Search found 1133 matches

by yltansg
Fri Nov 16, 2018 4:08 pm
Forum: This is SolarChat !!
Topic: post a photo of your objective coating!
Replies: 3
Views: 192

Re: post a photo of your objective coating!

Hi Apollo, Some of mine: https://3.bp.blogspot.com/-pOByACY5QvM/W-6g1jUmZXI/AAAAAAAAe1M/HyLUPGDj_u4unF0MYquPxrvvY_7Ucb9KACLcBGAs/s1600/20181116_180319.jpg Sky90 https://1.bp.blogspot.com/-s06_Z_U7tJE/W-6hFXfwcFI/AAAAAAAAe1c/jbBy4eUAQQErxTiBTkJDUBQ6vLYASPZVACLcBGAs/s1600/20181116_180934.jpg https://1...
by yltansg
Sun Aug 26, 2018 2:45 pm
Forum: This is SolarChat !!
Topic: Alexandra’s birthday.
Replies: 11
Views: 341

Re: Alexandra’s birthday.

The Sun, seen here in Singapore, wishing you happy birthday, Alexandra!! In H-Alpha, using a Sky90 with SF70 SS: https://4.bp.blogspot.com/-wdSnKV9IqjE/W4K6AANzsNI/AAAAAAAAdEQ/XX-w89_Nyh8SvT4EfUXM0e6J4nGiSbfAgCLcBGAs/s1600/Mars_060812_400fCrRot6L2S15C15.jpg https://3.bp.blogspot.com/-fHQ4G7PgWcs/W4K...
by yltansg
Sat May 26, 2018 1:11 pm
Forum: This is SolarChat !!
Topic: A very big flower on the Sun. May 23 2018.
Replies: 8
Views: 500

Re: A very big flower on the Sun. May 23 2018.

Hi Valery,

Your C11 captures are fantastic. Inspire me to do better in solar imaging....

Looking forward to seeing your C14 captures too.

Alfred
by yltansg
Fri May 18, 2018 1:35 am
Forum: This is SolarChat !!
Topic: Hydrogen Sun 14th May 2018
Replies: 17
Views: 859

Re: Hydrogen Sun 14th May 2018

Hi Stu,

That's a beautiful catch.

Alfred
by yltansg
Wed May 09, 2018 12:58 pm
Forum: This is SolarChat !!
Topic: C11 out for a third time and it gets better and better!
Replies: 21
Views: 1282

Re: C11 out for a third time and it gets better and better!

Hi Alexandra,

Amazing!! Thanks for sharing the outcome of your experiment.

It is a pity they don't sell the larger format ND3.8 Baader film :cry:
Alfred
by yltansg
Sat May 05, 2018 1:04 pm
Forum: This is SolarChat !!
Topic: First Light with Celestron C11
Replies: 21
Views: 1060

Re: First Light with Celestron C11

Hi Alexandra,

Congrats!! You have caught gems on the Sun :)

Alfred
by yltansg
Mon Apr 30, 2018 7:38 am
Forum: This is SolarChat !!
Topic: H-Alpha Images on a quiet Sun (Singapore)
Replies: 8
Views: 548

Re: H-Alpha Images on a quiet Sun (Singapore)

Hi Derek, Rainer, Franco, Eric and Mark,

Thanks for your kind comments. There were no chances for imaging since then. The following are some HA close-up taken on the same day:

Borg 76mm +SF50DS + x3 barlow
by yltansg
Sun Apr 29, 2018 7:45 am
Forum: This is SolarChat !!
Topic: H-Alpha Images on a quiet Sun (Singapore)
Replies: 8
Views: 548

H-Alpha Images on a quiet Sun (Singapore)

28Apr18 was another poor day for solar imaging. I started with the Celestron 150 refractor with a full aperture D-ERF + Lunt LS50 THa + ASI174 MM camera. https://3.bp.blogspot.com/-VmzU7W0UAkI/WuQD9Fb7SRI/AAAAAAAAa2U/wiEbsvfvqics6xUGkaLzu_mXAc9C-ybvwCLcBGAs/s640/20180428_082529.jpg I have to raise t...
by yltansg
Fri Apr 27, 2018 8:42 am
Forum: This is SolarChat !!
Topic: Full Aperture D-ERF on 8"SCT & 150mm Refractor -HA Imaging (New Add)
Replies: 14
Views: 907

Re: Full Aperture D-ERF on 8"SCT & 150mm Refractor -HA Imaging (New Add)

Valery wrote:
Thu Apr 26, 2018 1:45 am
Hi Alfred,

The etalon in your LS50 scope is excellent! Good high res image with it!

Valery
Yes, it is a good etalon limited by seeing condition and my pp skills :)

Alfred
by yltansg
Fri Apr 27, 2018 6:57 am
Forum: This is SolarChat !!
Topic: Quick CaK Full Disk 26th April
Replies: 7
Views: 442

Re: Quick CaK Full Disk 26th April

Hi Mark,

Nice CAK FD image. It has been very cloudy and raining on this side of the world.

Alfred
by yltansg
Thu Apr 26, 2018 11:00 am
Forum: This is SolarChat !!
Topic: High res Ca K image with TOA150 on April 24
Replies: 7
Views: 461

Re: High res Ca K image with TOA150 on April 24

Hi Christian,

Fantastic sharpness. Makes me want to have another try on CAK imaging with the 8" ARIES tri-band D_ERF.

Alfred
by yltansg
Thu Apr 26, 2018 10:55 am
Forum: This is SolarChat !!
Topic: Sun in Halfa/Cak/White light with solar refractor 228
Replies: 18
Views: 1112

Re: Sun in Halfa/Cak/White light with solar refractor 228

Hi Alessandro,

Congrats on a great set of images! Always nice to see the grass and proms.

Alfred
by yltansg
Tue Apr 24, 2018 12:33 pm
Forum: This is SolarChat !!
Topic: Full Aperture D-ERF on 8"SCT & 150mm Refractor -HA Imaging (New Add)
Replies: 14
Views: 907

Re: Full Aperture D-ERF on 8"SCT & 150mm Refractor -HA Imaging (Singapore)

Mars_101232_290fI2crTPDNUSMInkDrkInkAsImcurcr.jpg
Mars_101232_290fI2crTPDNUSMInkDrkInkAsImcurcr.jpg (501.57 KiB) Viewed 759 times
Another one on AR12706 from the 150mm refractor
by yltansg
Tue Apr 24, 2018 12:20 pm
Forum: This is SolarChat !!
Topic: Sun in Halfa/Cak/White light with solar refractor 228
Replies: 18
Views: 1112

Re: Sun in Halfa/Cak/White light with solar refractor 228

Hi Ale,

Nice grass on the limbs!

Alfred
by yltansg
Tue Apr 24, 2018 12:17 pm
Forum: This is SolarChat !!
Topic: AR2706 21 april
Replies: 24
Views: 1267

Re: AR2706 21 april

Hi Bart,

Excellent duo!! Can you share your workflow used in your post-processing?

Alfred
by yltansg
Tue Apr 24, 2018 12:04 pm
Forum: This is SolarChat !!
Topic: Some Sun From The Last Couple of Days
Replies: 7
Views: 477

Re: Some Sun From The Last Couple of Days

Hi Mark,

They are all great images. The one on AR12706from the double quark is especially beautiful

Alfred
by yltansg
Fri Apr 20, 2018 12:58 pm
Forum: This is SolarChat !!
Topic: Full Aperture D-ERF on 8"SCT & 150mm Refractor -HA Imaging (New Add)
Replies: 14
Views: 907

Re: 20 Apr 18 FD, Full Aperture 8"SCT & 150mm Refractor HA Imaging (Singapore)

Here is another image from the 150mm refractor fitted with ARIES full aperture D-ERF

Image
by yltansg
Fri Apr 20, 2018 12:14 pm
Forum: This is SolarChat !!
Topic: Full Aperture D-ERF on 8"SCT & 150mm Refractor -HA Imaging (New Add)
Replies: 14
Views: 907

Re: 20 Apr 18 FD, Full Aperture 8"SCT & 150mm Refractor HA Imaging (Singapore)

]In contrast the images from the 150mm Celestron OMNI XLT refractor + ARIES D-ERF + Lunt 50 + ASI174 produce alot more details. This confirms that the PST Etalon belongs to the category of 80% fair quality. https://2.bp.blogspot.com/-OK1QwHwzWZM/WtnX-9-_snI/AAAAAAAAask/3JkJD8FOFrAMZdMDbkslBs6i8L1h5R...
by yltansg
Fri Apr 20, 2018 9:10 am
Forum: This is SolarChat !!
Topic: Full Aperture D-ERF on 8"SCT & 150mm Refractor -HA Imaging (New Add)
Replies: 14
Views: 907

Full Aperture D-ERF on 8"SCT & 150mm Refractor -HA Imaging (New Add)

Region was cloudy but there were gaps of thin clouds. https://2.bp.blogspot.com/-yK-BhZD4tbI/Wtk-dbD8SAI/AAAAAAAAaow/Y-th208M_p0sfirR5yx-7sctNDNPcab2ACLcBGAs/s640/H2.jpg Imaging was done from 9 am to 10 am local time https://1.bp.blogspot.com/-_zwLTHsNnZ8/Wtk-h2d52wI/AAAAAAAAao0/GHDeJns4Q_Acpkb1h-OM...
by yltansg
Thu Apr 19, 2018 12:48 pm
Forum: This is SolarChat !!
Topic: 17Apr18 - ARIES D-ERF on C8 + PST Etalon Images
Replies: 9
Views: 645

Re: 17Apr18 - ARIES D-ERF on C8 + PST Etalon Images

Thanks Mark, Stu and Brian for your comments. From a few imaging sessions, I have concluded that this is the best etalon (out of the 5 that I have). However it is not able to deliver the high resolution I am looking for. I will continue to use it to find the best that it can deliver.

Alfred
by yltansg
Thu Apr 19, 2018 12:48 pm
Forum: This is SolarChat !!
Topic: 17Apr18 - ARIES D-ERF on C8 + PST Etalon Images
Replies: 9
Views: 645

Re: 17Apr18 - ARIES D-ERF on C8 + PST Etalon Images

The best F/D (on the camera chip) for IMX174 is about F/18-22. No necessity to go slower - you will not win in the detalization and sure will loss in ability to do a high resolution imaging with short exposures. Hi Valery, I have tried imaging with longer exposure and confirmed that it doesn't help...
by yltansg
Wed Apr 18, 2018 2:16 am
Forum: This is SolarChat !!
Topic: 17Apr18 - ARIES D-ERF on C8 + PST Etalon Images
Replies: 9
Views: 645

Re: 17Apr18 - ARIES D-ERF on C8 + PST Etalon Images

Hi Alfred: I like #3 the most, seems to be the sharpest. This etalon seems to be pretty good. Franco Thanks Franco. I went back to look at the images captured with my first PST etalon. It may be better than this one. Unfortunately weather doesn't permit imaging today. For the #3, my settings are - ...
by yltansg
Tue Apr 17, 2018 2:53 pm
Forum: This is SolarChat !!
Topic: 17Apr18 - ARIES D-ERF on C8 + PST Etalon Images
Replies: 9
Views: 645

17Apr18 - ARIES D-ERF on C8 + PST Etalon Images

It was a colourful sunrise https://4.bp.blogspot.com/-OZrnzo7AvGg/WtXwU25kzoI/AAAAAAAAaig/A5Q3H_PHfVgAOAUv0BIhhG6WXJJh8P5FACLcBGAs/s640/20180417_063732.jpg Followed by lots of clouds and turbulent seeing. https://3.bp.blogspot.com/-j0WwW-sUl18/WtXwaXCzoAI/AAAAAAAAais/if1LB7Huk7EdPsm5pTjGIJcU66flBVj1...