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20-70 f4 questions

  
 
Jack Flesher
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p.2 #1 · 20-70 f4 questions


I like the lens a lot. These are taken on my A7Cii, the first two at 20mm and the last one at around 45mm, all these at f7.1. I actually added vignette to these images. These are from the historic South Bay Area shrimping town of Alviso, CA -- it's where I generally head to test out new gear.

PS: I haven't used ACR for a long, long time to convert images. But I got tired of paying for both C1 and Adobe Photo subscriptions, so wanted to see if I could live with ACR. So far, I'm not overly impressed and may in fact bite the bullet and revert to C1.

















Jun 15, 2026 at 05:14 PM
TravelinBriNY
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p.2 #2 · 20-70 f4 questions


adventure_photo wrote:
It’s a great lens perfect for backpacking and I love mine. My copy is the first and only one I purchased brand new from B&H and it’s tack sharp edge to edge at f/8 and f/11 which are generally the apertures I use for landscapes. It’s lightweight and easy to carry. I use mine often with the A7CR and find it balances well. Sometimes I’ll pair it with a Batis 135 for something telephoto or even pair it with the Tamron 28-200. Lots of overlap between those two lenses but that zoom combo works well and covers 20-200 and not
...Show more

Curious how the Sony 20-70 compares to the Tamron 25-200; I have the 20-70 and Sigma 20-200 and am thinking of selling the latter as it sometimes mis focuses and has gaps in sharpness.

In terms of the 20-70G - like others on the thread, I've only ever had one copy and it's been well sharp enough for me. Photos specifically using this lens can be found here:

https://flic.kr/s/aHBqjABJaK





Jun 17, 2026 at 03:20 AM
adventure_photo
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p.2 #3 · 20-70 f4 questions


TravelinBriNY wrote:
Curious how the Sony 20-70 compares to the Tamron 25-200; I have the 20-70 and Sigma 20-200 and am thinking of selling the latter as it sometimes mis focuses and has gaps in sharpness.

In terms of the 20-70G - like others on the thread, I've only ever had one copy and it's been well sharp enough for me. Photos specifically using this lens can be found here:

https://flic.kr/s/aHBqjABJaK



I do not have the newer 25-200 and have the older Tamron 28-200 and I can say it's very sharp and very comparable to the 20-70 f/4 G throughout the whole 28-200 zoom range. That's one reason I like pairing those two lenses together because the image quality is quite good and consistent from 20-200 plus the Tamron is also a f/2.8 at 28mm. I've even been able to shoot astrophotography while out in the backcountry with the Tamron and having only those two lenses with me. I know these two lenses overlap each other quite a bit but I essentially use the 20-70 mostly, and consider the Tamron as my "70-200" that can go wider when needed. This combo helps me from swapping lenses all the time.



Jun 18, 2026 at 09:50 AM
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