G'day again Clayton
It appears to me that we are in substantive agreement ... :-D .
If one compares an excellent lens such as (say) the Canon f/2.8 100mm macro with a somewhat ordinary lens for mFTs such as the 14-140, I would expect the far better lens to give you that ability to crop and achieve comparable results.
If the lens choices were the other way around, or even equal, I would expect the mFTs image to be better than the cropped APS-C or 135 format image. This has been my experience when I have edited such images.
There is an entirely misplaced idea that does the rounds here often that one can simply crop the centre out of a similar MPx density image of a larger format. Often, this will work acceptably well if one does not print larger than (say) A3 size. IME, getting an image to the next size up (around A2 - or 22x17 inches) is where the problem lies, regardless of the original format.
In order to print at A2 size, the original image must be all but perfect technically IME. It is more than just difficult to conceal imperfections in the image at this sort of print size.
Once one gets to A2 size, any further increases appear to be constrained by viewing distance. Sizes of A1 and up require one to stand back from the print to view the entire print. A2 is the last size where one can actually view the entire print at point blank range (about 500 mm viewing distance).
Fair enough and all good points.
Thank you.
I have just had my nose rubbed in the very points I was making to you.
My wife's work has just been photographed by a professional photographer at the Uni she is attending as a final year student. He used a D800e with a Nikkor 24-120 lens (one hopes that it is v.2 of this lens ... ) at f/16 and f/20 and between 80-100 mm. She received 4x 8-10 MB JPEGs from the photog this morning.
While the lens is not exactly cheap at around US$1,400, it is by no means a stellar performer. I would say very average at best! SLRGear tested it here on the D3x and D300:
http://slrgear.com/reviews/showproduct.php/product/1358/cat/13
It performs better on the D300, but its performance on the D3x is very average at these FLs and f-stops. The CA is pretty noticeable, even in the PP JPEGs. It is unfathomable to me why he has used such small apertures with this lens and particularly with this body ... He would have been far better using f/8 or f/11 with this lens at these FLs.
Why he would choose to use such a lens on a D800e is utterly beyond me!
This lens (f/2.8 70-200 MkII) would be a far better match for this body, and for the work (check out the testing using the D700. I have also seen images taken using this lens on a D3x - lovely and stunning):
http://slrgear.com/reviews/showproduct.php/product/1280/cat/13
My 6 y.o. E-30 + 14-54 MkII comfortably outperforms the D800e + 24-120 MkII for the same task! See here:
http://slrgear.com/reviews/showproduct.php/product/1239/cat/15
Use the widget and sliders to f/8 and 35-54 mm FL. This test is using the E-510 (which I own). My E-30 is just noticeably better than my E-510 with the same lens for this kind of work. Bear in mind that the 14-54 MkII is sharper again at f/5.6-6.3, which is where I mostly use it when photographing my wife's work.
BTW, the same argument I made in my posts above also goes when comparing lenses on a given body. I fully expect my f/2 50 macro to outperform both my f/2.8-3.5 14-54 MkII (it does ... ) and my various kit lenses for my various bodies). However, I can print to A2 size from all these combinations, even from images taken with my f/2 50 macro on my E-1 (5MPx ... ). Just avoid 12 mm on my mFTs 12-50 macro. Apparently the CA is quite shocking ... ;-) .
It really is also a matter of knowing one's gear, whatever that might be, and working to its strengths.
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Regards, john from Melbourne, Australia.
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