Baader ND3.8 1m roll expression of interest - Update

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Baader ND3.8 1m roll expression of interest - Update

Post by Montana »

Please add your name to the list if you would buy a roll. Let's see how many people we can get (bit like a petition) to write to Baader :)

I'm in

Alexandra


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Re: Baader ND3.8 1m roll expression of interest

Post by christian viladrich »

Excellent Alexandra ! I'll pass the information to others.

On my side, I am interested in 5 rolls.


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Re: Baader ND3.8 1m roll expression of interest

Post by christian viladrich »

Just as a reminder, here is what you can get with a C14 and sheet of Astrosolar 3.8 :

http://astrosurf.com/viladrich/astro/so ... UT-red.jpg

http://astrosurf.com/viladrich/astro/so ... 14-red.jpg

Cameras have largely improved since then.


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Re: Baader ND3.8 1m roll expression of interest

Post by GreatAttractor »

I'm also interested. It would be nice if the roll is 25 cm or 30 cm wide.


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Re: Baader ND3.8 1m roll expression of interest

Post by MapleRidge »

Hi All...

Count me in for the large sheet to be able to make a full aperture filter for my C14.

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Re: Baader ND3.8 1m roll expression of interest

Post by DavidP »

I’ll buy some


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Re: Baader ND3.8 1m roll expression of interest

Post by marktownley »

Yeah, i'll buy some too.

Don't forget though people, if you have an ERF for your cat/mak/rct etc you can use this in conjunction with a solar wedge to image in WL, I have done this with my HaT in the past.


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Re: Baader ND3.8 1m roll expression of interest

Post by JochenM »

Absolutely. Would be nice to make a full aperture sheet for my C9.25.


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Re: Baader ND3.8 1m roll expression of interest

Post by christian viladrich »

Hello Alexandra,

I started a pool on a French forum here :

http://www.astrosurf.com/topic/152586-e ... 38-de-1-m/


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Re: Baader ND3.8 1m roll expression of interest

Post by LauraMS »

I would be in for three roles (1m each)


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Re: Baader ND3.8 1m roll expression of interest

Post by Montana »

Excellent Christian, we will give it a while then add the numbers up together :) I wonder what their minimum order would be?

Alexandra


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Re: Baader ND3.8 1m roll expression of interest

Post by christian viladrich »

Hello Alexandra,
Maybe we can pass the info to Cloudy Night Forum ? I don't know whether this is compatible with their rules ?


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Re: Baader ND3.8 1m roll expression of interest

Post by Montana »

OK so far we have:

1 Alexandra Hart
5 Christian Viladrich
1 Filip Szczerek
1 Brian Coville
1 David P
1 Mark Townley
1 Jochen Maes
3 Laura MS
? Nigella Bryant (need to contact her)

2 chonum
1 Sauveur
2 astrovicking
1 messier63
2 cg16ang
1 silvietto
2 AlSvartr
2 JPMasviel
2 XavS
1 niborevad
1 banjo (Paul)
1 marco91
2 astrolamine
2 zorgdotnl
1 Pascal Tamburini
1 pascal_77
? Mehdi
1 jean guinet
1 Jean-Marc_M
1 allhoest

41 TOTAL

Need to check translation, I don't think EricS83 is wanting 26 rolls, does Mehdi want one?

Alexandra


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Re: Baader ND3.8 1m roll expression of interest

Post by christian viladrich »

Hello Alexandra,

Eric83 was just summing up the current total.
Not sure Medhi wants one. Don't count any or him.

Alexandre Lhoest is going to launch a similar pool on German language forum(s).

Christian


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Re: Baader ND3.8 1m roll expression of interest

Post by TareqPhoto »

I really prefer a mounting ring with those sheets rather than me cutting it and DIY it, if anyone is expert to make a precise one for my scope diameter so i just place/mount on the scope like gloves,.... I AM BIG INTERESTED IN then.


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Re: Baader ND3.8 1m roll expression of interest

Post by Montana »

I bought the EMC solar filter for my C11 and swapped out the ND5 for ND3.8 for imaging.

https://astrograph.net/epages/www_astro ... ht_Filters

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Re: Baader ND3.8 1m roll expression of interest

Post by allhoest »

Hello Alexandra,
Dear German members,

Thank you Alexandra for launching this call.

As Christian mentioned, I'm ready to rely your initiative to the German "astronomie.de":
https://forum.astronomie.de/forums/sonne.170/

I must say that I'm not a German citizen and I would prefer that a German member of solarchat takes the hand here. If no one does, then I'll do.

How do you figure to "retail" the pieces?
Christian will group the rolls for France,
you (Alexandra) would take care for the UK?
If no German member takes the hand, I could take care for Germany?

Or would you suggest that each of us get the roll directly from Baader?


Beside note: I wish a filter of eg ND2.5 instead of 3.8.


CS
Alex


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Re: Baader ND3.8 1m roll expression of interest

Post by Montana »

Alex,

It was more a petition style, we need to convince Baader that it is worth their while to make a run and that enough people would be there to buy it. We would need to buy from Baader if they made it.

However, we are still unsure how much a run would be, is it 50m or 1000m? At least if we could generate enough interest we could convince them to manufacture a run and then we could all buy them.

Alexandra


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Re: Baader ND3.8 1m roll expression of interest

Post by LauraMS »

I strongly support Alex' notion of ND=2.5 or so. This would allow to go for lower bandwidth filter (e.g.G-Band filter) in connection with short exposure times. However, it may be less universal in use because thermal issues may get more severe than at ND 3.8.


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Re: Baader ND3.8 1m roll expression of interest

Post by galaxie427 »

Hello Alexandra,

Please put me down for 1 roll (assuming 50x100cm).
btw, In checking about the 3.8 film last summer with Alpine Astro here in US, I was told the film is manufactured in 1,000 meter runs.
Thanks so much for this opportunity!
Last edited by galaxie427 on Tue Apr 19, 2022 9:16 pm, edited 1 time in total.


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Re: Baader ND3.8 1m roll expression of interest

Post by christian viladrich »

Montana wrote: Thu Mar 10, 2022 2:11 pm Alex,

It was more a petition style, we need to convince Baader that it is worth their while to make a run and that enough people would be there to buy it. We would need to buy from Baader if they made it.

However, we are still unsure how much a run would be, is it 50m or 1000m? At least if we could generate enough interest we could convince them to manufacture a run and then we could all buy them.

Alexandra
Indeed, I had a talk with M. Baader about 4 years ago about the Astrosolar film. It was at a Astro Meeting in Paris. My understanding was that the manufacturing of the solar film was very difficult, and to launch a new run was more a question of several hundreds of meters.


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Re: Baader ND3.8 1m roll expression of interest

Post by christian viladrich »

LauraMS wrote: Thu Mar 10, 2022 2:55 pm I strongly support Alex' notion of ND=2.5 or so. This would allow to go for lower bandwidth filter (e.g.G-Band filter) in connection with short exposure times. However, it may be less universal in use because thermal issues may get more severe than at ND 3.8.
Sure Laura. But first let's see how many people would be interested in a ND3.8 and check with Baader if the count is large enough for a new run


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Re: Baader ND3.8 1m roll expression of interest

Post by allhoest »

Hi!

Regarding thermal issue under with a ND2.5, I would not be afraid.
Many of us use non aluminized mirrors with ~4% of reflection of the incoming flux without major problem. Maybe at native focal ratio, a filter can be added. Along with barlow/telecentric, there is no thermal issue.

Regarding the 1000m run, I don't really see the problem.
The rolls are 1x0.5m, so the nominal width is 0.5m.
With 0.5m, they can sell 2x 250mm pieces, etc.

I have posted the "expression of interest" on astronomie.de. Let's see...
https://forum.astronomie.de/threads/umf ... ck.321759/

CS
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Re: Baader ND3.8 1m roll expression of interest

Post by LauraMS »

[quote="christian viladrich" post_id=326365 time=1647000376 user_id=3037]

Sure Laura. But first let's see how many people would be interested in a ND3.8 and check with Baader if the count is large enough for a new run
[/quote]

sure Christian .. But may I remind you that Alex brought that idea into this thread? I am just responding.


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Re: Baader ND3.8 1m roll expression of interest

Post by Montana »

Hi Alex,

Does anyone on the astronomie.de express an interest?

Alexandra


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Re: Baader ND3.8 1m roll expression of interest

Post by Montana »

I've just sent a 'Contact us' request.

We have 39 astronomers with a pledge for 51 rolls and 2 provisional. I couldn't find any responses on the German site.

I'll post the response from Baader here when I receive it.

Alexandra


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Re: Baader ND3.8 1m roll expression of interest

Post by ffellah »

I can be interested depending on the price. I have a crazy project in mind. I spoke a couple of weeks ago with Bob Luffel at Alpine and he told me Baader may consider a new run early next year in view of the upcoming 2024 solar eclipse. I have down to contact him next January.

Franco


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Re: Baader ND3.8 1m roll expression of interest

Post by christian viladrich »

Hello Alexandra,
On Astrosurf French forrum, we are up to 39 rolls.
I don't see any response on the German forum, but I don't read german. I'll ask Alex to make sure.
Cloudy Night never answered my message asking their authorization to pass the info.


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Re: Baader ND3.8 1m roll expression of interest

Post by vineyard »

Hi, if its not too late to join the list, then yes please count me in. Thank you!


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Re: Baader ND3.8 1m roll expression of interest

Post by alpenglow »

Yes please!! Cheers!


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Re: Baader ND3.8 1m roll expression of interest

Post by H-Alpha »

Thanks a lot Alexandra for your efforts!
Montana wrote: Sat Apr 09, 2022 12:56 pm I've just sent a 'Contact us' request.
We have 39 astronomers with a pledge for 51 rolls and 2 provisional. I couldn't find any responses on the German site.
I'll post the response from Baader here when I receive it.

Alexandra
I have missed your recent post on astrosolar when you sent it out and today Christian kindly let me know about these efforts by you and him.

Therefore, if there is still an opportunity, please add me in the list for one roll.
After my first solar scope last year, I recently saw my second dream of two decades coming true. I received my C14 Edge! :-) :-) :-)
I am really excited as you can imagine. I would like to be able to use it for WL in the rare cases of perfect seeing...
Christian's solar photos are so inspiring that I would love to try.

Hopefully Baader will respond positively at the end.

Thanks once more,
Alexandros


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Re: Baader ND3.8 1m roll expression of interest

Post by Montana »

That's fine Alexandros. It is now two weeks since I wrote to them and not even a reply saying anything at all. There are more than 40 astronomers waiting patiently for a reply :(

I am very disappointed to say the least. I think it is more polite to say, sorry but no, than absolutely ignoring me.

Does anyone have an email address for Mr/Ms Baader?

Alexandra


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Re: Baader ND3.8 1m roll expression of interest - Update

Post by Montana »

Finally an update which I will share in full for you. So we need to be patient and hopefully it is coming soon :) Thank you Baader :)

Dear Ms Hart,

please take our excuse for the belated reply. As most everyone we are overwhelmed by supply problems and exploding prices for raw materials. In fact we are struggling to keep our Baader products available without too many gaps in certain product families - Astrosolar film being one of them.

As mentioned to Mr Viladrich, we do thank you and the group for contacting us on this matter of large size Photosolar-Film in OD 3.8.

Unfortunately at this time we are unable to fill such a request. It may take us until end of this year to enable us supply such large sizes in OD 3.8 again. We dearly hope the supply issues that we face will improve within coming months. We are working on a method to increase safety while offering this OD.

There are numerous stages in the production process that need to be observed most carefully, in order to maintain optical quality and freedom from astigmatism. This film just looks so simple, but in fact it is a severe task to produce it in true optical quality. We will gladly inform everyone on our website as soon as we are successful.

We will definitely not forget this inquiry and hope by end of this year latest, to being able to serve you and the group,

Please bear with us and be thanked again for your interest.

Best regards,

Thomas Baader
BAADER PLANETARIUM GMBH


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Re: Baader ND3.8 1m roll expression of interest - Update

Post by christian viladrich »

Very good news :-)

Thanks a lot Mr. Baader !


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Re: Baader ND3.8 1m roll expression of interest - Update

Post by Radon86 »

Hi,

I would be interested in 2 rolls.
How much would 1 roll cost approximately.
Woukd it be ordered from Baader UK, as Baader in Germany charge a lot in postage.

Thanks.
Magnus


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Re: Baader ND3.8 1m roll expression of interest - Update

Post by Montana »

They need to make it first Magnus :)

Alexandra


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Re: Baader ND3.8 1m roll expression of interest - Update

Post by Stardust5858 »

Hi Alexandra, yes, I'd love to have some of the large baader Nd 3.8 solar film.


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2.7m Pulsar Dome.
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Re: Baader ND3.8 1m roll expression of interest

Post by Stardust5858 »

Montana wrote: Wed Mar 09, 2022 8:17 am OK so far we have:

1 Alexandra Hart
5 Christian Viladrich
1 Filip Szczerek
1 Brian Coville
1 David P
1 Mark Townley
1 Jochen Maes
3 Laura MS
1 Nigella Bryant (need to contact her) just back, many thanks.

2 chonum
1 Sauveur
2 astrovicking
1 messier63
2 cg16ang
1 silvietto
2 AlSvartr
2 JPMasviel
2 XavS
1 niborevad
1 banjo (Paul)
1 marco91
2 astrolamine
2 zorgdotnl
1 Pascal Tamburini
1 pascal_77
? Mehdi
1 jean guinet
1 Jean-Marc_M
1 allhoest

41 TOTAL

Need to check translation, I don't think EricS83 is wanting 26 rolls, does Mehdi want one?

Alexandra


10ft x 6ft Solar RoR with Warm Room
Lunt 60mm Double Stack HA
80ed WL+ Lunt Hershal Wedge + Badder K-Line filter.
100mm AR + Lunt b1800 Ca-K module.
Neq6 Eq Mount.

2.7m Pulsar Dome.
11in Celestron SCT + White Light Filter.
70mm AR Stellavue.
12inch OO Newtonian.
Eq8 r Pro Mount.
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Re: Baader ND3.8 1m roll expression of interest - Update

Post by DavidP »

Has anyone tried imaging with the ND5?
What kind of exposure times are required with this?


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Re: Baader ND3.8 1m roll expression of interest - Update

Post by GreatAttractor »

One can use ND 5, but it becomes suboptimal when you push the setup towards optimal sampling and contrast. E.g., at f/16 and with Solar Continuum (which is quite narrow at 8 nm), ND 3.8 led to about 7 ms exposure (at zero gain, with histogram at 80-90%) with the ICX445 sensor (newer ones might be better by a few 10s of %, but that's it). ND 5 would require about 16x longer, which in less-than-perfect seeing would be unworkable (on the other hand, on new sensors you can increase gain a lot and still not get too much noise).

If all you can get at the moment is ND 5, by all means give it a go (and don't use very narrow filters; e.g., use a "visual" green filter instead of the Solar Continuum).


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Re: Baader ND3.8 1m roll expression of interest - Update

Post by Montana »

Yes, it was impossible :(

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Re: Baader ND3.8 1m roll expression of interest - Update

Post by Arrakis97 »

I will buy 1 Baader OD 3.8 100x50 cm.
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Re: Baader ND3.8 1m roll expression of interest - Update

Post by vineyard »

GreatAttractor wrote: Wed Jun 15, 2022 7:44 pm If all you can get at the moment is ND 5, by all means give it a go (and don't use very narrow filters; e.g., use a "visual" green filter instead of the Solar Continuum).
I'm not a v good imager, but in case its of interest DavidP here - viewtopic.php?t=36658 - are some images I took 2 days ago w ND5 film. I used an Astronomik 642nm long-pass filter (ie a broad band pass as GreatAttractor also says). Cheers


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Re: Baader ND3.8 1m roll expression of interest - Update

Post by proceau »

I will buy 1 Baader OD 3.8 100x50 cm for C11


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Re: Baader ND3.8 1m roll expression of interest - Update

Post by Radon86 »

Dear Alexandra/Montana,

Is it time to order these ND3.8 films yet ?
I think I would like 1-2 rolls.

Thanks.
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Re: Baader ND3.8 1m roll expression of interest - Update

Post by Montana »

According to the statement of Mr Baader above he quotes "We will definitely not forget this inquiry and hope by end of this year latest, to being able to serve you and the group" so I don't think we are are at the end of this year yet :)

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Re: Baader ND3.8 1m roll expression of interest - Update

Post by shadowchaser »

Montana wrote: Thu Aug 18, 2022 6:21 pm According to the statement of Mr Baader above he quotes "We will definitely not forget this inquiry and hope by end of this year latest, to being able to serve you and the group" so I don't think we are are at the end of this year yet :)

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Hi Alexandra!

I am interested in one of these sheets of film for my 12" Meade. Is Baader going to put them on sale to the general public or just for this group? Because I live in Argentina and I don't know how they would be shipped.
Another question, are they only going to sell the 100x50 cm sheets or also the filters already mounted on a frame?

Thank you very much!


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Re: Baader ND3.8 1m roll expression of interest - Update

Post by Montana »

Dear Shadowchaser,

I would presume that it would be on sale for the general public, you would need to buy direct from Baader. We got this expression of interest going to show Baader that if they produced a run they would have enough people who would buy it. It was an incentive. So order through your normal channels. Usually you have to buy a filter with a ND5 in, then buy the film and replace the ND5 with the ND3.8. I think they sell the filters cells with ND5 fitted only.

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Re: Baader ND3.8 1m roll expression of interest - Update

Post by shadowchaser »

Montana wrote: Fri Aug 19, 2022 7:55 am Dear Shadowchaser,

I would presume that it would be on sale for the general public, you would need to buy direct from Baader. We got this expression of interest going to show Baader that if they produced a run they would have enough people who would buy it. It was an incentive. So order through your normal channels. Usually you have to buy a filter with a ND5 in, then buy the film and replace the ND5 with the ND3.8. I think they sell the filters cells with ND5 fitted only.

Alexandra
Thank you very much Alexandra for your answer!
I hope to get one of these filters, I have one for my Maksutov 180 and it gives me very good results.


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Re: Baader ND3.8 1m roll expression of interest - Update

Post by InFINNity-Deck »

Hi Alexandra,

could you please add me to the list?
I am struggling quite well with ND5.0 on a C11, but ND3.8 must mean a great improvement.

with kind regards,
Nicolàs

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