Sony Lens Mystery (2) — After Sony’s answer

Sony2-Test

On the time of the first discovery of the strange phenomenon, inside of a Sony’s 30mm Macro lens, I gave an enquiry to the Sony.   And I got an answer from them which said :

“With reference to your enquiry and after further investigation, we would like to highlight that the Sony lens does not have a special technology used. Therefore, the focus resetting does not have to do with specific technology used inside the lens.

SONY SUPPORT TEAM
http://www.sony.co.uk/support/en “

As they didn’t answer why and what for the lens focus move, I check the lens and found that even after more than 10 days, as I haven’t touch the lens (and the lens hasn’t been mounted to the Sony body = battery or super-capacitor if there was any at all inside, must be exhausted) the focus still moves.   So, I further gave them an even harder test, “with 10 mm extension ring”. (photo top)

Z7+30Macro+10mm

On Nikon-Z7, the Sony SEL30m35 lens + 10 mm extension ring made quite a good close-up images and this was the closest I could go. (photo left)   And a bit more distance, lens worked almost on AF mode. (photo middle)  Then — while lens was kept aimed to dark object, I suddenly moved the lens (camera) to bright outside = the lens focus moved to far (photo right) then back  to very close.  M m m ? ? ? —– wait a moment, the LENS got 10 mm extension ring too.    How come the focus to far subject like the photo right here was possible ?    What kind of optics can override the 10 mm extension of the focus by a little movement of the lens ! ? ? ?    It’s incredible. 

Sony+10mm

So, I did test the same on Sony A7R body.   The result was as you can see on those photos.  = With 10 mm extension, the lens can give only very closed images (photo left) and the middle and the right photo.

With a bit of cynical view, this lens SEL30M35 (30mm Macro F3.5) can give more on the Nikon Z (with my special adapter) —– than on the genuine Sony body.   😀     What ever the Sony says, the lens keep move the focus while detecting the own position without power, as if its got own mind.  This must be their special technology used inside of this lens.   So, the mystery was not solved at all.   😀 

(Sony might got quite a confidence to ignore a funny question, even after the Canon and the Nikon came into the full frame mirrorless market, Sony’s share is still over 60%.)

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