im sure Wah! or Zetner can do a more clean job

I used PS cs3 for 1897 Muedon image

original
inverse color

finally took out SHG
needs a bit of clean and tuning
todays sun cak

very very nice

seeing was terrible and windy to boot but managed to get
bright ring around spot- was visual in Mg quark

WO apo 66mm F5.7
I think Mg is good both visually and photo
I use polarizing filter for more image contrast
of course proms are almost impossible to see in all other wave lengths except Ha , Hb

unless they are flare types

I was happy that I did pick up prom in Mg although very faintly

yup a subdued metal line but i like it
easy to see even more than caH line


the spectrograph verifies what mg filter sees and visa versa

a old mg shot I did with spectroheliograph

other side of sun showing patch cak vs mg

looks like other metal lines
easier to see visually
although a bit subdued in intensity
i was surprised that i recorded a prom
even a faint one
i find using a Polarizing filter
rotated to optimal position increases contrast
got a good deal at neaf

quark mg very faintest but there

quark cah

omega caK DS

apo66
quark Ha

saw your post on spaceweather
congratulations

sheesh !!!
real pro level stuff

you should write document on how to do HeD3

so others can try to do it

sheesh !!!
real pro level stuff

you should write document on how to do HeD3

so others can try to do it

how did u get chance to use one?

link with company name
https://fullerscopes.blogspot.com/2018/ ... maier.html

my old ITF removed

its ITF filter

that's oxidation not fungus starts at edge and works inward
I had same problem
replaced filter

older filters were not sealed at edge and their fate was sealed (no pun indented)

http://daystarfilters.com/Quark/MgIQuark.shtml

any opinions

hey thanks for posting this thread

I took mine apart and cube was in opposite of yours

I played around with this idea a while back

didn't do much for me
but I most likely missed something and did something wrong