From: Milton Aupperle <milton@outcastsoft.com>

Date: March 19, 2012 11:34:01 AM MDT

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] Wrestling with Venus

Hi Alan;

You can shoot during daylight with a UV Filter - which would help reduce the heating issues. The sky light will basically be filtered out. The tricky part is finding Venus in the daylight.

I am eager to try out Venus with my RC Scope, which should yield better light transmission as there is no corrector plate glass like my old 8" SCT. I tried it once last month, but turbulence was jumping the images +/- 10 arc seconds between frames. I would have to image it during the daylight as the Condo wall blots out anything beyond about 220 AZM and Venus hits max elevation at about 4:30 pm MST.

That is assuming it ever stops snowing / fog / drizzle / clouds and the jet stream isn't parked right over me like it has been for the past several weeks.

TTYL..

Milton Aupperle

On 19-Mar-12, at 11:06 AM, Alan Friedman wrote:

Thanks Milton... yes, shooting in the waning hours of sunlight, 7 to 7:30 local time. It was a beautiful clear day and as soon as the sun set, the heat radiation sent the seeing into a tailspin.

I purchased the K-line filter for solar work primarily, but found it suitable for Venus, though very narrow as you point out. Normally, Venus is out of reach for me from my backyard pier, but now that we have a nice planetary instrument at the club observatory I might look to add a more traditional UV filter to my collection.

best,

Alan