diff --git a/src/pymmcore_widgets/_mda/_channel_table_widget.py b/src/pymmcore_widgets/_mda/_channel_table_widget.py
index bcd6298a7..e495dc9fe 100644
--- a/src/pymmcore_widgets/_mda/_channel_table_widget.py
+++ b/src/pymmcore_widgets/_mda/_channel_table_widget.py
@@ -209,7 +209,7 @@ def _pick_first_unused_channel(self, channel_group: str) -> str:
         return available[0]
 
     def _create_spinbox(
-        self, range: tuple[int, int], double: bool = False
+        self, range: tuple[int | float, int | float], double: bool = False
     ) -> QDoubleSpinBox:
         dspinbox = QDoubleSpinBox() if double else QSpinBox()
         dspinbox.setButtonSymbols(QAbstractSpinBox.ButtonSymbols.NoButtons)
@@ -249,8 +249,7 @@ def _create_new_row(self, channel: useq.Channel | None = None) -> None:
         channel_combo.setCurrentText(channel.config)
 
         # exposure spinbox
-        channel_exp_spinbox = self._create_spinbox((0, 10000), True)
-        channel_exp_spinbox.setMinimum(1)
+        channel_exp_spinbox = self._create_spinbox((0.01, 999999), True)
         channel_exp_spinbox.setValue(channel.exposure or self._mmc.getExposure() or 100)
 
         # z offset spinbox
diff --git a/src/pymmcore_widgets/useq_widgets/_channels.py b/src/pymmcore_widgets/useq_widgets/_channels.py
index 13741b4f7..a9de33eaa 100644
--- a/src/pymmcore_widgets/useq_widgets/_channels.py
+++ b/src/pymmcore_widgets/useq_widgets/_channels.py
@@ -30,7 +30,7 @@ class ChannelTable(DataTableWidget):
     # fmt: off
     GROUP = TextColumn(key="group", default=DEFAULT_GROUP, hidden=True)
     CONFIG = TextColumn(key="config", default=None, is_row_selector=True)
-    EXPOSURE = FloatColumn(key="exposure", header="Exposure [ms]", default=100.0, minimum=1)  # noqa
+    EXPOSURE = FloatColumn(key="exposure", header="Exposure [ms]", default=100.0, minimum=0.01)  # noqa
     ACQUIRE_EVERY = IntColumn(key="acquire_every", default=1, minimum=1)
     DO_STACK = BoolColumn(key="do_stack", default=True)
     Z_OFFSET = FloatColumn(key="z_offset", default=0.0, minimum=-10000, maximum=10000)
diff --git a/src/pymmcore_widgets/useq_widgets/_column_info.py b/src/pymmcore_widgets/useq_widgets/_column_info.py
index a64f0d080..2435ca6bc 100644
--- a/src/pymmcore_widgets/useq_widgets/_column_info.py
+++ b/src/pymmcore_widgets/useq_widgets/_column_info.py
@@ -263,7 +263,7 @@ class TableDoubleSpinBox(_TableSpinboxMixin, QDoubleSpinBox):
 class _RangeColumn(WidgetColumn, Generic[W, T]):
     data_type: WdgGetSet[W, float]
     minimum: float = 0
-    maximum: float = 10_000
+    maximum: float = 999_999
 
     def _init_widget(self) -> W:
         wdg = self.data_type.widget()