If you were to look at the product description on the TTArtisan's website, it says that the front inner barrel of the TTArtisan 40mm f/2.8 macro lens can be disassembled. I looked and searched online for their official instruction but couldn't find any. So feeling unsatisfied, I decided to seek an official TTArtisan answer by sending an e-mailed to them for clarification.
Less than 12 hours later, I got a reply from their "After-sales Customer Service" and this is what they say:
Dear chuahtc,
My name is Caitlin and in charge of after sales service.
For your question, here is related images：
Please take a compasses, press and hold these two points to rotate, it can be disassembled.
Anything unclear feel free to contact with me:)Best Regards,
Any issues, any ideas, if there's anything I can assist with, please don't hesitate to reach out.
With the front inner barrel removed, I began to wonder if fine dust particles would make its way into the internals of the lens. So, I sent them another e-mail and this is the reply:
Dear chuahtc,
The tiny dust particle may be easier to fall on the outside（surface）of the lens body, but you can wipe it, it is very difficult get inside the lens body.
Hope this information is helpful for you.
Best Regards,
Any issues, any ideas, if there's anything I can assist with, please don't hesitate to reach out.Caitlin
Pondering on what's being said, I think it makes sense - as long as I do not rotate the focusing ring either in or out as otherwise air will be sucked into the lens (acting like a pump).
Disclosure: I have not bought this lens yet. Thus, I have not had the opportunity to try things as described above. I am still at the evaluation stage, undecided on whether to go with TTArtisan 40mm or 7Artisans 60mm Mark I macro lens.
Disclaimer:
The information provided here is "as is". Try at your own risk and don't hold me responsible if anything breaks or malfunction.
Buy Raynox Or Nisi macro filters from Amazon.com
(Note: An Amazon.com affiliate link)
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