21 May 2024 - Ca K and 393-3 nm images

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christian viladrich
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21 May 2024 - Ca K and 393-3 nm images

Post by christian viladrich »

Hi,

Weather has not particulary good down here ...

Here are some images taken on May, 21st during a short clearing.

FD image taken with the Altair 393-3 nm :
http://astrosurf.com/viladrich/astro/so ... 93-3nm.jpg

FD with the Alluxa Ca K 0.14 nm (stacked with an Edmund Optics 393-3 nm). Some proms are visible here and there :
http://astrosurf.com/viladrich/astro/so ... -014nm.jpg

Then I pushed the focal length while keeping the IMX533, just to test this configuration. Not surprisingly, the optical quality is not so good on the outside of the view of view. The Airylab telecentric is not designed for such a "large" sensor. The workable field of view seems to be in the range of 2000 x 2000 pixels, which is fine for large sunpot groups. The IMX 533 is doing pretty good even when only 60 frames are stacked.

These are double-stack images (0.14 nm + 0.14 nm). The filter tilt is tuned with the Sol'Ex spectro. Tuning of the second Ca K filter is rather touchy, even with the RAFcamera tilt mount.

I've found out that "tuning by eye" is OK as long as only one Ca K filter needs to be tuned. But when two filters are to be tuned (= tilted), tuning with the spectro is definetly more accurate.

http://astrosurf.com/viladrich/astro/so ... CaK-DS.jpg

http://astrosurf.com/viladrich/astro/so ... CaK-DS.jpg

http://astrosurf.com/viladrich/astro/so ... CaK-DS.jpg

Clear skies !

Christian


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Re: 21 May 2024 - Ca K and 393-3 nm images

Post by ffellah »

Magnificent images, Christian. Is this with the Saturn M camera ?

Franco


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Re: 21 May 2024 - Ca K and 393-3 nm images

Post by LeoD »

Stunningly detailed, clear and crispy, to be accompanied by a glass of champagne zero dosage!
What fps did you use for 533 camera?
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Re: 21 May 2024 - Ca K and 393-3 nm images

Post by vineyard »

That CaK altair filter looks intriguing. As for the detail in the double-stack ones, yowsa!


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Re: 21 May 2024 - Ca K and 393-3 nm images

Post by Dennis »

Beautiful images Christian. I wonder if the Baader TZ3 / TZ3s produces a large enough corrected image circle.


Triband C9.25

H-a: 2x Lunt40 rear mounted

WL: Antlia 500nm/ 3nm, 393 nm/ 3nm

Ca-K: homebrew (includes 2x 1.5A filters, thanks Apollo), corrective lenses (thanks again Apollo)

Cameras: imx432 + imx462
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Re: 21 May 2024 - Ca K and 393-3 nm images

Post by rigel123 »

Stunning images Christian!


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Re: 21 May 2024 - Ca K and 393-3 nm images

Post by christian viladrich »

Thanks guys !
Dennis wrote: Wed May 29, 2024 1:40 pm Beautiful images Christian. I wonder if the Baader TZ3 / TZ3s produces a large enough corrected image circle.
I have no idea. The Airylab is a divergent doublet associated with a convergent singlet. Unfortunatly, I can't simulate the TOA 150 + Telecentric in OLSO because I am limited to 10 air-surfaces.
Not sure whether the TZ3 has three or four lenses ?
LeoD wrote: Wed May 29, 2024 12:26 pm What fps did you use for 533 camera?
fps for the FD images is about 40 fps (8-bit acquisition). For close-ups, it goes up to about 100 fps when the image is cropped to about 2000 x 2000 pixels. But I have not checked the exact figures.
ffellah wrote: Wed May 29, 2024 10:18 am Magnificent images, Christian. Is this with the Saturn M camera ?
Yes it is, Player One Saturn M SQR with the IMX533 sensor. It is much faster than the equivalent ZWO model.


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Re: 21 May 2024 - Ca K and 393-3 nm images

Post by KMH »

Beautiful images and processing! I really like the "look" provided by double-stacked Ca.

Kevin


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Re: 21 May 2024 - Ca K and 393-3 nm images

Post by Valtori »

Incredible CaK DS images, Christian!!

Val


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Re: 21 May 2024 - Ca K and 393-3 nm images

Post by DeepSolar64 »

Awesome work Christian. Absolutely stunning!!

James 😊👍🏼👍🏼


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Re: 21 May 2024 - Ca K and 393-3 nm images

Post by Carbon60 »

Superb, Christian.

Stu.


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Re: 21 May 2024 - Ca K and 393-3 nm images

Post by Dennis »

They dont state how many lenses are used, but i always thought a telecentric is made from 4 lenses. Even if we knew i doubt they would share the design for simulations.


Triband C9.25

H-a: 2x Lunt40 rear mounted

WL: Antlia 500nm/ 3nm, 393 nm/ 3nm

Ca-K: homebrew (includes 2x 1.5A filters, thanks Apollo), corrective lenses (thanks again Apollo)

Cameras: imx432 + imx462
Barlows:
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-2x TMB 1.8x
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Re: 21 May 2024 - Ca K and 393-3 nm images

Post by arnedanielsen »

Impressive results as always, Christian! Thanks for sharing!


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Re: 21 May 2024 - Ca K and 393-3 nm images

Post by marktownley »

Stunning pictures Christian!

When double stacking I have found the filter closest to the objective is the filter that has natively the least amount of tilt to get it on band, is the one that I have to tune each time to get on band. The secondary filter (closest to the camera) is tilted to throw the reflection / ghost off the image.


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