Search found 2999 matches

by Valery
Sun Oct 21, 2018 1:27 am
Forum: This is SolarChat !!
Topic: large gif test 13.mb - high speed timelapse
Replies: 2
Views: 5

Re: large gif test 13.mb - high speed timelapse

Apollo, you need to study those dark line ferrets and then publish an article in a scientific magazine! I never have read about them before. May be then some scientists with develop and make a good extra narrow band filter to study these solar features in details. With your present filter I cant see...
by Valery
Sun Oct 21, 2018 1:19 am
Forum: This is SolarChat !!
Topic: RAW stacked image in CaK with 280mm SCT
Replies: 0
Views: 1

RAW stacked image in CaK with 280mm SCT

Hi all, If any of you are interested in trying your processing skill. This is a RAW stacked image in CaK taken May 31 2018 with my C11 equipped with ARIES 296mm DERF. Filter - PST CaK #1 + original PST BF filter #2 + Edmund 10nm 393nm Camera Basler 1920-155 800 frames stacked Have fun. Valery
by Valery
Sun Oct 21, 2018 12:01 am
Forum: This is SolarChat !!
Topic: AR12724/25 remnants at high res 280mm C11
Replies: 2
Views: 37

Re: AR12724/25 remnants at high res 280mm C11

Great resolution! Very best, Thanks, Marty. You may be not believe, but this given post at least for 50% was targetted for you. This is where you can be with your 10" Meade or better with a C11, which are very cheap and powerfull enough and are better olutions for lunar and planetary lucky imaging ...
by Valery
Sat Oct 20, 2018 11:45 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: BF30 ITF replacement
Replies: 5
Views: 78

Re: BF30 ITF replacement

OTOH, my point, Apollo, was that you should finally understand that peoples like you, who trying to make all theirselves, as cheaper as possible, are quite quite rare. I know only one such person - you. I believe we should give small manufacturers a freedom to make the things the way they see. They ...
by Valery
Sat Oct 20, 2018 4:46 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: BF30 ITF replacement
Replies: 5
Views: 78

Re: BF30 ITF replacement

But its glued, and the epoxy is the achilles heal of these filters. Its a nice offer but I would of eliminated that lamination to rg630 glass with the h-alpha coat on the back of the kg3. Anybody can glue a kg3 filter right to a baader planetarium 7nm h-alpha filter using canadian balsam in a heate...
by Valery
Sat Oct 20, 2018 3:29 pm
Forum: This is SolarChat !!
Topic: AR12724/25 remnants at high res 280mm C11
Replies: 2
Views: 37

AR12724/25 remnants at high res 280mm C11

Hi all, Here are two photos of AR 2724 and 2725 remnants. No spots in them now. However they looks fine in C11 280mm telescope. I used two etalons. 1. Quark Chromosphere with FWHM <0.25A may be near 0,2A. and the second one is my best selected PST etalon worked in a telecentric scheme. Quark worked ...
by Valery
Fri Oct 19, 2018 8:12 pm
Forum: This is SolarChat !!
Topic: ISS pass 19th October 2018
Replies: 13
Views: 132

Re: ISS pass 19th October 2018

Super, super, super session, Alexandra!

And I especially love the full disk. It was taken with double stack, I guess?


Valery
by Valery
Fri Oct 19, 2018 6:42 pm
Forum: This is SolarChat !!
Topic: ZWO ASI290MM is too slow in the FireCapture V2.6.08
Replies: 6
Views: 103

Re: ZWO ASI290MM is too slow in the FireCapture V2.6.08

Hi Valery, You are running at max speed with the 12 bit ADC. At high-speed you use the 10bit ADC and then you get 170fps. Should be possible to select this in FC as well (at least with my cams I can), but it is hidden in the camera control panel behind the "gear" icon. Just press that one for speci...
by Valery
Fri Oct 19, 2018 5:05 pm
Forum: This is SolarChat !!
Topic: ZWO ASI290MM is too slow in the FireCapture V2.6.08
Replies: 6
Views: 103

Re: ZWO ASI290MM is too slow in the FireCapture V2.6.08

Hi Valery, you could try to switch on "High speed mode" in the camera settings. Hi Bart, This is FireCapture, not SharpCap. In the SharpCap I use "High speed mode" and have 170fps, as expected. The problem is that with FireCapture I can get only 80fps. And I prefer FireCapture interface much more t...
by Valery
Fri Oct 19, 2018 2:30 pm
Forum: This is SolarChat !!
Topic: ZWO ASI290MM is too slow in the FireCapture V2.6.08
Replies: 6
Views: 103

ZWO ASI290MM is too slow in the FireCapture V2.6.08

Hi all, Question to those who shoot with ZWO ASI290MM camera . In the video recording program FireCapture V2.6.08, this camera, when recording at 8 bits in full format instead of 170 frames per second, gives only 80-82 frames per second. When switching to 16bit recording mode, the speed drops to 10-...
by Valery
Mon Oct 15, 2018 3:43 am
Forum: This is SolarChat !!
Topic: Help Diagnose an SCT?
Replies: 24
Views: 447

Re: Help Diagnose an SCT?

And something else. Why would a 8 inch SCT be better than a 6 inch refractor? You win two inches, but you loose a lot because of the central obstruction. So by default, contrast is better in a refractor. This is a mistake in the case of ultranarrowband imaging! For planetary observing this is corre...
by Valery
Sun Oct 14, 2018 2:42 pm
Forum: This is SolarChat !!
Topic: A Sunrise in there somewhere.
Replies: 10
Views: 177

Re: A Sunrise in there somewhere.

So impressive, Derek!

So, where is this?
by Valery
Sun Oct 14, 2018 3:35 am
Forum: This is SolarChat !!
Topic: Help Diagnose an SCT?
Replies: 24
Views: 447

Re: Help Diagnose an SCT?

I slightly processed Marty's image of Copernicus crater and took the crop of this crated from the image taken with 260mm Vixen reflector. Here they are. Looking at the smallest details at the crater floor I can conclude that SCT keeps equality in resolution. All the differences in image quality can ...
by Valery
Sun Oct 14, 2018 2:50 am
Forum: This is SolarChat !!
Topic: 10-13-2018 Ar2724 - Triple iron arch's
Replies: 4
Views: 133

Re: 10-13-2018 Ar2724 - Triple iron arch's

What this (this sample) filter exact data? What is the telescope and full imaging train?

I see the arc in the center near the spot. But it is difficult to say what the real nature of it.
by Valery
Sat Oct 13, 2018 3:01 am
Forum: This is SolarChat !!
Topic: Help Diagnose an SCT?
Replies: 24
Views: 447

Re: Help Diagnose an SCT?

Marty's image of Copernicus shows some star-like bright points (summits of mounts or rocks) on a black background. They look a bit oval (may be atmospheric dispersion, may be a small astigmatism, but think that this is AD) and represent Airy disk. We can see even first diffraction rings around them....
by Valery
Fri Oct 12, 2018 10:41 am
Forum: This is SolarChat !!
Topic: Help Diagnose an SCT?
Replies: 24
Views: 447

Re: Help Diagnose an SCT?

Marty, I am optimistic about this your scope. Smaller craters around Copernicus makes me optimistic. I think that the only problem is that your scope is inside the building which can and does impact on the seeing as the source of turbulence of two kinds: convections and air flows disturbations. The ...
by Valery
Fri Oct 12, 2018 10:27 am
Forum: This is SolarChat !!
Topic: Winter project: CaK doublestack
Replies: 23
Views: 348

Re: Winter project: CaK doublestack

I know I would have to go bigger in the end. But first let me master this with a relatively small telescope (150mm f/8 Skywatcher). Bart, You are a prisoner of illusions. If your 150mm F/8 achromat is nully corrected at a green light, say, at 530-546nm then Strehl ratio at the CaK line 393,4nm is o...
by Valery
Fri Oct 12, 2018 10:06 am
Forum: This is SolarChat !!
Topic: Winter project: CaK doublestack
Replies: 23
Views: 348

Re: Winter project: CaK doublestack

TheSkyBurner wrote:
Fri Oct 12, 2018 6:22 am
Valery wrote:
Fri Oct 12, 2018 6:01 am
Yes, I do use SAFIX after ERF

I don't know what is your 150mm refractor to tell you wha to do.


Valery
150mm x 2250mm F/15
If your objective is null corrected at 532nm (530 - 546nm range), then at 3933,7A it
should has 0,94 Strehl and so, no corrector needed.

Valery
by Valery
Fri Oct 12, 2018 6:01 am
Forum: This is SolarChat !!
Topic: Winter project: CaK doublestack
Replies: 23
Views: 348

Re: Winter project: CaK doublestack

Yes, I do use SAFIX after ERF

I don't know what is your 150mm refractor to tell you wha to do.


Valery
by Valery
Fri Oct 12, 2018 2:35 am
Forum: This is SolarChat !!
Topic: Winter project: CaK doublestack
Replies: 23
Views: 348

Re: Winter project: CaK doublestack

Double or triple or quadro stack will not gain enough in sun appearance in Ca K at a small scale. Good Lunt CaK filter is enough for small telescopes. The only gain will be prominences. The only real gain from DS or TS can be obtained only at super granulation cells level. However this require a tel...
by Valery
Thu Oct 11, 2018 6:06 am
Forum: This is SolarChat !!
Topic: A very special prom on Oct 10
Replies: 27
Views: 452

Re: A very special prom on Oct 10

Hi, Skyburner Thanks for your suggestion about using an Ha filter in the optical train. I see that both Baader and Astronomik have a 7nm Ha filter that's ok pricewise. I'm not entirely clear on why the filter should be ahead of all the optics at the back end of the scope. That puts it in a very hig...
by Valery
Thu Oct 11, 2018 12:50 am
Forum: This is SolarChat !!
Topic: A very special prom on Oct 10
Replies: 27
Views: 452

Re: A very special prom on Oct 10

Prominences with 9.25" scope are so impressive! 0,63x reducer makes a sense.


Valery
by Valery
Wed Oct 10, 2018 8:24 pm
Forum: Solar Scope Modifications
Topic: PST Mods... but, why not a 40mm SolarMax Mod?
Replies: 13
Views: 256

Re: PST Mods... but, why not a 40mm SolarMax Mod?

Thanks Valery, Very interesting. A PST etalon & Quark together serves as a double stack and has a blocking filter without having to get anything other than the mounting hardware. I'm curious how it performs, if folk are doing that, and what kind of transmission it has? That would be quite interesti...
by Valery
Wed Oct 10, 2018 2:18 pm
Forum: Solar Scope Modifications
Topic: PST Mods... but, why not a 40mm SolarMax Mod?
Replies: 13
Views: 256

Re: PST Mods... but, why not a 40mm SolarMax Mod?

Marty, If you want to get the most out the equipment you got and get the most cost effective high res solar telescope, then better use tested solutions which showed that they really work as needed. Forget all these SM35, SM40 etc. a) Full size DERF + C8 + standard Quark Chromosphere + Camera (depend...