Ichinichi wrote:
But it's so much sharpererer. Not worth it? Or would my "crop the 45mm for up to 78mm" not work?
chez wrote:
Ichinichi wrote:
What if I am willing to crop from 61mp to 20mp at the long end of the Sigma 28-45? Wouldn't I get 78mm FL?
Only problem is the Sigma 28-45/1.8 is hard to find used...and likely hard to sell if I decide to go another direction.
The Sigma weighs too much for simple family pictures. Get either the Sony or Sigma 24-70 and just bump up the iso if need be.
In the end, only you can say what is worth it to you. All gear involves trade-offs and the set of trade-offs which best suit one person aren't necessarily the set of trade-offs which best suit the next person.
For me, I would take one of the 24-70s over the 28-45, but that just reflects my preferences. For me, the size, weight and limited zoom range of the 28-45 make it less attractive to me than a 24-70 despite the 28-45 having a wider maximum aperture and apparently being a bit sharper. (I suppose I might consider a 28-45 in addition to a 24-70, to use when the wider maximum aperture was important to me. However, then the question would be whether I wanted to lug a 28-45 or one or two primes potentially with an even wider maximum aperture.)
As for cropping, in broad terms it should work. However, it is worth remembering that cropping means you are effectively using a smaller sensor than a full frame sensor, and that impacts image quality in the way that using a smaller sensor would, eg noise becomes more visible. So, crop an image from your 61mp full frame camera to the dimensions you would have got if you had used an APS-C sensor camera (and otherwise been the same place and used the same lens) and you will get similar image charasteristics (eg depth of field and noise) as if you had used an APS-C sensor camera rather than a full frame camera. That isn't necessary something to worry about, of course. After all, cameras with sensors smaller than full frame can take fantastic images. However the point is that cropping isn't entirely free of impact on image quality, so that is one of the trade-offs you have to weigh up.
Jul 11, 2024 at 09:17 PM
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