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Hi, Photo Zone and Lens Rental are my two trusted sources when it comes to lens resolution review. But from time to time, I am baffled to see quite some discrepancy between them. Wanted to make a post here to see if anyone had the same doubts or have answers to this. Eg.1 photo zone shows very minor difference in resolution between the batis 85 and Sony 85 1.8, while LensRental shows the MTF chart between the two lens has quite a perceivable difference. Eg.2 photo zone shows quite a bit resolution difference between the Zony 55 1.8 and Sony 85 1.8. While LensRental shows the MTF charts are very comparable between the two. The first discrepancy might be explained in that the main difference in LensRental MTF chart is in the high frequency lines, and the CMOS pixel density was not fine enough to pick up the difference. (50lp/mm is equivalent to 1200 line pairs across the sensor height of 24mm, while A7R2 has around 5000pixel across CMOS height, so about 4 pixels per line pair, 2 pixels per line) However the second discrepancy really baffles me. Maybe it’s because of different focus distance? (LensRental does test at infinite distance, while photo zone does it at a finite if not close distance) Anyone has any thoughts on this? reference: http://www.photozone.de/Reviews/overview#sony_aps https://www.lensrentals.com/blog/2017/06/sharpness-tests-of-the-sony-fe-85mm-f1-8-g/ https://www.lensrentals.com/blog/2016/06/the-sony-fe-lenses-mtf-and-variance-summary/