diff --git a/src/ophyd_async/core/_detector.py b/src/ophyd_async/core/_detector.py
index ca9f756fe6..adea471475 100644
--- a/src/ophyd_async/core/_detector.py
+++ b/src/ophyd_async/core/_detector.py
@@ -98,6 +98,9 @@ class TriggerInfo(ConfinedModel):
     number_of_events: NonNegativeInt = Field(default=1)
     """Number of bluesky events that will be emitted, (0 means infinite)."""
 
+    images_per_exposure: PositiveInt = Field(default=1)
+    """Number of frames the detector should produce for every trigger sent to it."""
+
     exposure_timeout: float = Field(
         default_factory=lambda d: d["livetime"] + d["deadtime"] + DEFAULT_TIMEOUT,
         gt=0,
@@ -166,10 +169,11 @@ async def prepare_internal(self, num: int, livetime: float, deadtime: float):
         """
         raise NotImplementedError(self)
 
-    async def prepare_edge(self, num: int, livetime: float):
+    async def prepare_edge(self, num: int, images_per_exposure: int, livetime: float):
         """Prepare the detector to take external edge triggered exposures.
 
         :param num: the number of exposures to take
+        :param images_per_trigger: the number frames each exposure should produce
         :param livetime: how long the exposure should be, 0 means what is currently set
         """
         raise NotImplementedError(self)
@@ -601,6 +605,7 @@ async def prepare(self, value: TriggerInfo) -> None:
                 case DetectorTrigger.EXTERNAL_EDGE:
                     await self._trigger_logic.prepare_edge(
                         num=value.number_of_exposures,
+                        images_per_exposure=value.images_per_exposure,
                         livetime=value.livetime,
                     )
                 case DetectorTrigger.EXTERNAL_LEVEL:
diff --git a/src/ophyd_async/epics/adandor.py b/src/ophyd_async/epics/adandor.py
index 5e1feef409..9c1ef01126 100644
--- a/src/ophyd_async/epics/adandor.py
+++ b/src/ophyd_async/epics/adandor.py
@@ -77,7 +77,7 @@ async def prepare_internal(self, num: int, livetime: float, deadtime: float):
         await self.driver.trigger_mode.set(Andor2TriggerMode.INTERNAL)
         await prepare_exposures(self.driver, num or _MAX_NUM_IMAGE, livetime, deadtime)
 
-    async def prepare_edge(self, num: int, livetime: float):
+    async def prepare_edge(self, num: int, images_per_exposure, livetime: float):
         await self.driver.trigger_mode.set(Andor2TriggerMode.EXT_TRIGGER)
         await prepare_exposures(self.driver, num or _MAX_NUM_IMAGE, livetime)
 
diff --git a/src/ophyd_async/epics/adaravis.py b/src/ophyd_async/epics/adaravis.py
index 695c78e886..f156b05db1 100644
--- a/src/ophyd_async/epics/adaravis.py
+++ b/src/ophyd_async/epics/adaravis.py
@@ -75,7 +75,7 @@ async def prepare_internal(self, num: int, livetime: float, deadtime: float):
         await self.driver.trigger_mode.set(OnOff.OFF)
         await prepare_exposures(self.driver, num, livetime, deadtime)
 
-    async def prepare_edge(self, num: int, livetime: float):
+    async def prepare_edge(self, num: int, images_per_exposure, livetime: float):
         # Trigger on the rising edge of Line1
         # trigger mode must be set first and on its own!
         # Hardware race condition in Aravis firmware requires setting trigger mode
diff --git a/src/ophyd_async/epics/adkinetix.py b/src/ophyd_async/epics/adkinetix.py
index ca855bb581..68ce9eeb37 100644
--- a/src/ophyd_async/epics/adkinetix.py
+++ b/src/ophyd_async/epics/adkinetix.py
@@ -75,7 +75,7 @@ async def prepare_internal(self, num: int, livetime: float, deadtime: float):
         await self.driver.trigger_mode.set(KinetixTriggerMode.INTERNAL)
         await prepare_exposures(self.driver, num, livetime, deadtime)
 
-    async def prepare_edge(self, num: int, livetime: float):
+    async def prepare_edge(self, num: int, images_per_exposure, livetime: float):
         await self.driver.trigger_mode.set(KinetixTriggerMode.EDGE)
         await prepare_exposures(self.driver, num, livetime)
 
diff --git a/src/ophyd_async/epics/admerlin.py b/src/ophyd_async/epics/admerlin.py
index 0ace7baa64..0a7ae0a570 100644
--- a/src/ophyd_async/epics/admerlin.py
+++ b/src/ophyd_async/epics/admerlin.py
@@ -103,7 +103,7 @@ async def prepare_internal(self, num: int, livetime: float, deadtime: float):
         await self.driver.trigger_mode.set(MerlinTriggerMode.INTERNAL)
         await prepare_exposures(self.driver, num, livetime, deadtime)
 
-    async def prepare_edge(self, num: int, livetime: float):
+    async def prepare_edge(self, num: int, images_per_exposure, livetime: float):
         # Is this the right trigger mode?
         await self.driver.trigger_mode.set(MerlinTriggerMode.TRIGGER_START_RISING)
         await prepare_exposures(self.driver, num, livetime)
diff --git a/src/ophyd_async/epics/adpilatus.py b/src/ophyd_async/epics/adpilatus.py
index a5209a0276..15e6099c4f 100644
--- a/src/ophyd_async/epics/adpilatus.py
+++ b/src/ophyd_async/epics/adpilatus.py
@@ -116,7 +116,7 @@ async def prepare_internal(self, num: int, livetime: float, deadtime: float):
         await self.driver.trigger_mode.set(PilatusTriggerMode.INTERNAL)
         await prepare_exposures(self.driver, num or _MAX_NUM_IMAGE, livetime, deadtime)
 
-    async def prepare_edge(self, num: int, livetime: float):
+    async def prepare_edge(self, num: int, images_per_exposure, livetime: float):
         await self.driver.trigger_mode.set(self.edge_trigger_mode)
         await prepare_exposures(self.driver, num or _MAX_NUM_IMAGE, livetime)
 
diff --git a/src/ophyd_async/epics/advimba.py b/src/ophyd_async/epics/advimba.py
index f6afd41ba9..17bac5b4a7 100644
--- a/src/ophyd_async/epics/advimba.py
+++ b/src/ophyd_async/epics/advimba.py
@@ -116,7 +116,7 @@ async def prepare_internal(self, num: int, livetime: float, deadtime: float):
         )
         await prepare_exposures(self.driver, num, livetime, deadtime)
 
-    async def prepare_edge(self, num: int, livetime: float):
+    async def prepare_edge(self, num: int, images_per_exposure, livetime: float):
         await asyncio.gather(
             self.driver.trigger_mode.set(OnOff.ON),
             self.driver.exposure_mode.set(VimbaExposeOutMode.TIMED),
diff --git a/src/ophyd_async/fastcs/eiger/_trigger_logic.py b/src/ophyd_async/fastcs/eiger/_trigger_logic.py
index e4f7a14c57..f4fd458b71 100644
--- a/src/ophyd_async/fastcs/eiger/_trigger_logic.py
+++ b/src/ophyd_async/fastcs/eiger/_trigger_logic.py
@@ -10,11 +10,13 @@ async def _prepare_detector(
     detector: EigerDetectorIO,
     trigger_mode: EigerTriggerMode,
     num: int,
+    images_per_exposure: int,
     livetime: float = 0.0,
 ):
     coros = [
         detector.trigger_mode.set(trigger_mode),
-        detector.nimages.set(num),
+        detector.ntrigger.set(num),
+        detector.nimages.set(images_per_exposure),
     ]
     if livetime:
         coros += [
@@ -33,10 +35,14 @@ def get_deadtime(self, config_values: SignalDict) -> float:
         return 0.0001
 
     async def prepare_internal(self, num: int, livetime: float, deadtime: float):
-        await _prepare_detector(self.detector, EigerTriggerMode.INTERNAL, num, livetime)
+        await _prepare_detector(
+            self.detector, EigerTriggerMode.INTERNAL, 1, num, livetime
+        )
 
-    async def prepare_edge(self, num: int, livetime: float):
-        await _prepare_detector(self.detector, EigerTriggerMode.EDGE, num, livetime)
+    async def prepare_edge(self, num: int, images_per_exposure: int, livetime: float):
+        await _prepare_detector(
+            self.detector, EigerTriggerMode.EDGE, num, images_per_exposure, livetime
+        )
 
     async def prepare_level(self, num: int):
-        await _prepare_detector(self.detector, EigerTriggerMode.GATE, num)
+        await _prepare_detector(self.detector, EigerTriggerMode.GATE, 1, num)
diff --git a/src/ophyd_async/fastcs/jungfrau/_trigger_logic.py b/src/ophyd_async/fastcs/jungfrau/_trigger_logic.py
index b06ae1f7cc..6bc7ea1cb0 100644
--- a/src/ophyd_async/fastcs/jungfrau/_trigger_logic.py
+++ b/src/ophyd_async/fastcs/jungfrau/_trigger_logic.py
@@ -104,7 +104,7 @@ async def prepare_internal(self, num: int, livetime: float, deadtime: float):
                 self.detector, JungfrauTriggerMode.INTERNAL, num, livetime, deadtime
             )
 
-    async def prepare_edge(self, num: int, livetime: float):
+    async def prepare_edge(self, num: int, images_per_exposure, livetime: float):
         acquisition_type = await get_and_reset_acquisition_type(self.acquisition_type)
         if acquisition_type == AcquisitionType.PEDESTAL:
             raise ValueError(
diff --git a/tests/unit_tests/core/test_standard_detector.py b/tests/unit_tests/core/test_standard_detector.py
index 0c9b9ab814..1fbf6315aa 100644
--- a/tests/unit_tests/core/test_standard_detector.py
+++ b/tests/unit_tests/core/test_standard_detector.py
@@ -63,7 +63,7 @@ async def prepare_internal(self, num: int, livetime: float, deadtime: float):
         self.trigger = DetectorTrigger.INTERNAL
         self.num, self.livetime, self.deadtime = num, livetime, deadtime
 
-    async def prepare_edge(self, num: int, livetime: float):
+    async def prepare_edge(self, num: int, images_per_exposure, livetime: float):
         self.trigger = DetectorTrigger.EXTERNAL_EDGE
         self.num, self.livetime = num, livetime
 
@@ -1071,7 +1071,7 @@ async def test_trigger_logic_not_implemented_errors():
         await logic.prepare_internal(1, 0.1, 0.01)
 
     with pytest.raises(NotImplementedError):
-        await logic.prepare_edge(1, 0.1)
+        await logic.prepare_edge(1, 1, 0.1)
 
     with pytest.raises(NotImplementedError):
         await logic.prepare_level(1)
diff --git a/tests/unit_tests/fastcs/eiger/test_eiger_detector.py b/tests/unit_tests/fastcs/eiger/test_eiger_detector.py
index 2570f72f28..f6b624394a 100644
--- a/tests/unit_tests/fastcs/eiger/test_eiger_detector.py
+++ b/tests/unit_tests/fastcs/eiger/test_eiger_detector.py
@@ -40,6 +40,7 @@ async def test_prepare_internal_calls_correct_parameters(
         detector,
         [
             call.detector.trigger_mode.put(EigerTriggerMode.INTERNAL),
+            call.detector.ntrigger.put(1),
             call.detector.nimages.put(10),
             call.detector.count_time.put(0.1),
             call.detector.frame_time.put(0.1),
@@ -57,6 +58,69 @@ async def test_prepare_internal_calls_correct_parameters(
     )
 
 
+async def test_prepare_edge_calls_correct_parameters(detector: EigerDetector, tmp_path):
+    await detector.prepare(
+        TriggerInfo(
+            number_of_events=10,
+            images_per_exposure=5,
+            livetime=0.1,
+            trigger=DetectorTrigger.EXTERNAL_EDGE,
+        )
+    )
+    assert_has_calls(
+        detector,
+        [
+            call.detector.trigger_mode.put(EigerTriggerMode.EDGE),
+            call.detector.ntrigger.put(10),
+            call.detector.nimages.put(5),
+            call.detector.count_time.put(0.1),
+            call.detector.frame_time.put(0.1),
+            call.od.acquisition_id.put(""),
+            call.od.file_prefix.put("filename"),
+            call.od.file_path.put(str(tmp_path)),
+            call.od.fp.data_compression.put("BSLZ4"),
+            call.od.fp.data_datatype.put("uint16"),
+            call.od.fp.frames.put(0),
+            call.od.block_size.put(100000),
+            call.pixel_mask.put(str(tmp_path / "filename_meta.h5") + "//mask"),
+            call.od.fp.start_writing.execute(),
+            call.arm_when_ready.execute(),
+        ],
+        reset_after=False,
+    )
+
+
+async def test_prepare_level_calls_correct_parameters(
+    detector: EigerDetector, tmp_path
+):
+    await detector.prepare(
+        TriggerInfo(
+            number_of_events=10,
+            livetime=0.1,
+            trigger=DetectorTrigger.EXTERNAL_LEVEL,
+        )
+    )
+    assert_has_calls(
+        detector,
+        [
+            call.detector.trigger_mode.put(EigerTriggerMode.GATE),
+            call.detector.ntrigger.put(1),
+            call.detector.nimages.put(10),
+            call.od.acquisition_id.put(""),
+            call.od.file_prefix.put("filename"),
+            call.od.file_path.put(str(tmp_path)),
+            call.od.fp.data_compression.put("BSLZ4"),
+            call.od.fp.data_datatype.put("uint16"),
+            call.od.fp.frames.put(0),
+            call.od.block_size.put(100000),
+            call.pixel_mask.put(str(tmp_path / "filename_meta.h5") + "//mask"),
+            call.od.fp.start_writing.execute(),
+            call.arm_when_ready.execute(),
+        ],
+        reset_after=False,
+    )
+
+
 async def test_deadtime_correct(detector: EigerDetector):
     supported_triggers, deadtime = await detector.get_trigger_deadtime()
     assert supported_triggers == {