Attaching dslr to telescope

[Dave grim]

Hi guys I don't know if I'm being a bit silly here but when attach a dslr to a telescope with all the assorted extensions and a field flattener is it best to rack the focuser all the way in or do you leave at say half way so you have the same amount of movement each way to get the focus right

Cheers

Dave

[ronin]

Not going to make any difference. You will attach everything necessary then adjust the focus to get a sharp image, whether that is all the way in, all the way out or in the middle is down to the bits and the focal plane. You cannot choose.

[RedSpot]

It will depend entirely on the telescope and the amount of focuser travel that it has.  It's really just a matter of using the telescope focuser in the same manner that you would when using a manual focus telephoto lens.  Ultimately, that's kind of all it is.

[skywatcher58gb]

Hi Why not try setting everything up in the daytime and focus on some distant object and take a few shots, this way you will see how all the bits fit and give you some practice in daylight before doing it in the dark.

[michael8554]

Since DSLR's are heavy beasts, try to attach it as close to the scope as you can, with just enough focus left to adjust, to minimise flexing.

If your scope normally has a star diagonal and you can't reach focus with the DSLR attached instead, you will have to attach some extension tubes. 

Michael

[RT65CB-SWL]

As per 'skywatcher58gb' says: "...try setting everything up in the daytime and focus on some distant object and take a few shots, this way you will see how all the bits fit and give you some practice..."

I find it is more frustrating in the winter months, and batteries in the cold when don't hold the charge for long.