Narrowest 393.37 ever by Apollo Lasky

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Re: Narrowest 393.37 ever by Apollo Lasky

Post by TheSkyBurner » Wed Sep 19, 2018 11:41 pm

bart1805 wrote:
Wed Sep 19, 2018 8:54 pm
Thanks Bob and Apollo!
So the Lasky CaK seems to behave almost the same as a PST CaK. With indeed the big difference that if I wanted to buy a PST CaK I would have to be very lucky to be really able to buy one. The Lasky CaK costs about 1.300 dollar and requires tilt. So a Skybender would be necessary. Are they for sale Apollo?
A Baader Blue and KG3 can be used instead of the 1NM Chroma filter as Erf. Or as Apollo pointed out you could use a 402 NM filter.
Am I correct?
You would definitly want the kg3, probably the beloptic extended blocking version or the newport optic’s antireflection coated version

For the erf i would use a Baader planetarium b-ccd slightly tilted 2 degrees in front of the chroma so there are no back or front reflections and a baader planetarium polarizer at the camera to control intensity. That should be a perfect combination for a flawless system with maximum transmission and insane prominence capturing ability. That would be the cheapest route without sacrificing anything.

Let me test it out beofre you guys make the purchase, i would hate to be wrong about the b-ccd and polarizer combo. It looks great on paper however. The baader planetarium kline filter should not be used.


I only have a couple skybenders left in my possession, however 10 more are to be delivered from my manufacturer anytime now. They just completed anodizing.

The chroma 402 filter is recommended currently because i know it works great right now, but it needs to be mounted with tilt shims in a deep well barrel. You can buy the shims and deep well barrel from thorlabs or newport optics or file the shims by hand if you have suitable metal tubing and a dremel tool cut off wheel.

We will knock this ball out of the park together!

I will be leaving to colorado for a couple weeks so please be patient!

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Re: Narrowest 393.37 ever by Apollo Lasky

Post by TheSkyBurner » Thu Sep 20, 2018 3:28 am

Would you guys prefer me to offer complete systems to eliminate any questions, guesswork and mounting issues?

I can build an iso1 clean room and pretty much run a small optics lab, i have the experience and all the tools for safe handling.

Otherwise its pretty much going to be do it yourself rules.

I will try to work something out, at the very least I can probably manage the shim tilted 402 + Kg3 erf filter pro-mounted in the skybenders, vacuum sealed and shipped. (and maybe a couple of the 1 angstrom filters a month but im not made of gold)

i will be very busy and focused with my other invention's, so time will be tight.
Last edited by TheSkyBurner on Thu Sep 20, 2018 5:39 am, edited 1 time in total.

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Re: Narrowest 393.37 ever by Apollo Lasky

Post by TheSkyBurner » Thu Sep 20, 2018 5:32 am

okay i just ordered the baader planetarium double polarization filter. (its possible the single polarizer will work but i gotta try the double)

I will probably be able to test this before i leave for colorado because agena is real fast at getting items to me, just need the sun now.

https://agenaastro.com/baader-1-25-doub ... 08340.html

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Re: Narrowest 393.37 ever by Apollo Lasky

Post by marktownley » Sat Sep 22, 2018 6:08 am

Enjoy Colorado!
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Re: Narrowest 393.37 ever by Apollo Lasky

Post by christian viladrich » Wed Sep 26, 2018 8:08 pm

Hi Bob,
Thanks for your test. The incraese of contrast from the Chroma filtre, PST single stacked, PST double stacked and triple stack is clearly appearant.
BTW, I have probably overlooked the information ... what F/D ratio did you used with the Chroma filter in this test ?
Best regards
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Re: Narrowest 393.37 ever by Apollo Lasky

Post by TheSkyBurner » Thu Sep 27, 2018 10:06 pm

christian viladrich wrote:
Wed Sep 26, 2018 8:08 pm
Hi Bob,
Thanks for your test. The incraese of contrast from the Chroma filtre, PST single stacked, PST double stacked and triple stack is clearly appearant.
Sitting here with my new friends at the university of colorado(NSO)

I have just cracked the calcium code of contrast. I developed an energy rejection system, and an Ir cutting calcium correction telecentric here with off the shelf parts. My lens placement is off by 10mm so I will fix it tomorrow to fix the edge-field flatness.

same $25.00 meade 90mm x 800mm. Same Baseler 1300-30gm

I have been sworn to secrecy so do not bother asking me for help. SORRY.
apollo lasky code of contrast1.gif
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Re: Narrowest 393.37 ever by Apollo Lasky

Post by TheSkyBurner » Thu Sep 27, 2018 10:08 pm

The calcium code of contrast, Sworn to secrecy!
apollo lasky code of contrast2.gif
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Re: Narrowest 393.37 ever by Apollo Lasky

Post by TheSkyBurner » Thu Sep 27, 2018 10:10 pm

Calcium code of contrast, sworn to secrecy.

Selfishness will get you nothing. Team work is 100% essential to ALL development.
apollo lasky code of contrast3.gif
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Re: Narrowest 393.37 ever by Apollo Lasky

Post by TheSkyBurner » Thu Sep 27, 2018 10:13 pm

The calcium code of contrast.

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Re: Narrowest 393.37 ever by Apollo Lasky

Post by bart1805 » Thu Sep 27, 2018 10:15 pm

That looks cool and very promising! Congrats!

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Re: Narrowest 393.37 ever by Apollo Lasky

Post by TheSkyBurner » Thu Sep 27, 2018 10:16 pm

The calcium code of contrast.

To those who had faith in my ability, I am continuously thankful for your positive attitude.

:bow2
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Re: Narrowest 393.37 ever by Apollo Lasky

Post by TheSkyBurner » Thu Sep 27, 2018 10:19 pm

The calcium code of contrast.

To those who insulted me, just remember. I will always be 393.37 angstroms ahead of you.

Because I value teamwork.

apollo lasky code of contrast6.gif
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Re: Narrowest 393.37 ever by Apollo Lasky

Post by TheSkyBurner » Thu Sep 27, 2018 10:22 pm

bart1805 wrote:
Thu Sep 27, 2018 10:15 pm
That looks cool and very promising! Congrats!
\\
thanks Bart, it is way better than anything I can present with a $25.00 generic 90mm objective lens

Your Skybender is on its way to your door!

Stay supportive of new ideas, because its people like you that make a new product live well.

:bow2 :movie

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Re: Narrowest 393.37 ever by Apollo Lasky

Post by TheSkyBurner » Thu Sep 27, 2018 10:26 pm

Look at this difference in contrast on my first imaging attempts.. I knocked this calcium stuff out of the solarsystem.!!
:lol:

Image

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Re: Narrowest 393.37 ever by Apollo Lasky

Post by bart1805 » Thu Sep 27, 2018 10:31 pm

Thanks, will first try it out with what I have already. But the things you and Bob showed with the Chroma filter are very tempting.... Curious how the images compare to yours and those of Bob when the Chroma is stacked with a Lunt BF. It is a shame the filters are so expensive. (-;

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Re: Narrowest 393.37 ever by Apollo Lasky

Post by TheSkyBurner » Thu Sep 27, 2018 10:45 pm

the single chroma filter is all you need. No lunt or pst stuff required. Im not even using the chroma 403 filter anymore!

In my opinion the lunt and pst filters are just energy rejection filters in comparison. They are much broader than the single chroma filter. People are going to argue me to death about this, but it is true.

The ir cutter optics i designed are what changed everything.

You do need the skybender however.
apollo lasky IR cutter optics 1.jpg
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Last edited by TheSkyBurner on Thu Sep 27, 2018 10:56 pm, edited 1 time in total.

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Re: Narrowest 393.37 ever by Apollo Lasky

Post by bart1805 » Thu Sep 27, 2018 10:50 pm

Yes, but I happen to have a LuntCakB600, I am not planning to buy one. Solar season is almost over for me, so have a few months to gather the funds.

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Re: Narrowest 393.37 ever by Apollo Lasky

Post by marktownley » Fri Sep 28, 2018 5:09 am

Quite a difference! Came out well. That telecentric is going to narrow the bandpass down from what is achievable in a converging beam I guess.
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Re: Narrowest 393.37 ever by Apollo Lasky

Post by TheSkyBurner » Fri Sep 28, 2018 6:48 am

marktownley wrote:
Fri Sep 28, 2018 5:09 am
Quite a difference! Came out well. That telecentric is going to narrow the bandpass down from what is achievable in a converging beam I guess.
the solar limb now seems to have a crazy 3d look to it.


It made me grin like the cheshire cat when I saw it :D , when I get back home next week I am gonna pop this into my 120mm x 1000mm.

3d solar limb.gif
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The difference in contrast, clear as day.
contrast 2.gif
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contrast 1.gif
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Re: Narrowest 393.37 ever by Apollo Lasky

Post by TheSkyBurner » Fri Sep 28, 2018 7:44 am

this disappearing filament is pretty interesting. I cannot wait to get the real long animations going! http://gifmaker.org/
test.gif
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filament.gif
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------------------------------------------------------

and the beautiful spicule layer!
Frame00437.gif
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Re: Narrowest 393.37 ever by Apollo Lasky

Post by MalVeauX » Fri Sep 28, 2018 12:19 pm

Interesting stuff, can't wait to see how it handles a huge prom group!

Very best,

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Re: Narrowest 393.37 ever by Apollo Lasky

Post by krakatoa1883 » Fri Sep 28, 2018 4:04 pm

A giant step forward, Apollo, congratulations. Does a telecentric beam make some difference ?
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Re: Narrowest 393.37 ever by Apollo Lasky

Post by Bob Yoesle » Sat Sep 29, 2018 3:57 am

Hi Bob,
Thanks for your test. The incraese of contrast from the Chroma filtre, PST single stacked, PST double stacked and triple stack is clearly appearant.
BTW, I have probably overlooked the information ... what F/D ratio did you used with the Chroma filter in this test ?
Best regards
Hi Christian,

That series was taken through an ED100 at the prime focus FL of 900 mm: F/D = 9

As informed by Dick at Chroma Tech, the CT 393.37 0.1 will perform much better in a collimated (or telecentric) configuration, as would any very narrow band filter. Since it is a single cavity filter I would expect it to provide even better performance when implemented in a collimated or telecentric system. But for my tests I wanted to see how it performed directly head to head against what I have readily available in the same f9 system, and if it would make an efficacious stacking filter. It seems the answer is indeed yes.

Per Apollo's latest images, a collimator or telecentric implementation would be even more desirable, and appears to put the single CT 393.37 0.1 filter into the same league as the results I obtained with double and/or triple stacking with the PST CaK filters I have ;-) Not sure how the PST/Lunt filters would perform in a similar implementation.
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Re: Narrowest 393.37 ever by Apollo Lasky

Post by christian viladrich » Sat Sep 29, 2018 7:50 am

Thanks Bob,
F/9 is definetly too slow. I use at least F/15 with my Cak 0.24 nm filter.
BTW, if you have the average index (n) of the Chroma filter, I can try a simulation of the impact of the F/D on the effective FHWM.
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Re: Narrowest 393.37 ever by Apollo Lasky

Post by mdwmark » Sun Sep 30, 2018 6:03 am

Hi Group,
OK Christian, I modeled an filter similar to the Chroma. My design came out 1.2Ang which I though was close enough.

CW Ang HW Ang %of original transmission
at zero deg 3934 1.2 100
At F/30 3933.79 1.23 96
at F/20 3933.54 1.28 86
at F/15 3933.30 1.7 70
at F/10 3932,3 3.2 40
at F/8 3931.7 4.7 28
at F/6 3930 8.3 16
so you still need to worry about the F/# just like any other filter to keep the Hw narrow.
Mark W.

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