a sharper venus

Nothing makes a better mousetrap than good seeing. I enjoyed a little bit of this before sunrise this morning. After imaging the moon, I shot Venus again using the CaK and green filters.

best -
Alan

Attached Image:

wow!

Alan,

Wow, those are brilliant images! That CaK filter is quite a performer.

Paul

Hi Alan,

wow, superb cloud details in near UV - the CaK filter works like a charm 8)

Best wishes,
Oliver

Alan, that is the best Venus shot with cloud detail I have ever seen. That CaK filter seems to work better than some previous UV filtered images posted. The quality of your astro images are absolutely amazing. Thanks

Regards,
Steve

Beauuutiful!

Rooolando

Dan Petersen said:

I've read that the Baader Calcium K-Line Solar Filter may be used to image Venusian cloud patterns but I never gave it any serious consideration, until now. Did you use an IR-cut with that and could you observe any of those magnificent clouds?

Thanks, Dan. I have the CaK-line filter for solar imaging with a Baader Herschel wedge. My guess is the U filter with it's wider bandpass and better coverage into the near UV would produce an image with more contrast. I did not use an IR cut filter - this is needed with the solar continuum filter but not (I think!) with the CaK. I did glance at the image in the eyepiece but could see a hint of cloud markings. Our eyes are not very sensitive at these wavelengths.

clear skies!
Alan

That's one of the best I've ever seen! Thanks, Jason H.

Alan Friedman said:

Nothing makes a better mousetrap than good seeing. I enjoyed a little bit of this before sunrise this morning. After imaging the moon, I shot Venus again using the CaK and green filters.

best -
Alan