RobCD wrote: Astroscapist wrote:
The 28-75/2.8 should, I think be compared to other 24-70/2.8
The 24-105/4 is another kind of lens. Not to be compared to f/2.8
I think since many people will consider the 28-75, 24-70 f2.8 and f4 and the 24-105 f4 - and - since the 24-105 is such a good lens despite the range it makes sense to compare provided you are realistic about the obvious differences. Comments like "I'm not buying the 24-105 because it's only f4" are absurd in my view because you knew it was f4 since the day it was announced. In that case you're right that someone shouldn't even include the 24-105 in their comparisons and evaluations.
People buy f/2.8 for a reason.
People buy more zoom range for another reason
People buy even more (super zoom) for a third reason.
All three has their up and downsides. I wouldn't consider any f/4 zooms if my main prioriity was that extra f-stop. I eould however consider f/4 alternative if the it was up to portability or sharpness or coma or vignetting or ghosting etc was my main priority.
If f/2.8 is not of weight in the decision, I wonder, why haven't those people already bougght the 24-105/4? Been out for awhile now.
Anyway, my main priority in this matter if f-stop first, then sharpness, then contrast. CA would nice to have controlled well and vignetting comes in last. Other can have other priorites, but f/2.8 vs f/4 (75 to 105). Those last mm will be my feet zooming in or croping from 42 Mpx to 18 Mpx. Considering I have other lenses for different purposes.
/Stefan
May 20, 2018 at 09:02 AM
Previous versions of Astroscapist's message #14473735 « Tamron 28-75mm f/2.8 VS Sony 24-105 f/4.0 »
