11-20-2017, 06:57 AM
Quote:Yes, it offers an insane max. aperture at this focal length but at least technically you won't find greatness at f/1.8. the corners are soft. Whether this matters at this aperture is a different question. Astrophotographers may have hoped for more (at least at 50mp) whereas it's a not an issue in shallow depth-of-field scenarios really.
Did you do a resolution test at âˆž ? Otherwise I just ask how do you rate the lens for astrophotography? And a very sharp center very wide open is just not great enough? I don't want to talk away the soft borders, but I'd like to discuss ultra wide shots, available lights and the importance of sharp corners ^_^
The stair house shot could not have benefitted of better corners - due to DoF the corners already are soft.
Emphasiszing something in the corners and a lot of blurred background? Don't know, so far I didn't feel my composition sucks because of weak corners.
However, I don't agree with the weak corners at âˆž and I know, you guys usually test at 25-50 Ã— f which in that case would be 50 Ã— 14mm = 700 mm distance between test chart and sensor. That's a bit bold to conclude from this distance to it's behaviour at distances suitable for astro.
Here's the full res.
Typically, I use the lens mostly for this kind of subjects
or that one
Soft corners? I don't care much, I'm not using this lens for reproductions of flat objects wide open
Of course I understand you're using the standards of PZ or OL for your tests and for all lenses, but there's were trouble starts: Not all lenses are needed/bought for the same purposes. Sharp corners are very interesting for a couple of subjects - just not for all and if it comes to wide angle lenses tested not even close to infinity, I scratch my head about the testing method.
What if the field curvatures radius approaches âˆž at âˆž? You haven't tested that, otherwise you would have told us.
And the Laowa 15/2 is only made for Sony E mount...