SIGMA - Sigma 421DN17 Parts
Comprehensive parts documentation for the Sigma 421DN17 28mm F/1.8 Aspherical lens for Nikon AF digital SLR cameras. This workshop manual provides detailed technical drawings and a complete parts list essential for servicing and maintaining this professional-grade optical assembly. The first page presents a full exploded view showing the lens groups, focusing rings, and all mounting elements in proper assembly sequence. Page 3 includes a schematic diagram clarifying the internal layout and key functional relationships of the lens structure. The parts catalog identifies 11 primary components by reference number, English and Japanese name, and quantity per assembly — covering the lens hood (429M205), name ring, spacer ring, mounting screws, hood adapter ring, scale rubber ring, focus barrel unit (main subassembly), 2nd group lens unit, cover ring unit, and other critical optical and mechanical components. This manual serves maintenance technicians, optical specialists, and lens repair professionals needing precise component identification and assembly knowledge for the 421DN17 system.
Documentation must be downloaded on a computer (PC, Mac, or Linux).
Do not use a smartphone or tablet to download documentation; they generally lack sufficient memory capacity to handle large files, and few users know how to locate the download folder on these devices.
Once downloaded, you can use it right away and even print the pages you need, or use your smartphone in photo mode to translate into the language of your choice: Google Translate
Document Details
- Format
- Pages
- 9
- Size
- 354.9 KB
- Category
- Photography