[dugnsuz (Doug)]

Originally Posted by marc4darkskies

Verrry nice Doug!! An excellent rendition!

Cheers, Marcus

Thanks Marcus - nice when a new toy lives up to one's expectations.

Originally Posted by Dennis

Hi Doug

I used a custom mask designed and sourced my H0ughy for my Vixen 102mm refractor – it is a little oversize for the Canon lens but it hangs on the 400mm F5.6L lens hood by a thin foam ring that I glued onto the mask. If I remember correctly, I had to choose a bright star (at least Mag 1) and used Remote Live View fully zoomed in.

I tried the same mask on my 70-200mm F4L and had a little difficulty as the spikes were quite small in extent, but after I took a 30 second image and downloaded it, I could see that that focus was good as can be seen in the attached 40D full frame shot, down-sampled to 800x533 pixels.

I know that Ron at Sirius Optics sells Farpoint Bahtinov Masks with the smallest size covering the range 2.5" - 4.5". These have x3 locating screws at 120 degrees located in slots at the outer edge that can slide in/out radially, so the mask will fit snugly on the lens hood.

I guess that once you have used Remote Live View zoomed in, it would be best to then take say, a 5 sec shot, download it and inspect it full size to confirm best focus?

Cheers

Dennis

Cheers for the information Dennis - I will investigate further.

Originally Posted by Hagar

Very nice Doug, detail, colour, focus and depth look great. Just those pesky satelites.

Thanks Doug - M42 seems to be a magnet for satellites.

Doug