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03-07-2019, 03:44 AM   #1
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Barrel distortion M* 300 on A7III

Total newby here. I just purchased a SMC M*300 F4 and I'm getting a huge amount of distortion on my A7iii. I'm using a K&F converter which works perfectly with a FA 50mm Macro.

Am I doing something wrong? Is it like this with all telephoto lenses? Help!

Dropbox - LRG__DSC1817.JPG

03-07-2019, 04:46 AM   #2
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Something is wrong. Maybe the lens was reassembled with one or more elements reversed.
03-07-2019, 07:15 AM   #3
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Can you find a Pentax SLR or dSLR to check with the 300?
03-07-2019, 07:52 AM   #4
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Something very wrong with the lens. I would send back if possible.

This is what it should look like:

03-07-2019, 09:08 AM   #5
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I can see now why it was on a relatively inexpensive 250€. No mention of distortion though so this is when PayPal protection comes in handy.

I was wondering if it has any artistic value whatsoever. Maybe I should keep it for a discount?

Thanks for all replies. I'll try it out on a friend's Pentax SLR but I reckon it will be faulty too.

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