diff --git a/app/jobs/image_processor_job.rb b/app/jobs/image_processor_job.rb
index 8017d2b35..798ba86a1 100644
--- a/app/jobs/image_processor_job.rb
+++ b/app/jobs/image_processor_job.rb
@@ -38,6 +38,9 @@ class ImageProcessorJob < ApplicationJob
     blob.attachments.each do |attachment|
       next unless attachment&.representable?
       attachment.representation(resize_to_limit: [400, 400]).processed
+      if attachment.blob.content_type.in?(RARE_IMAGE_TYPES)
+        attachment.variant(resize_to_limit: [2000, 2000]).processed
+      end
     end
   end
 
diff --git a/app/views/instructeurs/dossiers/pieces_jointes.html.haml b/app/views/instructeurs/dossiers/pieces_jointes.html.haml
index e3480d617..eb67f850c 100644
--- a/app/views/instructeurs/dossiers/pieces_jointes.html.haml
+++ b/app/views/instructeurs/dossiers/pieces_jointes.html.haml
@@ -19,7 +19,8 @@
             = render Attachment::ShowComponent.new(attachment: attachment, truncate: true)
 
           - elsif blob.variable? && blob.content_type.in?(AUTHORIZED_IMAGE_TYPES)
-            = link_to image_url(blob.url), title: "#{champ.libelle} -- #{blob.filename}", data: { src: blob.url }, class: 'gallery-link' do
+            - blob_url = blob.content_type.in?(RARE_IMAGE_TYPES) ? attachment.variant(resize_to_limit: [2000, 2000]).processed.url : blob.url
+            = link_to image_url(blob_url), title: "#{champ.libelle} -- #{blob.filename}", data: { src: blob.url }, class: 'gallery-link' do
               .thumbnail
                 = image_tag(attachment.variant(resize_to_limit: [400, 400]).processed.url, loading: :lazy)
                 .fr-btn.fr-btn--tertiary.fr-btn--icon-left.fr-icon-eye{ role: :button }
diff --git a/app/views/shared/champs/piece_justificative/_show.html.haml b/app/views/shared/champs/piece_justificative/_show.html.haml
index b32f05595..1624f86e1 100644
--- a/app/views/shared/champs/piece_justificative/_show.html.haml
+++ b/app/views/shared/champs/piece_justificative/_show.html.haml
@@ -16,7 +16,8 @@
                   = 'Visualiser'
 
           - elsif blob.variable? && blob.content_type.in?(AUTHORIZED_IMAGE_TYPES)
-            = link_to image_url(blob.url), title: "#{champ.libelle} -- #{blob.filename}", data: { src: blob.url }, class: 'gallery-link' do
+            - blob_url = blob.content_type.in?(RARE_IMAGE_TYPES) ? attachment.variant(resize_to_limit: [2000, 2000]).processed.url : blob.url
+            = link_to image_url(blob_url), title: "#{champ.libelle} -- #{blob.filename}", data: { src: blob.url }, class: 'gallery-link' do
               .thumbnail
                 = image_tag(attachment.variant(resize_to_limit: [400, 400]).processed.url, loading: :lazy)
                 .fr-btn.fr-btn--tertiary.fr-btn--icon-left.fr-icon-eye{ role: :button }
diff --git a/config/initializers/authorized_content_types.rb b/config/initializers/authorized_content_types.rb
index e5af1c74f..eaa16fbd9 100644
--- a/config/initializers/authorized_content_types.rb
+++ b/config/initializers/authorized_content_types.rb
@@ -15,6 +15,10 @@ AUTHORIZED_IMAGE_TYPES = [
   'image/vnd.dwg' # multimedia x 137 auto desk
 ]
 
+RARE_IMAGE_TYPES = [
+  'image/tiff' # multimedia x 3985
+]
+
 AUTHORIZED_CONTENT_TYPES = AUTHORIZED_IMAGE_TYPES + AUTHORIZED_PDF_TYPES + [
   # multimedia
   'video/mp4', # multimedia x 2075
diff --git a/spec/fixtures/files/pencil.tiff b/spec/fixtures/files/pencil.tiff
new file mode 100644
index 000000000..67af5a81a
Binary files /dev/null and b/spec/fixtures/files/pencil.tiff differ
diff --git a/spec/jobs/image_processor_job_spec.rb b/spec/jobs/image_processor_job_spec.rb
index e32999273..91d7de2c1 100644
--- a/spec/jobs/image_processor_job_spec.rb
+++ b/spec/jobs/image_processor_job_spec.rb
@@ -63,7 +63,6 @@ describe ImageProcessorJob, type: :job do
   end
 
   describe 'create representation' do
-    let(:file) { fixture_file_upload('spec/fixtures/files/logo_test_procedure.png', 'image/png') }
     let(:blob_info) do
       {
         filename: file.original_filename,
@@ -81,19 +80,35 @@ describe ImageProcessorJob, type: :job do
       blob
     end
 
-    context "when representation is not required" do
-      it "it does not create blob representation" do
-        expect { described_class.perform_now(blob) }.not_to change { ActiveStorage::VariantRecord.count }
+    context "when type image is usual" do
+      let(:file) { fixture_file_upload('spec/fixtures/files/logo_test_procedure.png', 'image/png') }
+
+      context "when representation is not required" do
+        it "it does not create blob representation" do
+          expect { described_class.perform_now(blob) }.not_to change { ActiveStorage::VariantRecord.count }
+        end
+      end
+
+      context "when representation is required" do
+        before do
+          allow(blob).to receive(:representation_required?).and_return(true)
+        end
+
+        it "it creates blob representation" do
+          expect { described_class.perform_now(blob) }.to change { ActiveStorage::VariantRecord.count }.by(1)
+        end
       end
     end
 
-    context "when representation is required" do
+    context "when type image is rare" do
+      let(:file) { fixture_file_upload('spec/fixtures/files/pencil.tiff', 'image/tiff') }
+
       before do
         allow(blob).to receive(:representation_required?).and_return(true)
       end
 
-      it "it creates blob representation" do
-        expect { described_class.perform_now(blob) }.to change { ActiveStorage::VariantRecord.count }.by(1)
+      it "creates a second variant" do
+        expect { described_class.perform_now(blob) }.to change { ActiveStorage::VariantRecord.count }.by(2)
       end
     end
   end