Search found 1603 matches

by MalVeauX
Fri Jun 11, 2021 9:47 pm
Forum: Solar Scope Modifications
Topic: The ubiquitous Celestron C6-R
Replies: 30
Views: 930

Re: The ubiquitous Celestron C6-R

So the next step is to find a common barlow/amplifier that is affordable for anyone that shows best results in near UV as well. Or to figure out if we actually need one in the first place, or if the common ones are actually good enough? Ideally, a natively long focal-ratio is ideal; no other options...
by MalVeauX
Fri Jun 11, 2021 7:07 pm
Forum: This is SolarChat !!
Topic: AR2829 with Prom & AR2832, HA & CaK | June 11th 2021
Replies: 4
Views: 57

AR2829 with Prom & AR2832, HA & CaK | June 11th 2021

Heya, Been a nasty few days of weather, had small holes between the clouds this morning but seeing was pretty good, so I was able to grab quick data. There's a great prominence near AR2829 as it all rounds the limb, great active area. AR2832 has some nice plage and mottling with a filament near by. ...
by MalVeauX
Fri Jun 11, 2021 6:32 pm
Forum: Solar Scope Modifications
Topic: The ubiquitous Celestron C6-R
Replies: 30
Views: 930

Re: The ubiquitous Celestron C6-R

Heya, C6R (150mm F8 Synta lens): The spacing mod on the lens: C6R_Spacers_08.jpg C6R_Spacers_09.jpg C6R_Spacers_11.jpg Update, my previous data with the C6R respaced to 2.13mm which worked out well. I then masked it to 120mm F10 and used a 1.62x amplifier and took it to F16 with the ASI290MM camera ...
by MalVeauX
Wed Jun 09, 2021 4:02 pm
Forum: This is SolarChat !!
Topic: Answer by LUNT re: Hazy area on front internal lens of 130MT
Replies: 15
Views: 279

Re: Answer by LUNT re: Hazy area on front internal lens of 130MT

Thanks for the very detailed guid, Marty. But wouldn't opening and cleaning the optics messes up the collimation of the lens? I have cleaned my doublet and reassembled it without problem but a triplet would be very hard to recollimate if its off is it not? Hi, Could it mess up collimation? Sure. Bu...
by MalVeauX
Tue Jun 08, 2021 1:27 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Measurements of Ca K filters with Sol'Ex spectrograph
Replies: 3
Views: 38

Re: Measurements of Ca K filters with Sol'Ex spectrograph

Interesting Christian,

So neither exceed 50%~60% transmission respectively approximately at 3934A? Interesting that both filters do have high transmission according to the measurements at some point, but not at the K II line?

I wonder what Lunt's looks like?

Very best,
by MalVeauX
Mon Jun 07, 2021 7:57 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Solar Wedges, any data out there?
Replies: 18
Views: 250

Re: Solar Wedges, any data out there?

Thanks, It sure would be nice to know the quality of the optics in the wedges to help differentiate them. I'm surprised this isn't something old news. The Altair looks to be a clone of the APM wedge in every single way including location of each detail, other than color of the body. The Baader has ...
by MalVeauX
Mon Jun 07, 2021 3:44 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Solar Wedges, any data out there?
Replies: 18
Views: 250

Re: Solar Wedges, any data out there?

Thanks, It sure would be nice to know the quality of the optics in the wedges to help differentiate them. I'm surprised this isn't something old news. The Altair looks to be a clone of the APM wedge in every single way including location of each detail, other than color of the body. The Baader has a...
by MalVeauX
Sun Jun 06, 2021 4:03 pm
Forum: Solar Scope Modifications
Topic: The ubiquitous Celestron C6-R
Replies: 30
Views: 930

Re: The ubiquitous Celestron C6-R

Can't get actual proprietary data for the lens system, but appears he can get spec from Synta for their optical designs to re-space for CaK. Makes me wonder, couldn't one just dismantle the objective, check its 4 surfaces with a spherometer, plop the data into some optics modelling software and fin...
by MalVeauX
Sun Jun 06, 2021 3:22 pm
Forum: This is SolarChat !!
Topic: Answer by LUNT re: Hazy area on front internal lens of 130MT
Replies: 15
Views: 279

Re: Answer by LUNT re: Hazy area on front internal lens of 130MT

1) Ask to send back the scope to be fixed and receive it with the lens properly cleaned or replaced. (Apart the time and pain it will take and all the efforts of all kind,the risk in this case is that after it has been cleaned, it will have to travel again from the USA to Greece, and due to tempera...
by MalVeauX
Sun Jun 06, 2021 1:21 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Solar Wedges, any data out there?
Replies: 18
Views: 250

Re: Solar Wedges, any data out there?

Thanks, That's great information. A 4" wedge? Wow, quite the focuser to accept that thing! Interesting that the ERF and solar wedge are equivalent for instrument currents. That's more the info I'm seeking mainly anyways as a comparison to see. I favor the idea of a wedge for photosphere simply ...
by MalVeauX
Sat Jun 05, 2021 3:03 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Solar Wedges, any data out there?
Replies: 18
Views: 250

Re: Solar Wedges, any data out there?

Not quite what was asked, but there is a degree of self-testing of internal temperatures between solar foil and a wedge. The wedge is favoured by the more expert solar observer/imager. To the point where they are usually seen as superior to solar foil. Yet foil must keep the interior of the solar O...
by MalVeauX
Sat Jun 05, 2021 2:55 pm
Forum: Solar Scope Modifications
Topic: Collimating lens and behavior within different focal ratio light cones?
Replies: 18
Views: 366

Re: Collimating lens and behavior within different focal ratio light cones?

Did I miss the point where somebody mentioned using the Baader 1.125 GPC ahead of the etalon in a 6" f/8? :) I've done this; I still have it. But ultimately I'm not sure how its performing or what the actual magnification is, depending on placement. Conventional wisdom seems to be to place it ...
by MalVeauX
Sat Jun 05, 2021 11:51 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Solar Wedges, any data out there?
Replies: 18
Views: 250

Re: Solar Wedges, any data out there?

Hello Marty, Here are some ideas : 1) Regarding "optical quality". There are two factors : a- Optical quality in terms of overall shape measured in P-V, rms, Strelh ratio, etc. We need some equipment to do this. This service is offered by some companies, but it is expensive. On top on tha...
by MalVeauX
Fri Jun 04, 2021 11:03 pm
Forum: Image Processing: Tips and Techniques
Topic: PIPP To Speed Up Image Processing Time
Replies: 5
Views: 118

Re: PIPP To Speed Up Image Processing Time

Thanks Marty, that link is very informative, for reference the (basic) laptop i'm using is a i7 2.4Ghz 8Gb 256Gb. PC specs aside, my key takeaway here is that PIPP sorts frames using a global quality estimation (based on a single 'whole' frame'), AS3 does it's quality estimation based on 'local' al...
by MalVeauX
Fri Jun 04, 2021 7:05 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Solar Wedges, any data out there?
Replies: 18
Views: 250

Re: Solar Wedges, any data out there?

I'd be very interested to know any actual differences between the Baader and APM wedges for example (Altair's wedge looks exactly like APM's, same measurements and everything, so I assume they're clones?). I wish the Baader didn't come with all the extra stuff, as I don't need doubles of all that. O...
by MalVeauX
Fri Jun 04, 2021 4:22 pm
Forum: This is SolarChat !!
Topic: AR2827, AR2829, Prominences | HA | June 4th 2021
Replies: 7
Views: 87

AR2827, AR2829, Prominences | HA | June 4th 2021

Heya, It rained yesterday and today is not much better, I saw a small moment this morning between big clouds and waited a few out and tried some fast imaging in sucker holes. I didn't bother measuring seeing as the clouds just make it a mess anyways. On the screen the seeing was good enough (1.3~1.4...
by MalVeauX
Fri Jun 04, 2021 3:35 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Solar Wedges, any data out there?
Replies: 18
Views: 250

Re: Solar Wedges, any data out there?

I work with a lot of the manufacturers on products a lot of the time and have seen, used tested and rejected so many products. Ive gone thru 4 Lunt wedges to get the best one, the Meade versions are hit and miss in terms of build and you certainly cannot drop one as ive seen they dont take a hit ve...
by MalVeauX
Fri Jun 04, 2021 12:46 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Solar Wedges, any data out there?
Replies: 18
Views: 250

Re: Solar Wedges, any data out there?

Simon2940 wrote: Thu Jun 03, 2021 11:35 pm Problem with doing those tests is you'd have to have several of each units since they are so inconsistent. Dare i say, the Lunt and Baader are really the best 2 out there.
Can you elaborate how you come to that conclusion? How do you know they're inconsistent?

Very best,
by MalVeauX
Thu Jun 03, 2021 4:27 pm
Forum: Image Processing: Tips and Techniques
Topic: PIPP To Speed Up Image Processing Time
Replies: 5
Views: 118

Re: PIPP To Speed Up Image Processing Time

Hi Mark, I do pre-processing in PIPP (only quality weighting, no other processing) of my large piles of data. I reduce them down to 200~400 frames tops, depending on what I'm doing, because I generate quite often single files of 3.4k to 10.1k frames each go with the IMX290 sensor at 170 FPS or more....
by MalVeauX
Thu Jun 03, 2021 3:33 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Solar Wedges, any data out there?
Replies: 18
Views: 250

Solar Wedges, any data out there?

Hi all, Wedges are nothing new. But I'm curious if anyone has good data on them in terms of some of the current options. Data such as the heat each can take at which apertures for how much time, where the heat is located in the entire optical train, efficiency of the mirror and prism for reflection ...
by MalVeauX
Wed Jun 02, 2021 7:37 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Orion has bought Meade/Coronado
Replies: 3
Views: 114

Re: Orion has bought Meade/Coronado

I don't care who owns them. Meade wasn't doing anything good in this market anyways. I have no high regard for Orion either. But... I would love to see some care go into the Solarmax line. Maybe Orion can hand pick some good Solarmax options and re-brand them as something else? Competition is good f...
by MalVeauX
Tue Jun 01, 2021 10:13 pm
Forum: This is SolarChat !!
Topic: AR2827 and FDs 1st June 2021
Replies: 20
Views: 231

Re: AR2827 and FDs 1st June 2021

Super images Stu!

Very best,
by MalVeauX
Tue Jun 01, 2021 6:33 pm
Forum: This is SolarChat !!
Topic: AR2827 in High Res, Part Deux, HA & WL | June 1rst 2021
Replies: 5
Views: 94

AR2827 in High Res, Part Deux, HA & WL | June 1rst 2021

Heya, Woke up to some decent skies this morning, the temperature delta was crazy, it was getting very hot this morning, already sizzling in the upper 80's heading into the 90's in direct sunlight. Scopes were hot to touch after just a few minutes in direct light before being pointed at the sun. Had ...
by MalVeauX
Tue Jun 01, 2021 1:25 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: refractor for FULL Disk
Replies: 1
Views: 77

Re: refractor for FULL Disk

Hi, Yes, you can easily image the full disc with a short refractor and a Quark Combo (with a 0.5x focal reducer after the Quark). The thing you need though is a large sensor (1 inch class, mono). Note, there's zero benefit to FPL53 or Fluorite glass for sub-angstrom solar viewing, it's one wavelengt...