What’s the best camera for around $2000? This price point gives you access to some of the most all-round capable cameras available. Excellent image quality, powerful autofocus and great looking video are the least you can expect. We've picked the models that really stand out.

They may both be correct - each of theses sensor 'sizes' are actually sensor 'types': they are simple the nearest classification that a particular sensor falls into.

The objective lens system has individually labeled lenses, often 10x, 40x and 100x. The eyepiece lens is typically 10x. Magnification is simply making an object appear larger by in effect reducing the distance between your eyes and the specimen to a degree that would be impossible without the systematic manipulation of light waves.

The total magnification for a given viewing is found by multiplying the objective lens magnification by the eyepiece magnification. For example, a specimen viewed using a combination of 40x and 10x would appear 400 times larger than it would if you looked at it from the same distance using your eyes alone; clearly, this can be the difference between seeing something in considerable detail and not being able to see even a tiny dot.

Our goal is to make science relevant and fun for everyone. Whether you need help solving quadratic equations, inspiration for the upcoming science fair or the latest update on a major storm, Sciencing is here to help.

The working distance of a microscope, defined as the distance between the objective lens and the specimen, is controlled by moving the stage up and down. There are usually two knobs for this, one that moves the stage up and down in tiny increments (fine focus) and another than moves it in greater increments (coarse focus).

We don't usually test a product for ten years before reviewing it, but after a decade of using the Lowepro Photo Sport 300 AW II on an almost daily basis, Managing Editor Dale Baskin tells us why he loves this pack.

What's the best camera for travel? Good travel cameras should be small, versatile, and offer good image quality. In this buying guide we've rounded-up several great cameras for travel and recommended the best.

A faster sensor, improved autofocus and video see Nikon's third-gen mid-range full-framer go toe-to-toe against Canon's EOS R6 II and the Sony a7 IV. We feel its all-round ability lifts it to the top of the pile.

It is also possible to control the amount of light passing upward through the specimen area by using the diaphragm, which makes the circular opening transmitting light larger or smaller.

The new Fujifilm X-M5 has sparked renewed interest in Fujifilm’s other compact X-series cameras. We couldn’t help but wonder if a new X-E camera might be on the horizon, and if so, what it might be like.

Table keywords: "Type" refers to the commonly used type designation for sensors, "Aspect Ratio" refers to the ratio of width to height, "Dia." refers to the diameter of the tube size (this is simply the type covertered to millimeters), "Diagonal / Width / Height" are the dimensions of the sensors image producing area.

Compound microscopes get their name from the fact that they have two lens systems. The objective lens system normally has multiple magnification options, each of which is positioned over the specimen by rotating a dial, while the other system is called the eyepiece or optical lens. Usually there is only one of these.

I'm Back and Yashica launch a digital film module as a full product, nearly a quarter of a century after Silicon Film failed.

If you want a compact camera that produces great quality photos without the hassle of changing lenses, there are plenty of choices available for every budget. Read on to find out which portable enthusiast compacts are our favorites.

Kevin Beck holds a bachelor's degree in physics with minors in math and chemistry from the University of Vermont. Formerly with ScienceBlogs.com and the editor of "Run Strong," he has written for Runner's World, Men's Fitness, Competitor, and a variety of other publications. More about Kevin and links to his professional work can be found at www.kemibe.com.

When the manufacturers say they've created a camera for 'creators' or vloggers, that doesn't mean they've turned their back on photographers.

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This designation has clearly stuck (although it should have been thrown out long ago). There appears to be no specific mathematical relationship between the diameter of the imaging circle and the sensor size, although it is always roughly two thirds. Each 'Type' represents a class of sensor around these dimensions, rather than specifying an exact size.

The RF 24mm F1.4 L VCM and RF 50mm F1.4 L VCM are part of Canon's new 'hybrid' series of lenses designed to work with both EOS and Cinema EOS cameras.

The 'Type' designation given to today's CCD sensors is that it harks back to a set of standard sizes given to TV camera tubes in the 50's. These sizes were typically 1/2", 2/3" etc. The size designation does not define the diagonal of the sensor area but rather the outer diameter of the long glass envelope of the tube. Engineers soon discovered that for various reasons the usable area of this imaging plane was approximately two thirds of the designated size.

Working distance and magnification are inversely related. This means that as you increase the magnification, you have to move the lens closer to the specimen to achieve an optimal image.

The theme for our November Editors' photo challenge is 'Fog'. Show us your favorite fog photos for a chance to be featured in our winners' gallery later this month. This challenge is open to photos taken at any time.

What’s the best camera for around $1500? These midrange cameras should have capable autofocus systems, lots of direct controls and the latest sensors offering great image quality. We recommend our favorite options.

The primary job of a microscope is to produce magnification of a specimen or other object. This means interposing a number of instruments between the specimen to be examined and your own eyes, chiefly lenses (usually more than one). Also important is the distance between the specimen and the first lens the light waves reflected from the specimen encounter, known as the working distance.

Adobe's continued working on its Content Credentials system. We sat down with the head of the initiative to discuss new developments and its future.

We regularly receive emails from readers confused as to the actual size of sensor used in digital cameras. Sensors (CCD / CMOS) are often refered to with an imperial fraction designation such as 1/1.8" or 2/3", this measurement actually originates back in the 1950's and the time of Vidicon tubes. Those who find the specification sheets for these sensors are then even more confused about the relationship between the fraction and the actual diagonal size of the sensor. Below you'll find an explanation and a table of common sensor sizes. We'll be adding this information to our glossary for future reference.

Recently, a discussion in the DPReview forums posed the question: "What have you learned that you would tell beginners?" We thought we'd share what your fellow readers had to say, along with some insight from our editors.

Canon has announced the latest lens in its EOS VR System. It's intended to be an affordable way for social media content creators to experiment with new media formats.

Above $2500 cameras tend to become increasingly specialized, making it difficult to select a 'best' option. We case our eye over the options costing more than $2500 but less than $4000, to find the best all-rounder.

What's the best camera for travel? Good travel cameras should be small, versatile, and offer good image quality. In this buying guide we've rounded-up several great cameras for travel and recommended the best.

Could you please tell me the dimensions of a 1/4'' sensor?? I have found two different versions: 3.2 x 2.4 and 3.6 x 2.7. Which one is the correct??Thank you.

Can someone explain how fractions and decimals got mixed into the same “number” (eg. 1/2.3) ?Even when the reference of TV tubes was valid, this would be strange!

This discussion describes light microscopes, as most modern microscopes are equipped with their own light source. The specimen usually sits in a translucent (light-transmitting) side on a level stage. The distance between the stage and the objective lens is controlled by a rotating knob that allows exquisite focus of a properly prepared specimen.

US travel/adventure brand Aether Apparel has made a photographer-friendly waxed field jacket in conjunction with Leica. Is that something we need?

Canon's newest, non-extending 70-200mm F2.8 L zoom for RF-mount includes features aimed at both photo and video shooters. It also works with Canon's RF-mount 1.4x and 2x teleconverters.

When you first use a microscope, it's a good idea to experiment with the controls other than the lenses, which can quickly captivate your attention thanks to the wonders they often reveal. In particular, try to avoid pressing the objective lens into the specimen itself and damaging or destroying it.

Microscopes have been around in some form for centuries. The human urge to explore what the unaided eye alone cannot has led to innovations such as telescopes, microscopes and infrared ("night vision") optical equipment, and the storehouse of science knowledge to which you now have access is a remarkable reward.

The International Photography Hall of Fame and Museum has announced its 2024 class of inductees, a group that includes photographers, visionaries and historians.

Thus at lower levels of magnification, the ideal working distance is comparatively long. As you increase the magnification, the working distance decreases very rapidly. Oil-immersion lenses, which are often used for 100x objective lenses, are very, very close the specimen when optimal focus is achieved. As noted above, this can lead to accidental damage to the specimen and a possible compromise of your work. So, be patient while enjoying the benefits of an astonishing yet simple piece of science equipment!

The comapny's bringing its latest chips to some of its most popular computers, and making its nano-texture display available on a laptop.

We caught up with a few product managers and engineers at Adobe Max, and talked with them about the new features in the company's photo editing suite.