatures fast and accurately. Advanced versions factor is adjustable emissivity for more accurate readings. Experts allow a +1% margin of error when using professional IR thermometers and +2% for less expensive devices.

Temperature Range: The primary factor here is whether the thermometer is used for professional or home-based applications. For regular use, e.g., around the house, a temperature range of (-58 to 1022 degrees Fahrenheit or -50 to 550 degrees Celsius) is ideal. 

DS Ratio: The distance to spot ratio affects the accuracy of the readings from the thermometer. The rate is determined by the size of the area being measured in relation to the distance. For example, if an object has a D/S ratio of 10:1 and it is 5 inches in size, the maximum distance the thermometer can accurately measure the temperature is within 50 inches. Distances larger than that range will be inaccurate as the IR thermometer will include the temperature of the surrounding objects and surfaces.

Warranty: A warranty is a good indication of a high-quality IR thermometer. The period can range from 90 days to 5 years based on the manufacturer.

So if you just need to do some non-contact temperature spot-checking for daily use Infrared Thermometer is good but if you really want to look at the bigger picture for better temperature profile of employees and visitors for offices/corporate/factories/hotels/hospitals/restaurants then a Thermal Imaging Camera offer robust sensing imaging.

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Compiled by : Rishi Raj Singh Rishi Raj Singh

Top 4 Canon Camera in Nepal | With Specs and Price

6th September 2020
"If you are thinking what would be the best DSLR to get?"

Due to the overwhelming variety of different DSLR cameras, selecting the version that suits your budget and does have all the functionality you require could be challenging. 

What would be the best DSLR to get? That will rely on your plan, your expertise, and the shots you want! Newcomers may search for a simple-to-use, low-cost lens, professionals will need a versatile all-round camera that is professional yet in your budget, whereas professional photographers might want picture performance and quality, of course, but permanence and reliability too.  

We wanted to compile a selection of the top DSLRs to invest for you.  

Canon EOS 90D 


The Canon EOS 90D is a mid-range DSLR that succeeds a 3.5-year-old 80D and suits among the EOS 77D and the EOS 7D Mark II. The 90D is basically the DSLR replica of the mirrorless EOS M6 Mark II. 

Canon EOS 90D specs 

Image Sensor: 22.3mm x 14.8mm CMOS, 34.4 MP,  

Image processor: DIGIC 8 

Viewfinder: Pentaprism, 100% coverage 

AF System: 45 cross-type AF points 

ISO Range: Auto (100-25600), can be expanded to 51200 

Shutter Speed: 30-1/8000 sec 

Video Resolution: 4K - 3840 x 2160 (29.97, 25 fps), Full HD - 1920 x 1080 (119.88, 100, 59.94, 50, 29.97, 25 fps), HD - 1280 x 720 (59.94, 50 fps), HDR - 1920 x 1080 (29.97, 25 fps), 4K Time-lapse - 3840 x 2160 (29.97, 25 fps) 

Screen: Touch screen Vari angle 7.7cm (3.0") 3:2 Clear View II TFT, approx. 1040K dots 

Video Frame Rate: 59.94 fps 

Built-in flash: 12 ISO 100, meters 

External Flash support: Yes 

Compatible Lenses: All EF/EF-S lenses 

Weather Shield Body: Yes 

Connectivity: Wi-Fi b/g/n, Bluetooth, Type C Mini HDMI Connector, Micro USB 2.0, 3.5mm headphone jack 

Battery Type: Rechargeable Li-ion Battery LP-E6N (supplied), built-in for date & settings approx. 1300 shots 

Canon EOS 90D Price in Nepal 

The camera is priced at Rs. 214,990 


Canon EOS 5D Mark IV 


The EOS 5D Mark IV camera adds on the 5D series' powerful legacy, offering stunning adjustments in picture quality, performance, and flexibility. Canon's devotion to imagery perfection is the essence of the EOS 5D Mark IV. 

Canon EOS 5D Mark IV specs 

Image Sensor: 36 x 24 mm, 30.4MP, CMOS, Full Frame 

Image processor: DIGIC 6+ 

Top LCD: Yes 

Viewfinder: Pentaprism, 100% coverage 

AF System: 61 Cross Autofocus points 

ISO Range: 50-102400 

Shutter Speed: 1/8000 – 30 seconds 

Video Resolution: 4096 x 2160 pixels (2160p UHD 4K), 1920×1080 Pixels (1080p HD), 1280×720 Pixels (720p HD) 

Screen: 3.2-inch TFT, 1620000 dots, Fixed Screen 

Video Frame Rate: 2160p frame rate: (30fps/24fps), 1080p frame rate: (60fps/30fps/24fps), 720p frame rate: (120fps) 

Connectivity: Wi-Fi b/g/n, Bluetooth, Type C Mini HDMI Connector, Micro USB 2.0, 3.5mm headphone jack 

Built-in flash: No 

External Flash support: Yes 

Compatible Lenses: All EF lenses 

Weather Shield Body: Yes 

Connectivity: Wi-Fi b/g/n, Bluetooth, Type C Mini HDMI Connector, Micro USB 2.0, 3.5mm headphone jack 

Battery Type: Li-ion, Rechargeable; Model: LP-E6N, approx. 900 shots  

Canon EOS 5D Mark IV  Price in Nepal 

The camera is priced at Rs. 344,990 for the body only and Rs. 4,32,590 With a 24-105mm/4L IS II Kit lens. 


Canon EOS R 


The EOS R device via the RF mount gives life to a rare combination between both the sensor and the lens. At the heart of this revolutionary design is the wide 54 mm diameter adopted from the EF mount, and that the use of mirrorless technology makes a small back focus feasible. 

Canon EOS R specs 

Image Sensor: 36 x 24 mm CMOS, 32 MP,  

Image processor: DIGIC 8 

Viewfinder: 0.5-inch OLED color EVF 

AF System: With Area 88% horizontal and 100% vertical 

ISO Range: Auto, 100-40000 (expands to 50-102400) 

Shutter Speed: 30-1/8000 sec 

Video Resolution: 4K (16:9) 3840 x 2160, Full HD (16:9) 1920 x 1080, HD (16:9) 1280 x 720 

Screen: 8.01cm (3.15") Clear View LCD II, approx. 2.1million dots 

Video Frame Rate: MOV Video: HD - 1280 x 720 at 100fps or 119.9fps 

Connectivity: Wi-Fi b/g/n, Bluetooth, SuperSpeed USB 3.1 USB C connector 3.5mm headphone jack 

Built-in flash: 12 ISO 100, meters 

External Flash support: Yes 

Compatible Lenses: All EF/EF-S lenses 

Weather Shield Body: Yes 

Connectivity: Wi-Fi b/g/n, Bluetooth, SuperSpeed USB 3.1 USB C connector 3.5mm headphone jack 

Battery Type: Rechargeable Li-ion Battery LP-E6N (supplied)/LP-E6 approx. 370 shots 

Canon EOS R Price in Nepal 

The camera is priced at Rs.263,490 for the body only and Rs.413,490 for 24-105 KIT


Canon EOS-1DX II  


Each time it comes up, the new EOS-1D X Mark II camera is nothing but magnificent with a fantastic mix of ingenuity and elegance with major power and exceptional speed. The EOS-1D X Mark II, combined with excellent low-light performance owing to its strong sensor and extensible ISO array, works beautifully, easily, and astonishingly. 

Canon EOS-1DX II specs 

Image Sensor: 35.9 x 23.9 mm CMOS, 20.2 MP  

Image processor: Dual "DIGIC 6+" 

Viewfinder: Pentaprism, 100% coverage 

AF System: 61 Point / max of 41 cross-type 

ISO Range: Auto 100-51200 (in 1/3-stop or whole stop increments) 

Shutter Speed: 30-1/8000 sec 

Video Resolution:  4K (17:9) - 4096 x 2160 Full HD (16:9) - 1920 x 1080 

Screen: 8.11cm (3.2") Clear View LCD II, approx. 1620K dots 

Video Frame Rate: MOV Video: Full HD - 1920 x 1080 at 100fps or 119.9fps 

Built-in flash: E-TTL II Auto Flash, Metered Manual 

External Flash support: Yes 

Compatible Lenses: All EF lenses 

Connectivity: SuperSpeed USB 3.0 Stereo mini jack 

Battery Type: Rechargeable Li-ion Battery LP-E19 (supplied) / LP-E4N / LP-E4 approx. 1210 shots 

Canon EOS-1DX II Price in Nepal 

The camera is priced at Rs. 658,990 

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Compiled by : Upasana Poudel Upasana Poudel