DSLR piggy back on main image train

[sinbad40]

Just a quick question.  I was thinking of putting my old DSLR piggybacked on top of my image scope, so it takes a wide field of the area i am imaging through the scope.  As its an old Nikon D80 that can only take 30s subs when controlled via the PC, would the shutter opening and closing cause any issues, vibration etc while the main camera is doing 300s images.  the telescope image train is either a 900 or 510 focal length depending on which would be in use, and don't think it would be an issue, maybe if it was an sct or something it may.

[Bugdozer]

Based on how much my comparable D90 shakes the my scope when it's physically attached, the shake from it will only last for about one second, so on an exposure of a couple of minutes, you wont get any detectable effect from it. Unless you have a really wobbly mount. 

[sinbad40]

56 minutes ago, Bugdozer said:

Based on how much my comparable D90 shakes the my scope when it's physically attached, the shake from it will only last for about one second, so on an exposure of a couple of minutes, you wont get any detectable effect from it. Unless you have a really wobbly mount. 

Thanks for that, I didn't think it would be an issue.  When i give it a try, i will monitor the first few images from the main camera, make sure that its not doing any harm, just in case.