Coronado PST

Hi Micheal,
The Passband of the rear filter appears like a modulation pattern with many maxima with the one near H-alpha at the maximum ampilitude. The blocking filter (at the front) just isolates the one near H-alpha. The (small) amount of other colours is useful for image processing both prominences and surface detail, an article in S&T recently explained this.
John

Thanks Michael

Glad to hear you're happy with the PST.

Have to say, it's one of my favourites too.

Continued Clearskies

Jimmy

Ps. The case is nice too.....finishes the look as well as being practical.
Jimmy

PST is a real favourite here in Astro2 as well, lets us run events on campus during the day in easy to reach places (like the grass between the two main buildings on campus) so we get to more of the students on campus. The students are also very fond of the views you get from the PST because they really are something else!

And like Jimmy said, the case is cool, really practical and just looks the business!

Bart.

Thats an interesting thought John.
so there are other colours because of sidebands.
Still, I dont see how this can account for the high amount of green and blue Michael sees??
Just as a sanity check Michael, you are looking at the unprocesssed image when you look at the colour ratios :oops: :lol:

www.allaboutastro.com/Articlepages/hasolarimagingtips.html

Oh yea, I should have said - the case is actually very good quality. Very sturdy. Should last a lifetime. I had initially planned to buy the PST without the case. However, I'm glad now that I did get it as it makes the PST very secure. Definetly well worth getting.

Clear skies,