26/05/17 WL Comparison - Problem SOLVED!

[Macavity]

**********************************************
OH NOES! This should have gone in *Imagining* Solar!
But at least I was showing an interest in other viewpoints?
(If there is a *moderator around who can fix this? Please!) 
**********************************************

Some of you (me anyway! lol) may have been intrigued by
comparisons of White Light... Baader Continuum and lately 
the Baader Double Stacked CaK filters! (My poor Wallet!)

Truth be told, I have never been happy with my attempt 
at "White Light" images generally. And now I know why!

To cut a LONG story short, I use a focal reducer to fit the
FULL solar disk onto a small (ASI120MM) chip. It seems I
have (at some stage) put the lens elements in the WONG
way round! Hey, it will focus FINE on (the typical!) ONE
spot group, but it explains my significant aberrations?!? 

BUT I definitely commend these C-thread reducers:
http://www.365astronomy.com/365Astronomy-0.5x-Focal-Reducer-with-C-mount-for-Video-Astronomy.html
Great for smaller ZWO Cameras (like my 120MM) etc.

For interest (still) are minimal processed (AS!2 "conv"
files!) comparisons of White Light, Solar Continuum
and DS CaK - Done correctly for a change... I hope! 

White Light (via ND1.8):

Solar Continuum filter:

DS "Calcium-K " Filter:

I checked out a LOT of things before finding this! Thanks to Michael Wilkinson
for confirming my concern... and suggesting that I look at the focusing a bit? 

Is it just ME... or was the "seeing" rather good today? A pleasant  breeze too!

[Davey-T]

Nice to have a sunny day to experiment, seeing has been pretty good here the last couple of days and last night, maybe because the jet stream is avoiding us ATM.

Dave

[johnfosteruk]

Glad you've finally got to the bottom of it Chris.

[Pete Presland]

Very nicely imaged.