Search found 33 matches

by Merrill55
Tue Aug 07, 2018 11:41 pm
Forum: Solar Scope Modifications
Topic: Details of a telecentric lens for C8 Edge and Daystar filter
Replies: 6
Views: 587

Re: Details of a telecentric lens for C8 Edge and Daystar filter

How does the method of the heat of the primary mirror-proof reach?
by Merrill55
Mon Jul 16, 2018 10:43 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Recent Digital SHG
Replies: 12
Views: 410

Re: Recent Digital SHG

Thank you Joe.
Not yet.
I blocked almost stray light carefully.
I suppose it owes the rear surface of collimator lens.
For h-alpha light,I use a red filter on the front of telescope lens .
I will use the block bead for strong gohst.
by Merrill55
Mon Jul 16, 2018 12:59 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Recent Digital SHG
Replies: 12
Views: 410

Re: Recent Digital SHG

Thank you. My SHG has low contrast and I have an optical axis is not to match definitely. For the good capture, good seeing is necessary. Including a background, as for the good seeing of 3 minutes, it is rare. Birds and clouds, an airplane, the strong wind are enemies. I am improving it now to exte...
by Merrill55
Sat Jul 14, 2018 9:44 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Recent Digital SHG
Replies: 12
Views: 410

Re: Recent Digital SHG

Grating is 1800 grooves/mm,68.5mm*68.5mm of Richaedson Gratings.
by Merrill55
Sat Jul 14, 2018 9:07 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Recent Digital SHG
Replies: 12
Views: 410

Re: Recent Digital SHG

Telescope is Diameter 80mm and Focal length 910mm of acromatic lens.
Collimator, Camera lens is Diameter 70mm and Focal length 700mm of achromatic lens.
Slit width is about 20 micron.
I used 2* barlow lens. Telescope's effective focal length is about 1800mm.
CCd camera is ASI1600MM.
by Merrill55
Sat Jul 14, 2018 5:53 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Recent Digital SHG
Replies: 12
Views: 410

Recent Digital SHG

Trial H-alpha photo in 2018_07_14_07:12(JST) by Digital Spectro_Helio_Graph.
by Merrill55
Wed May 09, 2018 1:17 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Recent Digital SHG
Replies: 14
Views: 1381

Re: Recent Digital SHG

Trial H-alpha photo in 2018_05_09_10:44(JST) by Digital Spectro_Helio_Graph
by Merrill55
Fri Apr 13, 2018 7:36 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Recent Digital SHG
Replies: 14
Views: 1381

Re: Recent Digital SHG

Trial H-alpha photo in 2018_04_13_08:04(JST) by Digital Spectro_Helio_Graph.
Somewhat blur image.
by Merrill55
Fri Mar 09, 2018 12:38 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Recent Digital SHG
Replies: 14
Views: 1381

Re: Recent Digital SHG

When seeing is good, I want to photograph it ,because a fluctuation is reduced.
In addition, I want to wait for time because I can raise fps when the intensity of light of the sun is high.
by Merrill55
Wed Mar 07, 2018 5:40 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Recent Digital SHG
Replies: 14
Views: 1381

Re: Recent Digital SHG

Recent h-alph photo
I changed grating from DPI Grating to Richardson Grating.
by Merrill55
Tue Jan 23, 2018 11:02 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Recent Digital SHG
Replies: 14
Views: 1381

Re: Recent Digital SHG

Thank you all.
I'm going to change to Richardson grating from very old Diffraction Products Inc(20 years old).
It takes 3weeks.
by Merrill55
Sun Jan 21, 2018 10:07 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Recent Digital SHG
Replies: 14
Views: 1381

Recent Digital SHG

I got new h-alpha image today.

Merrill55
by Merrill55
Thu Jan 11, 2018 7:26 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: ROT2 command of IRIS
Replies: 53
Views: 4771

Re: ROT2 command of IRIS

Thank you all.

My recent photo is as follows;


Toshio Ohnishi
by Merrill55
Sun Dec 10, 2017 3:47 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: ROT2 command of IRIS
Replies: 53
Views: 4771

Re: ROT2 command of IRIS

Hi all;
Recent my SHG image.
Low contrast !!
by Merrill55
Tue Jan 03, 2017 12:13 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: ROT2 command of IRIS
Replies: 53
Views: 4771

Re: ROT2 command of IRIS

Bartolick; Yes,I should pay attention to stray light. I recognize it. Littrow lens cause a strong ghost.(Acromatic lens cause four goast) The binoviewer cause a strong ghost of the slit shape. Therefore I block it using red filter (R64) in the lower part of the binoviewer. When I use other wavelengt...
by Merrill55
Sat Dec 31, 2016 7:22 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: ROT2 command of IRIS
Replies: 53
Views: 4771

Re: ROT2 command of IRIS

Trial h-alpha photo by short SHG. 2016_12_31
by Merrill55
Sun Dec 25, 2016 10:36 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: ROT2 command of IRIS
Replies: 53
Views: 4771

Re: ROT2 command of IRIS

Merry Christmas all.
Have a nice holy night !!

Toshio (a part of HYLOV P.233)
by Merrill55
Sun Dec 25, 2016 9:59 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: ROT2 command of IRIS
Replies: 53
Views: 4771

Re: ROT2 command of IRIS

My Christmas solar image is as follows;
Somewhat blur image.
by Merrill55
Sat Dec 24, 2016 5:09 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: ROT2 command of IRIS
Replies: 53
Views: 4771

Re: ROT2 command of IRIS

I know one amateur. His name is Takashi Sakae. He is a teacher of high school.

I don't know any other amateur without him.
by Merrill55
Tue Dec 20, 2016 10:23 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: ROT2 command of IRIS
Replies: 53
Views: 4771

Re: ROT2 command of IRIS

Thanks Alexandra.

I will try to get more detail the solar surface.

Toshio
by Merrill55
Tue Dec 20, 2016 3:29 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: ROT2 command of IRIS
Replies: 53
Views: 4771

Re: ROT2 command of IRIS

Trial h-alpha photo.

Very poor image.
by Merrill55
Tue Dec 20, 2016 3:10 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: ROT2 command of IRIS
Replies: 53
Views: 4771

Re: ROT2 command of IRIS

Thanks Wah.
I'm beginner in SHG. So I must learn more about dogital procedure.
ROi is helpful for me.
I tried Vdub and SLim recently.
I Try to more experience about DigitalSpectroheliograph.

Thank you.
by Merrill55
Thu Dec 15, 2016 9:53 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: ROT2 command of IRIS
Replies: 53
Views: 4771

Re: ROT2 command of IRIS

Maybe,for visual using oscillations is 20-30 per second vibration and for graphical using is 5-10 per second.
For photo it need not make vibrate so fast. Conposite procedure is useful for smoothing.
by Merrill55
Thu Dec 15, 2016 1:12 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: ROT2 command of IRIS
Replies: 53
Views: 4771

Re: ROT2 command of IRIS

My old SHS is as follows,
I need not use 'merge' soft.
by Merrill55
Thu Dec 15, 2016 6:39 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: ROT2 command of IRIS
Replies: 53
Views: 4771

Re: ROT2 command of IRIS

My Hale vibrating slit made by razor blade.

H-alpha photo by old SHS is as follow.