Search found 7 matches

by RaymondTSE
Tue Jun 11, 2019 3:06 pm
Forum: This is SolarChat !!
Topic: Newly arrived 295mm D-ERF
Replies: 17
Views: 2897

Re: Newly arrived 295mm D-ERF

Another photo.
by RaymondTSE
Tue Jun 11, 2019 2:56 pm
Forum: This is SolarChat !!
Topic: Newly arrived 295mm D-ERF
Replies: 17
Views: 2897

Re: Newly arrived 295mm D-ERF

While I am configurating the optimum optical train setup for visual solar Ha viewing, I soon find the scorching sun rays hurting my forearms and knees/legs even though I wear hat and neck protection. Further the high ambient temperature of above 32C is no fun for my on-going sweaty face/head. Then I...
by RaymondTSE
Fri May 24, 2019 3:02 pm
Forum: This is SolarChat !!
Topic: Newly arrived 295mm D-ERF
Replies: 17
Views: 2897

Re: Newly arrived 295mm D-ERF

Dear Valery, Agree that morning seeing is best before the Sun heats up. My 295mm DERF filter in about 2 years' time has picked up some dusts on the outer surface. Do you have any recommendations to clean off the dusts in addition to using air blower ? Suggestions from others are also welcome. Raymond
by RaymondTSE
Mon May 20, 2019 2:12 pm
Forum: This is SolarChat !!
Topic: Newly arrived 295mm D-ERF
Replies: 17
Views: 2897

Re: Newly arrived 295mm D-ERF

Dear all and Valery, Some updates when I just start to watch solar images visually recently. Previously tried to use Powermate 2X on C925HD with Quark Como but F20's light cone was too sharp and thus did not match Quark Combo. When I switched to Powermate 4X, F40 was too overwhelmed by bad seeing du...
by RaymondTSE
Sun Jul 02, 2017 5:27 pm
Forum: This is SolarChat !!
Topic: Newly arrived 295mm D-ERF
Replies: 17
Views: 2897

Re: Adapter for newly arrived 295mm D-ERF

SmartSelectImage_2017-07-03-01-26-36.png
SmartSelectImage_2017-07-03-01-26-36.png (1.23 MiB) Viewed 2733 times
Finally the tailored-made aluminium filter cell adapter for C925EdgeHD arrived. Carefully place 295mmDERF on top of C925HD.
The visual binoviewer setup at F30 is quite heavy now.
by RaymondTSE
Tue May 30, 2017 5:12 pm
Forum: This is SolarChat !!
Topic: Newly arrived 295mm D-ERF
Replies: 17
Views: 2897

Re: Newly arrived 295mm D-ERF

Dear Valery and others, Thanks for the valuable advice. I used the DERF to view the (setting) Sun with naked eyes this afternoon. Nice orange colour sky clouds and the red Sun. It would still take some time before the mating aluminium filter adapter could be tailored-made locally. The 12.5inch Dob c...
by RaymondTSE
Mon May 29, 2017 2:49 pm
Forum: This is SolarChat !!
Topic: Newly arrived 295mm D-ERF
Replies: 17
Views: 2897

Newly arrived 295mm D-ERF

Dear all, A slight surprise when an EMS parcel arrived toay (slightly ahead of my expected schedule) from Ukraine. After careful unwrapping of 2 carton boxes, I found a pearl white platic filter cell. I give myself a pleasant smile when I find the large filter in good shape, clean and free from visu...