I know that these adapters exist, the guy didn'tBut you can! Link.
Tho, I doubt the guy in the store knew this existed. Not sure if there any compromises by using this, good Ken seems to say no.
[2] Nobody's going to make me {{a 4/3 aficionado}} either, there are lots of them, they're entitled to like the smaller sensor, it's not for me due to noise and depth of field.
The main appeal of 4/3 is Zuiko glass.
Not only are the semi-pro and pro ZD lenses excellent optically - they are also so compact and *reasonable*!
I know I will miss my Zuikos after I switch to Canon.
But again, they go in front of a sensor that's smaller than everyone else, you lose at least a stop to a stop and a half to an APS-C sensor of the same generation and another stop and a half or so to a 35mm sensor. I also happen to think micro 4/3rds is going to kill actual 4/3rds.
Repeat after me "crop is not magnification." Now, "crop affects depth of field," and finally "megapixels in a crop affect diffraction."
*cough* *sputter* *cough* *cough* *sputter*
Funnily enough, I've seen quite a few people switch to Nikon because Canon doesn't offer an equivalent to the 200-400VR. But more to the point, please show a single Canon lens in *any* focal length that outperforms or has a better MTF than the Nikkor 400/2.8 AF-S VR.
Canon makes great telephoto glass at an awesome price, but you can't be the superior brand if (a) you don't have the best super-telephoto on the market and (b) your customers switch brands because of a telephoto lens.
Be aware though that different manufacturers have different measurement procedures, and therefore while comparing MTF charts between lenses in the same line is possible, and is in fact very useful in making a purchasing decision, doing so between different manufacturer's MTF charts isn't.
If you look at any E4x, E5x, or E3 reviews on dpreview.com, you will see that 4/3 sensors are in the same ballpark as the comparable APS ones. Not better, of course, but not even a half stop worse.
Largely as expected.
I do not really understand the point you were trying to make about diffraction - in fact, it makes no sense to me. The linear size of photosites themselves (2.1um for E3, 2.3um for Nikon D300) are similar for APS and 4/3 cameras. As for the lens aperture size, any Canon lens stopped down to f22 is going to diffract, and any 4/3 lens stopped down to f22 is going to diffract. But if we are talking about these lenses "sweet spot", then their diffraction characteristics are going to be largely similar in any reasonable shooting scenarios.
As for DOF, that argument also does not hold water, sorry. If you want an extremely shallow DOF on 4/3, there is a whole family of f2.0 Zuiko glass available. Something like a Zuiko 14-35 f2.0, for example. Or the 50mm f2.0 Macro. Even with my lowly 14-54 f2.8-3.5 I never had problems isolating my subjects from the background. Again, 4/3 is largely similar to APS cameras in this respect.
The end result is therefore that a 4/3rds camera has twice the depth of field as a 35mm camera with a lens covering the same field of view.
But 4/3 format has its definite advantages, and it is definitely not as terrible as you might imagine. In fact, the E3 is a pretty darn nice body.
I found this post interesting, because I wasn't at all familiar with the MTF measurements. After doing some homework, although incomplete, I have the following comments.
a. Isn't the Canon EF100mm-400mm F3.5-5.6 L with Image Stabilising a near equivalent to the 200-400VR? Or is there an issue with aperture?
b. I'm not sure how you're comparing MTF details between Canon and the Nikkor lenses. If you're relying on the manufacturers' MTF details, then the Luminous Landscape website says this:
Yes, I think you're missing something: the 200 mm f/2 lenses cost an arm, a leg and a first-born. The OP was asking about entry-level dslrs. For most things, Olympus has a full lens line-up.So to get the same field of view and depth of field as a 400/2.8, you'd need a 200/2, right? I don't see one. A 200/2 equivalent would need to be 100/1.4 as well, Unless I'm missing something?
Yes, I think you're missing something: the 200 mm f/2 lenses cost an arm, a leg and a first-born. The OP was asking about entry-level dslrs. For most things, Olympus has a full lens line-up.
I'm not saying that Olympus has the right camera for you, but for a consumer or even many enthusiasts, the points you mention are moot to irrelevant.
Interesting stuff. To be honest, the wildlife photographers I know use super-tele primes. In fact, from what I've read, even 400mm is considered a little bit at the wide end for serious wildlife photography.Not even close- the 200-400VR is only slightly down from a 300/2.8, 400/2.8, 500/4 or 600/4, the 100-400IS is better than the Nikon 80-400VR, but not in the same class as the super-tele primes. Both the 100-400IS and 80-400VR are "Prosumer" lenses with similar price points and target audiences and variable apertures (don't let the "L" designation or gold ring fool you) and while they're reasonable for what they are, they're not top-of-the-line professional lenses, the 200-400VR is. Plus you get to shoot in half the light at 400 or use a shallower DoF, both important considerations for wildlife shooters where these lenses are targeted.
That's not what I get from the samples on DPR using my Mk I eyeballs, I see about a stop's difference in noise from the E410/E510 samples versus APS-C.
http://www.dpreview.com/reviews/olympuse510/page17.asp
http://www.dpreview.com/reviews/OlympusE410/page16.asp
The dynamic range isn't all that either, though that's an Oly issue, not a 4/3rds format issue...
http://www.dpreview.com/reviews/olympuse510/page19.asp
http://www.dpreview.com/reviews/OlympusE410/page18.asp
The pure math says based simply on size that you lose about .79x over APS-C, but that doesn't take into account density or heat, which will worsen the measurement in real life- so about a stop seems pretty accurate.
OK, I'll bite.
First of all, look carefully at the pages you have linked to.
In particular, look at the noise-vs-ISO plots. Carefully.
As you can see, there is not all that much difference between the cameras they have been comparing.
Of course, it is not obvious to me that standard deviation of luminance value for an in-camera processed JPEG file is an accurate measure of sensor noise.
Still, it is amusing that you have chosen to link these particular pages.
But now let's look at RAW dynamic range.
Let me quote the DPR numbers for RAW dynamic range directly.
Olympus E510:
"The most we could achieve using Adobe Camera RAW was a total dynamic range of 9.6 EV although the last stop of this appears to have almost no color information."
Canon 400D:
"The best we could achieve (with some pretty extreme ACR settings) was just over 10 stops total dynamic range..."
While a half-stop advantage is nice, it is *nowhere* near the (physically impossible) 1 to 1.5 stop difference you have been claiming.
Another illustrative example is the APS-C Pentax camera that is being tested together with 400D and E510. It has significantly more sensor noise and less DR than either the Canon or the Oly. What this means is that the particular sensor chip quirks will generally have more influence on the measurement outcome than the small difference in linear size between 4/3 and APS.
.79x of what exactly? And how did you come up with this number?
Interesting stuff. To be honest, the wildlife photographers I know use super-tele primes. In fact, from what I've read, even 400mm is considered a little bit at the wide end for serious wildlife photography.
But yes I agree, based on what pros and various articles have said, that the 100mm-400mmIS lens is more of a 'prosumer' lens due to its lower levels of sharpness, and famous 'dust pump' zoom action etc. It might not put me off buying one for when I go on safari in Africa though. But for bird photography the 400mm f/5.6 prime is considered a far better (and actually cheaper) option for optical quality.
No, look at the actual pictures, since that's what you'd be using and that's the best head-to-head comparison you'll see online. If you look at the stamp shots and the dark patch shots you'll see the noise differences quite clearly- and general and chroma noise are visibly worse in the 4/3rds samples.
I haven't seen other direct comparisons so of course I link to the ones I've seen. If you have better direct comparisons please share them.
Actually, you appear to be somewhat reading challenged- I've been claiming noise differences in stops based upon the DPR sample images, not dynamic range differences which I said were an Olympus issue, not a 4/3rds issue (however the D40 seems to come out at 10.1 to 11 EV in Imatest results) and just not that flattering to the Oly cameras.
Pixel pitch for the same megapixel camera on the different sized sensors- it obviously changes slightly based upon which sized APS-C you're talking about- but seems to be a fairly good indicator of photon noise limited sensor performance.
OK, I'll bite.
First of all, look carefully at the pages you have linked to.
In particular, look at the noise-vs-ISO plots. Carefully.
As you can see, there is not all that much difference between the cameras they have been comparing.
Of course, it is not obvious to me that standard deviation of luminance value for an in-camera processed JPEG file is an accurate measure of sensor noise.
Still, it is amusing that you have chosen to link these particular pages.
But now let's look at RAW dynamic range.
Let me quote the DPR numbers for RAW dynamic range directly.
Olympus E510:
"The most we could achieve using Adobe Camera RAW was a total dynamic range of 9.6 EV although the last stop of this appears to have almost no color information."
Canon 400D:
"The best we could achieve (with some pretty extreme ACR settings) was just over 10 stops total dynamic range..."
While a half-stop advantage is nice, it is *nowhere* near the (physically impossible) 1 to 1.5 stop difference you have been claiming.
Another illustrative example is the APS-C Pentax camera that is being tested together with 400D and E510. It has significantly more sensor noise and less DR than either the Canon or the Oly. What this means is that the particular sensor chip quirks will generally have more influence on the measurement outcome than the small difference in linear size between 4/3 and APS.
Also note that I am not touching the issue of in-camera JPEG dynamic range. That will, obviously, be very much software-dependent.
.79x of what exactly? And how did you come up with this number?
The area of a 4/3 sensor is 225 mm2. The area of a Canon APS-C sensor is 329 mm2, i.e. it is 31.6% larger. Which means that the signal-to-noise ratio advantage of the Canon sensor, given that the manufacturing process/substrate is similar, and the image aspect ratio is the same, is sqrt(1.316). A whopping 14%.
This is the "pure math" treatment.
OK, enough with this nonsense.
Go shoot some pictures instead.
After all, I presume you are the pro photographer here. I am just a lowly physical chemistry PhD.
Peace
Here we go. I'm surprised that the Mod hasn't closed this now meaningless thread - "My (insert favorite brand here) is better than everything else because (insert some ultra-vague concept here)"...
It's all about the photographers talent...
There was a Nikon D90 on display at our last user group meeting, and I was intrigued by the fact that it is capable of HD video.
I also heard that there was a roughly equivalent Canon available, I think it was the EOS 5D Mark II, but I could be wrong. I've been using Canons so I'm disposed that way.
A guy I was discussing this with while we looked over the Nikon said he would be staying with Olympus for now due to the legacy lens issue.
This is starting to be more than mildly amusing.
Guess how do they come up with the numbers on the plots?
Do you even understand what these numbers are (and for that matter, what "standard deviation" means)?
These numbers are the quantitative measure of "blotchiness" of these dark patch shots you have been referring to. As in, the DPR staff actually *measured* how much noise there is on these dark patch shots. Yes, the same dark patches that they show you fragments of.
And, sure enough, there is more noise in the high ISO E510 samples than in the high ISO 400D samples. You can clearly see it on the plots. It is just that the difference is not as dramatic as you want it to be.
Processing the E510's RAW (ORF) files through Adobe Camera Raw (ACR) version 4.1, we had somewhat confounding results. ACR 4.1's automatic settings increased the visual dynamic range a little, but produced a very flat tone curve, with no depth to the shadows. (Basically the same behavior we encountered with the E410's RAW files.) With a little manual tweaking, we obtained much better results, and Imatest recognized more density steps, but the net results were still weak when compared to competing cameras. While weaker than other cameras though, the E510's manually-tweaked dynamic range results were a good 0.4 EV (that is, almost half an f-stop) better than those of the E410, at least when using the High and Medium-High quality thresholds for allowable noise. The results of the manual tweaking are reflected in the table below.
The net result was that the E510 performed rather poorly when compared against most current DSLR models, with a full f-stop or more less dynamic range than anything currently on the market. If you're willing to work from its RAW files directly though, it will still lag the field, but not as badly.
The results shown in the table are interesting. One of the first things that struck me when I initially looked at test data for a wide range of d-SLRs, was that here again, purely analytical measurements don't necessarily correlate all that well with actual photographic experience.
Regardless of the positions of the other cameras though, the Olympus E510 does appear to offer rather poor dynamic range, the one notably negative mark against what is otherwise a good-performing consumer SLR. Matters improve somewhat if you take the time to process its RAW files manually, but the results are still far from stellar.
As I always say though, at the end of the day I think you have to take the figures here with a grain of salt, and look at actual images with your own eyes to see what you make of each camera's tonal range and noise levels. We'll continue performing these dynamic range tests on the digital SLRs that we review, but (just as with the laboratory resolution target results), we suggest that you not rely on them exclusively for making your purchase decisions.
My point is that this particular experiment is really not a direct comparison of sensor noise, because each camera's demosaicing, noise reduction, and JPEG compression algorithms come into play.
The beauty of DPR is that they are quite consistent with their methodology, so everything is directly comparable.
DPR's methodology for determining DR is very simple.
They shoot a graduated wedge. Then they stretch the resulting RAW file in ACR, and see how many gradations they can see before either clipping (on the bright side), or fade-to-noise (on the dark side) occurs.
On a fundamental level, this experiment is equivalent to a direct sensor noise measurement. The reason I have quoted this result is because DPR staff use RAW to run this comparison, thus removing the difference in software from the equation.
When measured this way, under controlled conditions, the 4 cameras mentioned in the review you have linked have largely the same DR. And the E510 is not even the worst of the pack.
Throwing in some numbers from a measurement performed in a different manner, and under different conditions, is really not relevant, because the numbers will not be directly comparable. This is *not* how you design experiments.
But claiming that 30% of additional sensor area results in 1 full stop of signal-to-noise ratio improvement is ludicrous.
Nobody argues with Compuwar and wins, at least not in Compuwar's eyes.
I hear ya though Valiar. If you'd just made some bogus claims about Nikon being the best thing ever and that the new Nikon line would actually be able to cure Hepatitis C or something like that, you'd have saved yourself some time.
I like Olympus cameras, they're really nice and nobody can refute that. As you say, the engineers at matsushita have really done themselves proud with the 4/3rds concept. Bringing what shoudl be a completely crippled sensor size so close to the performance of sensors that are larger and supposedly "better" is no small feat. Just imagine what they could do with an APS-C or FF sensor.
You've outlined and backed up your arguments well, but some fanboyists aren't interested in logic and evidence, but rather Nikon and Canon are better just because is all they hear. It's been entertaining to read the exchange nonetheless!
SLC