final exposure longer than set

[ceararizona]

hello, BYN is adding a second or two to the final exposures of my pictures. I noticed that when I set length to 120s to 300s pictures it adds 1s. Last night I took 900s pictures and they came out as 902s pictures. It happens to both lights and darks, keeping them at the same length. It doesn’t affect the final result but I thought you should know (and you may already be aware of it). I am using a Nikon D600 (modified), windows 10, phd2. That doesn't seem to happen when I use my Nikon D750 (unmodified). 

[admin]

This is like that since day 1... good observation on your part.

This is actually caused by Windows timers not being 100% accurate sadly... and their ability to fire in time due to resource contentions.

For Canon cameras it s little bit different because The Canon SDK will actually fire an event when the BULB capture is terminated so BYE can listen to this event and terminate the capture just in time.

Regards,