Sigma 70-200mm f/2.8 APO EX DG OS HSM - how to clean the lens inside

This video is about cleaning the inside of the Sigma 70-200mm f/2.8 APO EX DG OS HSM lens. Recently I had this lens which had dust behind the front lens elements, and to clean it I had to remove the front lens element, clean the lens inside, then assemble the lens.

UPDATES: n/a

TIMESTAMPS:
- 00:00 Intro
- 00:41 Tools
- 01:04 Like, sub, donate
- 01:33 Disassembly
- 05:12 Clean
- 09:05 Assembly
- 12:56 Outro

RELATED VIDEOS:
- Cleaning lenses: https://www.youtube.com/playlist?list=PLsYnsrzyh_mOXni_Xn3mzZlFV6tu0C8m8
- Canon EF 70-200mm f4 L USM - how to clean the lens inside: https://youtu.be/IB8nE6snT-Q
- Tamron 70-200mm f2.8 AF LD Di SP (IF) MACRO A001 cleaning the lens inside: https://youtu.be/MZu_U1WeUT4

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TOOLS I USED (ebay | aliexpress link):
- PH000 screwdriver: http://ebay.us/Dz8nTA | https://ali.ski/2e8ZaZ
- Plastic spudger: http://ebay.us/JQLobF | https://ali.ski/7RsFU
- Plastic tweezers: http://ebay.us/cqv5TP | https://ali.ski/kLGAr-
- Air blower: http://ebay.us/XPC6wo | https://ali.ski/-Yc1r2
- Lens cleaning fluid: http://ebay.us/WXS3GC | https://ali.ski/MYvYl
- Microfiber cloth: http://ebay.us/YpEifd | https://ali.ski/6CzC7
- Small brush: http://ebay.us/R54Rjh | https://ali.ski/LEV6Sk
- Flashlight: http://ebay.us/1ouZGD | https://ali.ski/lr1QH

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