Prime focus on Meade LXD75 6" Newtonian
Posted 19 November 2012 - 07:35 AM
My first post here. I just bought myself a second hand Meade LXD75 6" Newtonian (762mm f/5 152mm apert.) and I am wondering if Prime focus using a DSLR can be achieved with the stock Focuser. I have a Standard T-Ring + 1.25" nose and as far as I can see I have 2 ways to attach this to focuser; First would be with the 1.25" adapter ring already on the Focuser tube or without (without reduces the distance from DSLR to secondary mirror by 55-60mmm i think)
I done some tests already but the conditions were pretty bad to judge results.
Any advice would be appreciated.
Posted 19 November 2012 - 08:15 AM
Posted 19 November 2012 - 08:26 AM
One way to find out is focus on a terrestrial object. An extension tube may be needed.
Thank you for quick reply, how far would this object need to be however?
Posted 19 November 2012 - 01:27 PM
This is my SN6 fitted with a DSLR. The geometry of the N6 is exactly the same.
Posted 19 November 2012 - 02:34 PM
Posted 19 November 2012 - 03:03 PM
Posted 20 November 2012 - 04:42 AM
Posted 20 November 2012 - 08:46 AM
This is a picture if my original N6 configured for visual with a DSX-90 mounted on its back. (This scope eventually became my guide scope for imaging.) If you look closely at the lower end of the telescope tube you can see the extension. You can also see how far in the focuser draw tube is.
Posted 20 November 2012 - 11:01 AM
Posted 25 November 2012 - 02:05 AM