Hi,
I recently purchased Schneider Symmar APO 150mm Copal 0. I conducted an improvised test with the shutter set at 1s, with the iPhone memo app. And got results varying from 1.2s to 1.28s.
I'm sure using iPhone app is not optimal but at 1s it seems it would be good enough to tell if something is off. Should I return this lens?
Thanks
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