Quote:
Originally Posted by multiweb
So cool.  Looks like an orange texture - super fine details  Wasn't aware it was safe to point a C11 into the sun even with a solar filter in the front. Are you using the full aperture or just a small offaxis mask? How's the temp inside the tube handling it? |
Its an off axis filter Marc. I'm told once you get over 8" there is no advantage in a full aperture filter as the seeing generally isn't good enough to give much in the way of sharp frames. The limit might actually be as low as 4 or 5" depending on which source you refer to, but an 8" scope is limited to a 3" off axis filter, so they tend to go full aperture...
To be honest I haven't checked the tube temperature... my old C8 with a full aperture Baader Film filter used to get just slightly warm, the C11 only has a 4" aperture in the filter, so the effect should be at least 1/4 of what it was on the C8 (based on filter area and the increase size of the scope).
Al.