Prime Focus with a Barlow

[JohnnyD333]

Hi all,

I have been doing prime focus astrophotography for about a year now. My Newt has the convienient feature of a thread that can directly screw onto my T-Ring, thus eliminating the need for a T-Adapter. After taking many images, I was ready for a bigger scope. But I read of many people using Barlows with a T-Adapter which I assume gives more magnification. At this point, my Prime Focus gives me about 25x magnification directly attached to the scope. If I get a T-Adapter, use the 2x barlow which I already own, and take images would I get descent results. Im imaging at F5, so will this increase my Focal Ratio significantly with the barlow and will I be able to reach enough inward focus (common Newt issue). Im using a Celestron C6 Newtonian, any input is appreciated. Thanks again, and hopefully we get clear skies sometime in our lives:icon_salut:

[Stephen]

It will take your focal ratio to F10 and you should have no problem with inward focus, Barlows push the focal point out!

[JohnnyD333]

Thanks Kh3ldar for the correction, now Im just a little worried about imaging at F10, seems a little slow for a DSLR but Ill do some more research. Thanks again

[Obi Wan Ken00bi]

Hey Johnny, we have a similar setup, I wonder if you ever got to use a barlow on your c6. I also really like to use the t2 feature of the c6, but would also like to try doubling or even tripling my 26 x magnification...