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Archive 2018 · Tamron 28-75/2.8 FE Infinity test (Resolution & Contrast)

Fred Miranda
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p.1 #1 · p.1 #1 · Tamron 28-75/2.8 FE Infinity test (Resolution & Contrast)

A couple days ago, I tested the Tamron 28-75/2.8 FE lens at infinity and was impressed by its resolving power and contrast, especially at center. Mid-zone and edge improve greatly when stopping the lens down to f/8 for most focal lengths.
I really liked its performance at 28mm and 75mm while the 35-50mm range, shows noticeable astigmatism towards the corners.

I tested it at several focal lengths: 28mm, 35mm, 50mm and 75mm. Sharpening was identical for all images and vignetting/distortion correction was set to "off".
Apertures tested: f/2.8, f/4, f/5.6 and f/8.
(I didn't see any significant improvement going f/11 and very noticeable diffraction at center and mid)

Here are the crops (Center, Mid and Extreme edge) for each focal length tested:

28mm f/2.8-f/4

Center, Midzone and Extreme Edge

Center 1:1 - High resolution wide open with noticeable improvement at f/4

Mid-Field 1:1 - Ok wide open with great improvement at f/4

Extreme Edge 1:1 high vignetting wide open and noticeable improvement in resolution/contrast at f/4

Sep 13, 2018 at 12:38 PM

Fred Miranda
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p.1 #2 · p.1 #2 · Tamron 28-75/2.8 FE Infinity test (Resolution & Contrast)

28mm f/4-f/5.6

Center, Midzone and Extreme Edge

Center 1:1 - Small improvement at f/5.6

Mid-Field 1:1 - Noticeable improvement at f/5.6

Extreme Edge 1:1 - Great improvement at f/5.6 (Vignetting, Resolution and Contrast)

Sep 13, 2018 at 12:42 PM

Fred Miranda
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p.1 #3 · p.1 #3 · Tamron 28-75/2.8 FE Infinity test (Resolution & Contrast)

28mm f/5.6-f/8

Center, Midzone and Extreme Edge

Center 1:1 - Showing diffraction going to f/8

Mid-Field 1:1 - Noticeable improvement at f/8

Extreme Edge 1:1 - Noticeable improvement at f/8

Sep 13, 2018 at 12:42 PM

Fred Miranda
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p.1 #4 · p.1 #4 · Tamron 28-75/2.8 FE Infinity test (Resolution & Contrast)

Summary at 28mm:
Optimum aperture for best resolution/contrast across the field: f/8
Best center resolution: f/5.6

__________

35mm f/2.8-4

Center, Midzone and Extreme Edge

Center 1:1 - Noticeable improvement at f/4

Mid-Field 1:1 - shows astigmatism but nice improvement at f/4

Extreme Edge 1:1 - Astigmatic but improvement at f/4

Sep 13, 2018 at 12:44 PM

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p.1 #5 · p.1 #5 · Tamron 28-75/2.8 FE Infinity test (Resolution & Contrast)

35mm f/4-5.6

Center, Midzone and Extreme Edge

Center 1:1 - No improvement going to f/5.6

Mid-Field 1:1 - Small improvement going to f/5.6

Extreme Edge 1:1 - Small improvement going to f/5.6

Sep 13, 2018 at 12:45 PM

Fred Miranda
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p.1 #6 · p.1 #6 · Tamron 28-75/2.8 FE Infinity test (Resolution & Contrast)

35mm f/5.6-8

Center, Midzone and Extreme Edge

Center 1:1 - Starts to diffract at f/8

Mid-Field 1:1 - Noticeable improvement at f/8

Extreme Edge 1:1 - Small improvement at f/8

Sep 13, 2018 at 12:45 PM

Fred Miranda
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p.1 #7 · p.1 #7 · Tamron 28-75/2.8 FE Infinity test (Resolution & Contrast)

Summary at 35mm:
Optimum aperture for best resolution/contrast across the field: f/8
Best center resolution: f/4

__________

50mm f/2.8-4

Center, Midzone and Extreme Edge

Center 1:1 - Big improvement at f/4

Mid-Field 1:1 - No improvement at f/4

Extreme Edge 1:1 - Astigmatic with noticeable improvement at f/4

Sep 13, 2018 at 12:46 PM

Fred Miranda
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p.1 #8 · p.1 #8 · Tamron 28-75/2.8 FE Infinity test (Resolution & Contrast)

50mm f/4-5.6

Center, Midzone and Extreme Edge

Center 1:1 - Small improvement at f/5.6

Mid-Field 1:1 - No improvement at f/5.6

Extreme Edge 1:1 - Small improvement at /5.6

Sep 13, 2018 at 12:47 PM

Fred Miranda
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p.1 #9 · p.1 #9 · Tamron 28-75/2.8 FE Infinity test (Resolution & Contrast)

50mm f/5.6-8

Center, Midzone and Extreme Edge

Center 1:1 - Diffracts at f/8

Mid-Field 1:1 - Small improvement at f/8

Extreme Edge 1:1 - Noticeable improvement at f/8

Sep 13, 2018 at 12:48 PM

Fred Miranda
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p.1 #10 · p.1 #10 · Tamron 28-75/2.8 FE Infinity test (Resolution & Contrast)

Summary at 50mm:
Optimum aperture for best resolution/contrast across the field: f/8
Best center resolution: f/5.6

__________

75mm f/2.8-4

Center, Midzone and Extreme Edge

Center 1:1 - Small improvement going to f/4

Mid-Field 1:1 - Noticeable improvement at f/4

Extreme Edge 1:1 - vignetting improvement and small gain in resolution

Sep 13, 2018 at 12:49 PM

Fred Miranda
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p.1 #11 · p.1 #11 · Tamron 28-75/2.8 FE Infinity test (Resolution & Contrast)

75mm f/4-5.6

Center, Midzone and Extreme Edge

Center 1:1 - Small gain going to f/5.6

Mid-Field 1:1 - Noticeable improvement at f/5.6

Extreme Edge 1:1 Noticeable improvement at f/5.6

Sep 13, 2018 at 12:50 PM

Fred Miranda
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p.1 #12 · p.1 #12 · Tamron 28-75/2.8 FE Infinity test (Resolution & Contrast)

75mm f/5.6-8

Center, Midzone and Extreme Edge

Center 1:1 - No improvement going to f/8

Mid-Field 1:1 - No improvement going to f/8

Extreme Edge 1:1 -No improvement going to f/8

Sep 13, 2018 at 12:51 PM

Fred Miranda
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p.1 #13 · p.1 #13 · Tamron 28-75/2.8 FE Infinity test (Resolution & Contrast)

Summary at 75mm:
Optimum aperture for best resolution/contrast across the field: f/5.6
Best center resolution: f/5.6

Sep 13, 2018 at 01:18 PM

umsl12
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p.1 #14 · p.1 #14 · Tamron 28-75/2.8 FE Infinity test (Resolution & Contrast)

Thanks Fred! Could you test it against 24-105/4 when you have a chance? And how is the Tarnron compared to Sony 24-70 GM based on your experience with it? I sold my GM last month and I really miss a 2.8 zoom.

Sep 13, 2018 at 01:47 PM

elicious
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p.1 #15 · p.1 #15 · Tamron 28-75/2.8 FE Infinity test (Resolution & Contrast)

Fantastic test, Fred, thanks for doing all that work!

I'd echo the above request for your impressions regarding how well this lens stands up to the 24-70GM and 24-105G...please

I'm guessing that this post will sell quite a few of these in the coming days lol

Sep 13, 2018 at 02:42 PM

Fred Miranda
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p.1 #16 · p.1 #16 · Tamron 28-75/2.8 FE Infinity test (Resolution & Contrast)

Although not side by side tests, the crops from this thread can be compared to the ones on the FE 24-105/4G's thread:
https://www.fredmiranda.com/forum/topic/1498758 (I don't own the Sony anymore)

Both copies I tested (Sony and Tamron) were surprisingly well centered and sharp at all distances, so this is a good reference.

My opinion is that for landscapes and travel, the FE 24-105/4 performs better across the frame. The Tamron has great contrast and resolution at center but mid and corners can't keep up with the Sony zoom even at smaller apertures.

Physically, the 24-105/4 is about 100g heavier but its range is more useful. (Better built as well). Outside of landscapes, I would probably go with the Tamron for its price, weight and faster aperture although I'm not a fan of its OOF rendering.

I can post a Tamron 28-75/2.8 FE comparison to to some of my primes (lox 35, Lox 50 and ZM 85) if there is interest. The primes are way better off-axis but similar at center.

Sep 13, 2018 at 02:51 PM

elicious
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p.1 #17 · p.1 #17 · Tamron 28-75/2.8 FE Infinity test (Resolution & Contrast)

Thanks, Fred!

Sep 13, 2018 at 03:02 PM

Lethang90b
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p.1 #18 · p.1 #18 · Tamron 28-75/2.8 FE Infinity test (Resolution & Contrast)

Thank for your work. I cant not wait my coming.

Sep 14, 2018 at 02:22 AM

pdmphoto
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p.1 #19 · p.1 #19 · Tamron 28-75/2.8 FE Infinity test (Resolution & Contrast)

Fred Miranda wrote:
Although not side by side tests, the crops from this thread can be compared to the ones on the FE 24-105/4G's thread:
https://www.fredmiranda.com/forum/topic/1498758 (I don't own the Sony anymore)

Both copies I tested (Sony and Tamron) were surprisingly well centered and sharp at all distances, so this is a good reference.

My opinion is that for landscapes and travel, the FE 24-105/4 performs better across the frame. The Tamron has great contrast and resolution at center but mid and corners can't keep up with the Sony zoom even at smaller apertures.

Physically, the 24-105/4 is about 100g heavier but its range is more...Show more →

It looks like vignetting and distortion correction were on for the Sony 24-105? Being on for the 24-105, and off for the Tamron would put the Tamron at a disadvantage. Sometimes you adjust corner samples manually, and sometimes color for the entire frame. Would be better with more consistency. Since you also test lenses without profiles available, it would be nice to see all your lens tests without built in cooking (lens profiles) and no color adjustments. Aren't lens profiles were available for the Tamron 28-75 FE?

Sep 14, 2018 at 03:29 AM

GabrielPhoto
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p.1 #20 · p.1 #20 · Tamron 28-75/2.8 FE Infinity test (Resolution & Contrast)

Great work Fred!
Can you test 75mm vs 75mm at say 10' from the subject? Some tamron lenses have BIG focus breathing issues.
Thanks

Sep 14, 2018 at 09:16 AM

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