Error 30 with an EOS 50 D

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An avid reader
An avid reader Regular Member • Posts: 193
Error 30 with an EOS 50 D

So I bought a secondhand 17-40, 4.0 lens and the seller was so kind to send along a malfunctioning eos 50d. When you press the shutter button it says error 30. Is it there an easy fix for this issue? I do have a eos 30d.... Any suggestions would be helpful.

 An avid reader's gear list:An avid reader's gear list
Fujifilm X-T1 Sony a6300 Sony a6600 Sony E 50mm F1.8 OSS Sigma 30mm F2.8 DN | A +9 more
Canon EOS 30D Canon EOS 50D
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