Making objective_lens a thing

app/templates/_scopes_table_card.html

@@ -8,10 +8,10 @@
     {{ mag(info.magnification_max) }}
   {%- endif -%}
 {%- endmacro -%}
-{%- macro magnification(info, objective_diameter_mm) -%}
+{%- macro magnification(info) -%}
   {%- set range = magnification_range(info) -%}
   {%- if range -%}
-    {{ range }}x{% if objective_diameter_mm is not none %}{{ mag(objective_diameter_mm) }}{% endif %}
+    {{ range }}x{% if info.objective_lens_diameter_mm is not none %}{{ mag(info.objective_lens_diameter_mm) }}{% endif %}
   {%- else -%}
     <span class="muted">—</span>
   {%- endif -%}
@@ -43,7 +43,7 @@
           <td>{{ scope.manufacturer.name if scope.manufacturer else "—" }}</td>
           <td>{{ scope.scope_model.name if scope.scope_model else "—" }}</td>
           <td>{{ scope.sub_part_type.name if scope.sub_part_type else "—" }}</td>
-          <td>{{ magnification(info, row.objective_diameter_mm) }}</td>
+          <td>{{ magnification(info) }}</td>
           <td>
             {% if info and info.objective_thread_pitch %}
               {{ info.objective_thread_pitch }}

app/templates/admin/augmented_part_detail.html

@@ -44,6 +44,12 @@
           {% else %}—{% endif %}
         </dd>
         <dt>Model suffix</dt><dd>{{ scope_info.model_suffix or "—" }}</dd>
+        <dt>Objective lens diameter</dt>
+        <dd>
+          {% if scope_info.objective_lens_diameter_mm is not none %}
+            {{ scope_info.objective_lens_diameter_mm }} mm
+          {% else %}—{% endif %}
+        </dd>
         <dt>Objective thread</dt><dd>{{ scope_info.objective_thread_pitch or "—" }}</dd>
       </dl>
     </div>