Good article about resolution and megapixels

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Please don't take Ken Rockwell as an expert on anything but his own opinion. Some of his writings are rather off the mark.

I moderate a Canon FD system Forum on Photo.net and some of the stuff Ken has written shows the limits of his knowledge. He gets a lot of "press" due to people disagreeing with his opinion and mentioning it in Photo forums.

He is entitled to his opinion. But make sure you read more then just his blog.
 
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Please don't take Ken Rockwell as an expert on anything but his own opinion. Some of his writings are rather off the mark.

I moderate a Canon FD system Forum on Photo.net and some of the stuff Ken has written shows the limits of his knowledge. He gets a lot of "press" due to people disagreeing with his opinion and mentioning it in Photo forums.

He is entitled to his opinion. But make sure you read more then just his blog.

I don't agree with everything Ken has to say either, and he his entitled to his own opinions. But I do have to agree with him about the megapixel myth.
As I have come to the same conclusion of what he is saying by making comparisons of various cameras and mega pixel sizes. I have been doing digital photography since digital cameras 1st started becoming available to consumers in the late 80s and early 90s.
 
Ditto on the megapixel routine. My friend Mike is a working pro who went digital pretty early. He has sample 16 X 20 prints made from a 4 megapixel shot and they are quite excellent. He uses a pro-grade Canon with full-size sensor.

Mr. Rockwell's point is that ALL CURRENT DSLR cameras have more than enough pixels and that increasing pixel count is no longer a valid reason for upgrading equipment.
 
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Ditto on the megapixel routine. My friend Mike is a working pro who went digital pretty early. He has sample 16 X 20 prints made from a 6 megapixel shot and they are quite excellent. He uses a pro-grade Canon with full-size sensor.

Mr. Rockwell's point is that ALL CURRENT DSLR cameras have more than enough pixels and that increasing pixel count is no longer a valid reason for upgrading equipment.
.....although I couldn't agree more, DanJ, there's one more thing you can do after that....be on the lookout for used "fast" lenses, which grab a larger slice of the scene to be compressed for whatever total pixel-count camera you got....when your lens cap gets over 70mm size, it can be sweet....the 85 1.4 manual I've got takes a 72mm filter....that's a nice grab....remember the tomato mites?.....

.....it's kinda' like you're doing something on one side of the fence, to get better tomatoes from the other side.....
 
Yeah i read this before and it helped a lot for the basics. Love the Myth and the Hype part. :thmbsp:
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I don't agree with ANYTHING Rockwell has to say. There's so much misinformation in his article I don't even know where to start...

His VERY first sentence is horseshit.

I find it funny to looking at his "myth" We, being audio nuts are head over heals crazy about comparing audio. We could have two speakers with IDENTICAL response curves and spend 600 pages talking about the difference we can "hear" Here's Ken stating that there is no significant difference between resolutions until the until they are quadrupled. What a quack. A subtle difference is a difference that matters visually.

Rockwell needs to leave KenWorld and join us here on Earth for a few days and see how things really are.
 
I don't agree with ANYTHING Rockwell has to say. There's so much misinformation in his article I don't even know where to start...

His VERY first sentence is horseshit.

I find it funny to looking at his "myth" We, being audio nuts are head over heals crazy about comparing audio. We could have two speakers with IDENTICAL response curves and spend 600 pages talking about the difference we can "hear" Here's Ken stating that there is no significant difference between resolutions until the until they are quadrupled. What a quack. A subtle difference is a difference that matters visually.

Rockwell needs to leave KenWorld and join us here on Earth for a few days and see how things really are.

Just like you, everyone is entitled to his or her opinion about things. :D
 
I don't agree with ANYTHING Rockwell has to say. There's so much misinformation in his article I don't even know where to start...

His VERY first sentence is horseshit.

I find it funny to looking at his "myth" We, being audio nuts are head over heals crazy about comparing audio. We could have two speakers with IDENTICAL response curves and spend 600 pages talking about the difference we can "hear" Here's Ken stating that there is no significant difference between resolutions until the until they are quadrupled. What a quack. A subtle difference is a difference that matters visually.

Rockwell needs to leave KenWorld and join us here on Earth for a few days and see how things really are.
.....Rick, come on, tell us how you REALLY feel about Rockwell's sayings :D.....
 
I guess what bugs me about Ken is that he doesn't state "This is my opinion" He comes across like he's got facts to back his statements up, and many times, he doesn't, or he has one side that enforces his opinion.
 
I guess what bugs me about Ken is that he doesn't state "This is my opinion" He comes across like he's got facts to back his statements up, and many times, he doesn't, or he has one side that enforces his opinion.
.....I'd call that a worthy argument.....
 
The rule about imaging systems is that you find the thing that is reducing the resolution, and improve that, and then you can improve other parts. Everything contributes somewhat, but if you put too much into one aspect (like the ridiculous Megapixel race in small-sensor cheap cameras) the effort is really wasted. This is why analog TVs showing a NTSC picture derived from a digital converter box on a HD program look better than they ever did on NTSC - but not twice as good!

So, it';s not ALL in the glass or ALL in the sensor/film. Either one can be the limiting factor in a particular case. Over-all best requires all parts to be good.
 
The rule about imaging systems is that you find the thing that is reducing the resolution, and improve that, and then you can improve other parts. Everything contributes somewhat, but if you put too much into one aspect (like the ridiculous Megapixel race in small-sensor cheap cameras) the effort is really wasted. This is why analog TVs showing a NTSC picture derived from a digital converter box on a HD program look better than they ever did on NTSC - but not twice as good!

So, it';s not ALL in the glass or ALL in the sensor/film. Either one can be the limiting factor in a particular case. Over-all best requires all parts to be good.

What you said is very true! I have read other opinions on the megapixel myth besides Ken Rockwell's. Most agree like you said that crowding more and more pixels on a small sensor is not going to make the picture that much better. Sometimes it degrades the image because of noise factors.
A lot of other factors such as the lens, the in-camera processing program and noise reduction program all have a part in the final image output.
I have been using digital cameras since 1997 when the highest resolution camera I could get was a Ricoh RDC1 which had a resolution of .5 mpg. The images that it put out and printed at 4" X 6" looked as good as later cameras at 3 mpg. So there is a lot of truth in what Ken was saying about resolution. I have printed pics from 3 mpg cameras at 8" X 10" that looked as good as those made from 5 or 6 mpg cameras.
The only thing a large mpg camera does is give you the ability to make larger prints of your images and still keep most of the detail there. The average person is not going to be able to tell the difference between a 4" X 6" pic made from a 4 mpg or a 8 mpg. The difference in image quality between a 8mpg and a 10 mpg camera is just not enough to be noticed. Now when you get into APS sized sensors it's a whole different ball game.
 
I need resolution, because I like room to crop, edit, etc.

Ken's argument only applies if you do not intend on resizing or cropping. I don't buy the crap he spews anyway, I just roll with what works.
 
Do your cropping in camera instead. As for me, I like to print full frame as much as possible with little to no cropping. Digital or analog, makes no difference to me. I tell my students that if you start hacking away at your prints then you weren't close enough to the subject to fill the frame. Move closer or use a longer lens.
 
Ken's argument only applies ...

Never heard of him till someone posted a link in the other thread... Said the same thing. Opinions guised as product reviews.


posted by pioneervato
Do your cropping in camera instead.

With all due respect... I hear what you are saying. I lived by that rule for years. Time is money. More time in the darkroom equals less money. But with digital and Pshop the rules have changed. Don't you think trying to apply the rules of film to digital a bit misguided? Once again, no disrespect meant.

I tell my students that if you start hacking away at your prints then you weren't close enough to the subject to fill the frame.

When training new photographers we have a rule. Before you press the shutter halve the distance. So I don't disagree. But your statement only applies to that typical rookie mistake.

What if you can't get close enough to your subject? Like a fence bars the shot? What if you just can't visualize the shot, or are shooting a new subject, in a new environment? I'm not saying crop every shot. But there are times to shoot with cropping in mind. There are a lot of tools at our disposal with digital. It requires a new mindset that isn't easily embraced for those of us entrenched in the old ways.

Once again, not starting a flame war. I do think it's still a good rule to live by. But things are changing.
 
I think what most are missing here is that you need a good image to start out with. If you have a crap image, all the megapixels in the world is not going to help. My philosophy is to start out with the best image you can get, then you have something to work with no matter what the megapixels are.
I have cropped, edited and resized 3 mgp images and printed them out at 8"X10" and they looked fine.
I agree with pioneervato. The basic rules of photography apply just as well to digital shooting as to film shooting.
Instead of taking the time to get the image right in the 1st place many people want to photoshop the problems in their pictures. Get the lenses, flash units and filters to get the best images you can when you take them.
 
Devil's advocate.

Isn't a computer just a darkroom? And isn't Photoshop just the modern day equivalent of dodging and burning?

Ansel Adams elevated dodging and burning to an art form. Many of his famous prints were manipulated in the darkroom with these two techniques. Adams wrote a comprehensive book on this very topic called The Print.

So Ansel Adams only gets it half right in the lens?

I'll say it again. I don't disagree. I personally just don't think it's necessary to live and die by these rules anymore.
 
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With all due respect... I hear what you are saying. I lived by that rule for years. Time is money. More time in the darkroom equals less money. But with digital and Pshop the rules have changed. Don't you think trying to apply the rules of film to digital a bit misguided? Once again, no disrespect meant.



When training new photographers we have a rule. Before you press the shutter halve the distance. So I don't disagree. But your statement only applies to that typical rookie mistake.

What if you can't get close enough to your subject? Like a fence bars the shot? What if you just can't visualize the shot, or are shooting a new subject, in a new environment? I'm not saying crop every shot. But there are times to shoot with cropping in mind. There are a lot of tools at our disposal with digital. It requires a new mindset that isn't easily embraced for those of us entrenched in the old ways.

Once again, not starting a flame war. I do think it's still a good rule to live by. But things are changing.

No offense taken HH, but....

I have been teaching photography for 30 years and since teaching students involves a lot of darkroom work, cropping in camera makes sense from the standpoint that when enlarging a negative to an 8x10 or larger then the quality suffers greatly when I start having my students crop the hell out of a print because they were too lazy to get closer to their subject. I try to teach all my students good habits with their cameras and in the darkroom. Also, in my original post you refer to, I did mention the use of a longer lens if getting closer is not possible. :yes:

Since most of my students are "rookies" that make a lot of mistakes and not working professionals (they are high school students by the way) then it is my objective to teach them the finer points of photography as it relates to subject matter, composition, lighting, exposure, film processing and the making of fine black and white prints. So money is not the issue here as it might be with you as a working professional , as you can see. Should some of them become working professionals (it's always my hope) they can make their own choices about how to handle post production.

How can applying the rules of good photography be misguided? It matters not if you shoot with a digital camera, video camera, film camera, pinhole camera, camera obscura, or whatever floats your boat, the rules of photography (film or otherwise) applies to all as it is nothing but a way to capture an image through the action of light just as any other image capturing device of your choice.

A lot of my students come to my class at the beginning of a new term not even owning a film camera. This was not always the case. Their parents will go out and buy them the cheapest POS disposable film camera at Wally World but hardly hesitate of buying them a $400 cell phone, iPod, PS3, etc. etc. For me to even consider teaching them any differently just because they don't have a nice Nikon or Canon (whatever) film camera with adjustable f-stops and/or shutter speeds should never get in the way of teaching them the rules of good photography. Does it not stand to reason that if one learns "good" rules of photography using a digital camera that those rules can be applied when using a film camera (and vice versa) as well?

As much as I do like digital photography, I often am under the impression that Photoshop and other photo editing software can become a substitute for good photography for the reasons you mention. Photo editing software is just another tool and too many users tend to rely on it to correct bad photography.

My apologies to the OP for going off topic but "good" photography and "good" shooting techniques should never be compromised and to suggest that applying the rules of "film" photography to "digital" photography is a bit misguided just doesn't sit right with me. But we all have our opinions and I respect them all even if I don't always agree with them.

If I see a photograph that I like, it matters not to me if was done with color film, black and white film, or digital (even if it was done by a Canon camera :D). A good photograph became a good photograph because some "rules' were applied. These are rules I try to live by with my own photography and what I try to impart with students I teach.

Regards,

Jess
 
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