http://www.ephotozine.com/article/olympus-m-zuiko-digital-75mm-f-1-8-lens-review-20557
I just got this lens the other day and noticed that it makes a vey quiet, yet noticeable grinding sound when focusing manually. Is that normal? It also makes a noise when focusing automatically. I have the panasonic shotgun mic attached to the GH3 for audio recording and it definitely picks up the sound. Is my lens defective or is this normal for this lens? I don't notice it on my 17mm or 45mm, but haven't tested.
Would love some direction on this. You can hear it in this video at around the three second mark - small clicking sounds.
Tried it on both my GH3 and GH2, seems to be doing the same sound but it's not that noticeable unless I really put my ear to it. Cameras set to MF
Also, on both cameras, if I set them to AFS and rotate the focus barrel, it does not make the grinding sound
The Olympus M.Zuiko 75mm f/1.8 ED is, by quite a margin, the best micro-four-thirds lens that we have tested to date. It is ultra-sharp straight from f/1.8 and in fact, it is basically diffraction-limited so stopping down doesn't really improve the image quality anymore.
Olympus 75mm f/1.8 Lens Review
As with the other Olympus lenses we have review lately, the 75mm f/1.8 does not disappoint. It does a great job of creating crisp, clear images with little to no distortions.
Overall, the M.Zuiko Digital 75mm f/1.8 is one of the sharpest lenses we've ever tested. In real-life situations we would not hesitate using it at any aperture setting except f22, which is not a common f-stop to use on a telephoto lens anyway.
http://www.photographyblog.com/reviews/olympus_m_zuiko_digital_75mm_f_18_review/
"Could be really good line: 12mm, new 14mm F1.8, new 17mm F1.8, new 25mm F1.8, 45mm F1.8, 75mm F1.8, and 150 F1.8 :-)"
Indeed, This would be a dream setup for mft.
I received recently, I love it. Some pictures I've done. GX7 + Zuiko 75:
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