Thanks Erik, Craig and Chuck, I think I'll stick with the 10x50 and save the 11x80 for after dark. patrick On 05 Apr 2010, at 09:09, Chuck Hards wrote:
Actually increased resolution will show you smaller sunspots, but it's up to you to decide if tinier sunspots are worth the extra weight of larger aperture. I have Baader white-light filters for my 70mm binos (both 15x and 20x), but for the sun, I think a 20x50mm bino would be just about right. There are no exit-pupil concerns for daytime viewing.
H-alpha resolution on the sun is limited more by the bandpass of the filter than aperture.
Some of you may recall my PSO (Pocket Solar Observatory) which is merely a 12x25mm bino equipped with Baader solar filters in lathe-turned plastic cells. My "grab and go" white light setup.
I'll take a photo of it soon and post it to the SLAS Gallery, if anyone is interested.
On Sat, Apr 3, 2010 at 10:35 PM, Craig Smith <cs2560@gmail.com> wrote:
You would get increased resolution, which would be of value for h-alpha but probably not much for sunspots.