Tag Archives: megapixels

Concerning Megapixels

(This is another in a series of articles based on posts I shared elsewhere. This one is based on a reply to a post concerning how important it is to move to a newer, improved sensor with higher photo site density. The immediate question had to do with how often the improvements would be significant enough to be seen, and the writer had correctly pointed out that there can be advantages to higher “MP count” when making very large, high quality prints.)

It is useful to try for a realistic understanding of how and when a higher MP sensor may show its advantages. This post tries to not take a position on brands and models, but rather to lay out a comparison of some relevant technical stuff — from which we can all draw our own individual conclusions.

There is a point below which you would be hard pressed to tell the difference between prints made from 22MP and 36MP cameras and above which you might be able to.(1) For example, virtually everyone would agree that the difference is typically completely invisible in small web images, and virtually everyone would agree that it could be visible if you closely inspect a print that is six feet wide. Since we could debate just where the boundary is — and, frankly, it is somewhat subjective — you could pick any point on the print size scale that you want and the principles will be the same.

Some Comparisons

Just for fun, let me use completely arbitrarily use two print sizes and base the comparisons on the 22MP Canon 5D Mark III and the Sony/Canon 36MP sensor cameras. Continue reading Concerning Megapixels

Canon EOS 5D Mark II Body Under $2000

I just received a note from B&H saying that the Canon EOS 5D Mark II body is available right now for $1999.95. The 5D2 (as I prefer to call it – less typing!) is Canon’s 21 MP full frame DSLR that also can produce excellent HD video. This is the camera that I use for my own photography.

UPDATE: This price includes a “bundle” of other useful items, too:

SanDisk 16GB Extreme Pro CompactFlash Card
Lowepro Adventura 170 Shoulder Bag
Red Giant B&H Video Production Software Bundle

The body-only deal is a great opportunity for those who are looking to upgrade from another body and may already have a set of Canon lenses. If you don’t have lenses, two great ones to combine with this camera are the Canon Zoom Wide Angle-Telephoto EF 24-70mm f/2.8L or the Canon 24-105mm f/4L IS USM. (I use the 24-105, though I know others who love the 24-70, and it is eligible for the current Canon ‘Instant Rebate’ Promotion on lenses and Speedlites.)

G Dan Mitchell is a California photographer whose subjects include the Pacific coast, redwood forests, central California oak/grasslands, the Sierra Nevada, California deserts, urban landscapes, night photography, and more.
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Text, photographs, and other media are © Copyright G Dan Mitchell (or others when indicated) and are not in the public domain and may not be used on websites, blogs, or in other media without advance permission from G Dan Mitchell.

Myth: Diffraction and Motion Blur Worsen With More Megapixels

They don’t.

Another post that I wrote just before this one (“Why Your 21MP File “Looks Softer” Than Your 12MP File at 100%“) explains why pixel-peeping* photographers might imagine that cameras with greater photosite density (e.g. – “more megapixels”) might produce “softer” photographs, based on what they observe when they compare 100% magnification images on the screen. These cameras do not produce softer images – the results will either be equal to or better than those from lower photosite density cameras in this regard. You can follow the link to read the original post.

A reader wrote and suggested that perhaps the images from the camera with greater photosite density really are softer, but the cause is a greater susceptibility to diffraction blur or motion blur.

No. Neither is the case.

These are two additional misconceptions that can be fed by (yet again!) pondering 100% magnification crops on the screen without thinking through the actual (non-) effect of what you see there when it comes to actual photographs. Continue reading Myth: Diffraction and Motion Blur Worsen With More Megapixels

In Praise of the Canon 5D II, and Why I’ll Wait a Bit Longer

I’ve used the Canon 5D for the past few years, and it is a very fine camera for most types of photography and an excellent camera for my photographic purposes. I find the advantages of the full frame sensor to be compelling: potentially higher image resolution, a greater range of useful apertures, the ability to shoot at smaller apertures than on cropped sensor cameras, and so forth. Any criticisms of the camera that I might have are truly minor. (A mirror lockup button would be nice… ;-) Other photographers have agreed, and the 5D has probably been the most popular full frame DSLR until now. It is a favorite of those who shoot landscape, and I’ve seen people using it successfully to shoot almost any type of subject.

Given the relatively brief product life of DSLRs – they are often replaced by updated/new models in as little as 18 months – many had been expecting an update to the 5D for some time. When Canon announced and released the new 5D Mark II (5D II or 5D2 for short) this fall, the excitement among Canon photographers peaked. At some discussion forums I read you might find that half of the posts concerned this camera at times!

The specifications explain why the 5D II is such a compelling camera. The photosite density of the full frame sensor has been increased, and the new model has a 21+MP sensor, nearly double that used in the original 5D- but with higher ISO capability, greater dynamic range, and no increase in noise. It incorporates newer Canon DSLR features including “live view,” an exciting HD movie mode, Canon’s sensor dust reduction system, the ability to fine tune the auto-focus system to your lenses, increased “weather resistance,” and more. All of this and the price has actually dropped a few hundred dollars from the list price of the original 5D. 

Many photographers have gone to great lengths to be the very first to get the new camera. They have signed up on “waiting lists.” Some have paid pre-order fees so that they would “have dibs” on the first boxes to arrive. Others frantically post on forum boards asking which dealers have one in stock, and are apparently ready to drive great distances to pick one up. I’ve even seen a few posts in which the writer offered many hundreds of dollars as a “finders fee” to anyone who would locate a 5D II. And you can be quite sure that all of these folks are paying full list price (and more) for their new cameras.

Not me.

There is a pretty decent chance that I’ll get this camera eventually, but I’m in no big hurry to be the “first on my block” to get one. Here are some of the reasons:

  • My existing 5D produces quite good image quality already. While the 5D II is capable of “better” resolution, the difference is certainly one of degree and not a “night and day” difference. When I make good sized prints, sensor resolution is rarely the limiting factor – whatever enlargement limit I encounter is more likely due to focus issues, lens issues, camera motion issues, and so on. Already having a camera that is capable of capturing images with excellent resolution, I’m know that I do not need to rush to get the incremental improvement that the 5D II might provide.
  • I prefer not to be a beta tester.  There is a very good chance that problems will be discovered when the first production run of any product finds its way into the hands of end users. Nothing against the manufacturers (in the majority of cases), but when many thousands of photographers use a new camera it should not surprise anyone that certain subtle issues emerge. In fact, it appears that this may have already happened with the 5D II. I read today that Canon has released a statement acknowledging that they are looking into two issues: “black dots” that appear to the right of bright highlights in some images and banding issues that appear when certain settings are used. Based on my previous experience with Canon, I’m confident that they will resolve these issues, but I would just as soon wait until after that happens.
  • Why pay list price? You don’t have to be an economist to know that the price of an item will be higher when the demand is highest. When a new product is released, typically after a marketing buildup and plenty of “buzz,” there are many buyers who are so excited that they will pay almost anything to get it. Now. No matter what. The manufacturers and retailers are willing to oblige them. ;-) You can get one of the first copies of a camera like this, but you are almost certain to pay a premium for the privilege. If you need the camera right now you don’t have much choice. But if you already have a camera that can produce fine images (like my current 5D) there is little rational reason to buy immediately at the higher price. In a few months we’ll undoubtedly see the price begin to drop.

Here’s my bottom line on the 5D II: I think that it looks like a really fine camera. It provides a very compelling feature set at a very reasonable price. If I didn’t already have a good camera that serves me pretty well, I’d probably plan to pick one up fairly soon. However, I’ll wait until the initial bugs have been identified and fixed in the manufacturing process and until the price softens a bit.


If you are ready to buy, you can purchase this product from B&H Photo via this link and help support this web site – thanks!