ancient_mariner
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- Toni
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Well that's a zoom vs. prime comparison as supposed to a zoom vs. zoom (i know one of them is a superzoom style lens which generally have a bad rep).
even on A7RIV the main difference is in the corners and very slight difference in mid-zone. So on 24mp you might be able to pick up some difference in corners but generally speaking the difference will be lost unless you go desperately looking for it.
I think you are possibly underestimating the tamron lens but they have made some really good lenses recently with obvious compromise of the focal length rather than IQ. the 70-180mm was recently shown to be sharper than RF70-200mm by Dustin. the 17-28mm on lensrentals was tested to be as sharp as the GM for the most part. what you lose out on is really the 24mm end (which as Roger from lens rentals explains is a really hard focal length to develop lenses for which tamron have avoided to lose that complication).
Also the rendering isn't as good, the sunstars kinda suck tbh which is a real downer for me. I like my sunstars lol
I'm quite tempted by the 70-180, and now I have the 12-24 Sigma, I might consider swapping the 24-105 for Tammy's 28-70. But at the moment I'm just finding the pictures I take with wider range zooms dissatisfying, and it's more from that perspective than anything else. Chances are that if I see a pic on TP that's processed and presented well I'll have no idea what camera and lens was used to take it.









