===== Richard Gale Optics Clavius 28mm f/2 (T2.3) ===== 
{{ :lens:clavius-28mm.png?direct&400|}}
==== Summary ====
If you enjoy DSO's Trump primes, you'll love these new Clavius primes. Originally vintage Apogee glass, DSO has rehoused these updated versions with both geared and marked focus and iris rings in a more durable body. With all internal focus adjustments, the Clavius primes will cover Full Frame/VV sensors with an ultra flarey, low-constrast aesthetic, and their unique aperture disk inserts now offer even more options, including the loved anamorphic bokeh and new colored efx.
==== Tech Specs ====
| Manufacturer    |Richard Gale Optics|
| Series          |Spherical|
| Model           |Clavius|
| Focal Length    |28mm|
| Max Aperture    |f/2 (T2.3)|
| Min Aperture    |f/16|
| Format          |-|
| Image Circle    |43.5mm|
| Minimum Focus   |15in|
| Focus Rotation  |°|
| Iris Blades     |-|
| Optical Design  |-|
| Squeeze         |-|
| Front Diameter  |95mm|
| Filter Thread   |-|
| Focus/Zoom Rod  |-|
| Native Mount    |PL|
| Data Protocol   |-|
| Length          |5in|
| Weight          |1.8kg|
| Body Telescope  |-|
| Body Material   |-|
| Focus Drive     |Manual|
| Iris Drive      |Manual|
| Zoom Drive      |n/a|
==== History ====
Country of Origin: - \\
Release Date: 2018 \\
Launch Price: - \\
Design Revisions:\\
==== Service ====
<nodisp 8>
Service Manual: (Insert link to manual here) \\
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Full CLA: **10-12hrs.**\\
<wrap note>Brackets on outside of lens are they keys. Loosen, adjust and secure with 3-bond. Scales and labels are plastic, will melt with acetone. Front ring held on using pointed set screws into delrin interior housing, no drilled dimples. </wrap>\\
Re-collimate: **2-3hrs.**\\
<wrap note>cannot shim under the mount. Instead, shim under rear element. this will change where the locating dots line up. Reposition dots when re-collimating. Dots allow lens user to confirm that the rear optics screw into the correct dept when swapping the bokeh plate underneath. If the dept is off, the collimation will be off. </wrap>\\
Misaligned/oily IBs: **12-13hrs.**\\
<wrap note> *Disclaimer: IBs MAY be accessed to repair but repair must be attempted to confirm. In some cases, the IBs can be accessed, in others it cannot. Front optics may unscrew from housing (after large dis-assembly). Once removed, iris retaining clip ring can be accessed to get to IBs. Front optical group is sometimes help in by a set screw. If so, rear housing (which is exoxoed into place) must be removed to access set screw. If this is true, do not proceed with repair. If set screw is missing, optical group will unscrew from lens. </wrap>\\
As of May 2024, we do not offer service.\\
</nodisp>
==== Notes ====
==== Media ====