Hi Dennis,
I really do appreciate all your help on this,
obviously I have to keep more accurate records in future. As for using the 3x Barlows lens for the shot, that would make sense as this is my first choice for Double on this instrument. I did tweek the image in Maxim DL but I think I only used a little bit of wavelet filter which made it brighter? but beside strech (brightness/contrast), that was it, I have not touched it in photoshop CS3 yet as I didn't think it needed it.
The only other double I have imaged over the months like this is Antares but I checked all these images and they don't match the date or time of this shot.
Next time Sirius is up and I'm up and the skies are clear I will get another few more shots, one good colour RGB shot would be nice.
Rod