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What is wrong with Lenstip tests?

Started Jan 27, 2020 | Discussions thread
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Holden75 Regular Member • Posts: 351
What is wrong with Lenstip tests?

Lenstip is used on this forum a lot as a reference point for discussion about lenses. I use it myself. But I was looking at some of the test results for the f2 primes and I noticed that when comparing them to other sites there seems to be - to me - something of a discrepancy. Here are some examples:

Lenstip has the 35 f2 https://www.lenstip.com/456.4-Lens_review-Fujifilm_Fujinon_XF_35_mm_f_2_R_WR_Image_resolution.html having the sharpest corners at f2 and getting worse from there. Opticallimits as a comparison site has the corners getting better to f5.6 https://www.opticallimits.com/fuji_x/985-fuji35f2?start=1

Lenstip has the 50 f2 marginally getting sharper corners from f2 to f4 and then them getting worse https://www.lenstip.com/499.4-Lens_review-Fujifilm_Fujinon_XF_50_mm_f_2_R_WR_Image_resolution.html while opticallimits has it getting better corners to f5.6 https://www.opticallimits.com/fuji_x/1014-fuji50f2?start=1

Lenstip has the 50f2 as the sharpest Fuji lens while Opticallimits has the 90 as being sharper https://www.opticallimits.com/fuji_x/968-fuji90f2?start=1

The opticallimits results seem to be in line with what I have read on other reviews that haven't been so diligent with reporting results. I was wondering if this is to do with different tests? If so, why do they show different patterns? Is this copy variation? If so, some of these tests seem to be quite different in terms of what they say about a lens. Is it something else?

 Holden75's gear list:Holden75's gear list
Fujifilm X100V Fujifilm X-T3 Fujifilm XF 35mm F1.4 R Fujifilm XF 23mm F1.4 R Fujifilm XF 56mm F1.2 R +1 more
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