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04-20-2021, 06:06 PM
https://www.dpreview.com/news/2983705057...-wide-lens
Small, fast, and competitively priced. According to Lenstip that reviewed the lens already, also good. Nice!
04-20-2021, 07:39 PM
For all their complaints about the COVID crisis (and their pretty odd English), Lenstip sure are worth their salt.
Sony's MTFs for this lens are insane.
https://www.sony.com.au/image/74173195a36189bb4e87fb6c82200e18?fmt=jpeg&wid=1200&qlt=43
Chief Editor - opticallimits.com
Doing all things Canon, MFT, Sony and Fuji
04-21-2021, 05:03 AM
(04-20-2021, 09:35 PM)Klaus Wrote: Sony's MTFs for this lens are insane. Yeah... insane simulations at 10 and 30 lines. And then people test these with the 60MP sensor in a7R IV, which reveals whole another story. It is about time the industry moves to higher resolutions in MTF charts, and provide real measured data based on production averages, not simulated geometric data only. Zeiss does that, but hey - they also have more stable quality control than some other manufacturers
You just can't have too many lenses...
04-21-2021, 07:37 AM
(04-21-2021, 05:03 AM)faint Wrote:(04-20-2021, 09:35 PM)Klaus Wrote: Sony's MTFs for this lens are insane. Have you actually looked at samples taken with the lens before writing this? Check out the gallery at dpreview: https://www.dpreview.com/samples/5408622730/sony-fe-14mm-f1-8-gm-sample-gallery The photos speak for themselves, this lens is indeed crazy sharp as Klaus said. This photo was shot wide-open at f1.8. It's tack sharp across the frame at 50MP. Sony has been releasing amazing lenses lately.
04-21-2021, 07:53 AM
Yes, I did. Not that the samples are great for understanding how this lens would perform in landscape/astro scenarios, but I see exactly what I'm saying. Far corners are not as impressive as center resolution, although the MTF10/MTF30 charts obfuscates the issue. You can also see astigmatism taking its toll on a7R IV. Not saying that the lens is not good, give me a perfect ultra-wide anyway. But I still believe theoretical MTF30 is not indicative for lens performance on high-resolution bodies, nor it takes into consideration production capabilities and sample variation.
You just can't have too many lenses...
04-21-2021, 11:06 AM
Exactly, those MTFs from Sony are a bit silly.
Wide open: https://pliki.optyczne.pl/son14GM/son14_fot01.JPG The borders are not that great (CA issues, astigmatism pulling things "apart", while you would not have guessed that looking at those OOTW MTFs. No doubt a very good 14mm lens, but those MTFs are meaningless. 
04-21-2021, 11:11 AM
Well... MTFs show the (theoretical) performance in the focus plane. In that sample image, none of the corners is in focus. So, not a valid conclusion (from that image).
Not to say that manufacturer MTFs sometimes collide with actual performance in the field, though... far from it 
Editor
opticallimits.com
04-21-2021, 11:17 AM
(04-21-2021, 11:06 AM)Brightcolours Wrote: Exactly, those MTFs from Sony are a bit silly. That photo from lenstip is not representative of border sharpness. It's clearly not focus in the right spot or there is some field curvature going on. In comparison, look at these ones at f1.8, these are sharp: here
04-21-2021, 11:21 AM
(This post was last modified: 04-21-2021, 11:25 AM by Brightcolours.)
(04-21-2021, 11:17 AM)thxbb12 Wrote:(04-21-2021, 11:06 AM)Brightcolours Wrote: Exactly, those MTFs from Sony are a bit silly. The border has objects over a large depth in the lenstip photo.... So where do you propose the focus in the border actually is? And if field curvature is going on, that should be reflected in the Sony MTF too? The link you post does not work, but I see dpreview in the URL so my guess is that you link to post processed images, where the lenstip image is a plain conversion (as always) with no corrections and sharpening applied? Another lenstip wide open sample, again with lesser borders than those MTFs would suggest. https://pliki.optyczne.pl/son14GM/son14_fot13.JPG |
