Why does a single frame NOT GUARANTEE the shutter to work?

The main mistake of an inexperienced buyer at an Avito meeting is to take 1-2 single frames and see the image on the screen and give the money. However, a tired shutter with weakened springs or loss of lubrication at single shutter speeds It works fine, but **in continuous shooting it starts to jam or give dark stripes**.

As a service engineer, I will teach you the proper technique for stress testing your gate actuator.

Algorithm for checking burst shooting upon purchase

1. Step 1: Switch the drive mode to High Continuous (Hi/CH).
2. Step 2: Set the shutter speed to 1/500 sec and ISO 400.Do not test the series at long shutter speeds (1/10 sec) - they lubricate the operating interval of the curtains.
3. Step 3: Press the shutter button for 3-4 seconds (a series of 20-30 frames).Listen to the rhythm of work shutter The sound should be smooth, like a machine gun, without interruptions in rhythm, rushing tempo and screeching of the electric motor.
4. Step 4: View the resulting series on the screen.There should be no darkness in any frame horizontal stripes (curtains sticking) or a black screen (mirror freezing).

Checking the last frame of a series for mileage

Upload the last frame from the filmed series to our online service. Make sure the EXIF counter has increased by exactly the number taken frames in a series, without skipping or freezing the processor.