thx all
Montana - yes I love the sound of spinning prisms

Merlin66 - is the Meudon/Paris SHS still in action?

Carbon60 - yes seeing an 80 year old device still working and only 4 hrs(car) from where I live so very cool

following is from DavidG on changes and future upgrades 1) Improved slow motion controls and added hand paddle to allows the user to easily slew around the surface of the Sun 2) Added longer singlet focusing mechanism so the singlet can be focused from CaK to Ha 3) Replaced Fecker metal flat with po...

I tried a video
does give size portions

https://www.youtube.com/watch?v=HO_0Lbt2FkM

ok now for images (no justice) I was able to see "peach" on surface and proms but S8 camera could see flicker that human eye can not see refresh rate was 45 per second but here they are anyway I going to ask those guys if I can bring a better camera and mount to get better quality images SHSprom1s.j...

collimator and spectrum in action

old style power supply

display of original speculum metal gratings and display cabin

its been improved
image as good as filter
only negative is narrow field view

Note any sun images taken by hand hold S8 do not show quality of image
but I posted them anyway
front end 18 foot lens assembly

thx mark

i sold a couple of these one to someone in France
one to Canada

i plan to write article on how i make them

it takes about 35 to 40 hrs

I ground my own 24 feet FL lens (5 inch 120mm)
it creates image over 2 inches

here is test I did
6 inch SS lens cut to 4 inch
sun dia is about .75 inch I counted 8.5 feet from lens to wall

7 30 caH

one has dark marks which are clouds

you will need to stop down aperture
quality across surface not that good
I have 150mm by 4000

cut to 100mm then its ok

I wound up grinding a few of my own
hence "highfnum" I have 24 and 48 feet 125mm lens

what do you mean by real?
it does increase contrast

note standard quark has .6x reducer on nose
note combo quark does not
note standard quark is prominence model
note combo quark is chromosphere model

image with lunt and standard quark

thx for fix

here is set up for combo quark
I found 2.5 X barlow (in this case televue ) works best

ive had a few request for this image

so here it is

thx all
nice to here from you Stu

I like that Ha Hb inverse thing - i dont fully understand all the physics involved

Ha
hb
cak

BTW 3 separate runs

not much going on up there so I spent time experimenting on H-beta freq brightness
dark medium brt

7 16 caK its quiet up there maybe one of you guys and do a sun dance to wake it up

excellent first

7 14
its going dead again B&W shows prom on left