=====ZEISS SuperSpeed Distagon 18mm T1.3 MkI ===== 
{{ :lens:18mm-zeiss-super-speed-1.jpg?400|}}
==== Summary ====
ZEISS S35 MkI lenses have no iris gear
==== Tech Specs ====
| Manufacturer    |ZEISS|
| Series          |SuperSpeed MkI|
| Model           |Distagon|
| Focal Length    |18mm|
| Max Aperture    |T1.3|
| Min Aperture    |T16|
| Format          |Super 35|
| Image Circle    |-|
| Minimum Focus   |10 in.|
| Focus Rotation  |-|
| Iris Blades     |6|
| Optical Design  |-|
| Squeeze         |none|
| Front Diameter  |80mm|
| Filter Thread   |none|
| Focus/Zoom Rod  |n/a|
| Native Mount    |PL|
| Data Protocol   |none|
| Length          |3.5 in.|
| Weight          |1270 g|
| Body Telescope  |-|
| Body Material   |Aluminum|
| Focus Drive     |Manual|
| Iris Drive      |Manual|
| Zoom Drive      |n/a|
==== History ====
Country of Origin: Germany \\
Release Date: - \\
Launch Price: - \\
Design Revisions:\\

==== Service ====
<nodisp 8>
Known Issues: \\
<wrap note>**CAUTION** element behind iris blades is an asphere which is a plastic deposit on the surface of the element. This plastic can be ruined with too much cleaning, avoid when possible. If image blooms, most likely the edges of the asphere are starting to peel up and separate from the element. To confirm, stop down to see if the blooming goes away. There is no remedy and replacements are EXTREMELY rare.\\
Image shift: If shift is due to loose threads, spray and bake will reduce it. \\
If shift is due to the iris (will shift on the video collimator when the iris is rotated), this is due to spherical aberration and cannot be corrected. Is inherent in the design of the lens.</wrap>\\
Service Manual: [[staff:servicedb:ZeissT1.3|Disassembly/Re-assembly]] \\
\\
Full CLA: **6-7hrs.**\\
<wrap note>18mm & 25mm had floating element so slightly more time is required for dis-assembly than the rest of the focal lengths. </wrap>\\
Element compatibility (T1.3s & T1.4s):
<wrap note>18mm T1.3 & T1.4 elements are the same and can be swapped. confirm housing compatibility first though.</wrap>\\
Replace front or rear elements (not mounted) only: **1 hr. ea.**\\
<wrap note>rear elements must be cut from housing and re-potted with epoxy</wrap>\\					
Strip and re-paint rear housing: **+1 hr** if getting other service work or **2 hrs** if no other service is included. (A full C+L should generally be recommended for S&R of the rear housing.)\\							
Spray and bake threads (teflon coating): **+1 hr.**\\
<wrap note> requires full CLA to access</wrap>\\
Re-anodize front ring: **$50**\\				
Image shift: \\
<wrap note>If shift is due to loose threads, spray and bake will reduce it. \\
If shift is due to the iris (will shift on the video collimator when the iris is rotated), this is due to spherical aberration and cannot be corrected. Is inherent in the design of the lens. </wrap>				
</nodisp>

==== Notes ====
In a nutshell…\\
MkI: Arri PL Mount, Knurled iris grip (no gear), Factory focus gear, Half focus rotation (appx 180°), T1.3 maximum aperture, Metric and Imperial focus marks\\
MKI expanded: Arri PL Mount, Knurled iris grip (no gear), Factory focus gear, Full focus rotation, T1.3 maximum aperture, Metric and Imperial focus marks\\
MkII: Arri PL Mount, Factory iris gear, Factory focus gear, Full focus rotation, T1.3 maximum aperture, Metric and Imperial focus marks\\
MkIII: Arri PL Mount, Factory iris gear, Factory focus gear, Full focus rotation, T1.3 maximum aperture, Metric OR Imperial focus marks (not both), Focus marks upright when in operating position\\
[[https://thecinelens.com/2016/08/24/whats-in-a-name-a-guide-to-zeiss-super-speeds/]]
==== Media ====