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Lou took this great image of a prom with his Lunt152 double stacked with a Quark

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Moving forward from solar cycle 24 to 25

From June 29 and 30

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gabrieli
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From June 29 and 30

Post by gabrieli » Sun Jun 30, 2019 9:48 pm

These images are a first light for a new FLIR camera (a 2/3", 2.8Mp, 130f/s).
The first 2 images were taken with this camera and a Lunt 152 + Quark chromosphere and the last 2
with an Aries ERF in its new cell on a c9.25 + 3x telecentric + Quark Combo chromosphere starting
at 12:30 pm on consecutive days.

I took the time to mark a good balance point for the c9.25 setup on the mount for quicker assembly in future.

Seeing was poor especially for the larger setup in addition to the prom being very feint.
More processing was done than I normally use and there are artifacts that show this.

Lou
458.jpg
458.jpg (393.31 KiB) Viewed 372 times
1078.jpg
1078.jpg (721.41 KiB) Viewed 372 times
552a.jpg
552a.jpg (630 KiB) Viewed 372 times
294.jpg
294.jpg (340.22 KiB) Viewed 372 times
180f.jpg
180f.jpg (237.43 KiB) Viewed 372 times
DSC00049.JPG
DSC00049.JPG (1.18 MiB) Viewed 372 times
DSC00050.JPG
DSC00050.JPG (1.21 MiB) Viewed 372 times

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Re: From June 29 and 30

Post by marktownley » Sun Jun 30, 2019 10:56 pm

These look great Lou! Do you have a link to the new camera?
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Re: From June 29 and 30

Post by gabrieli » Mon Jul 01, 2019 12:01 am

Thanks for the comment, Mark.

Here is a link to the new camera on the FLIR website. Scroll down for the specs.

https://www.flir.ca/products/blackfly-s ... U3-28S5M-C (Canadian site)

FLIR seems to be changing their webpages fairly often these days. You can view the prices in your location by clicking on the globe in the upper right of the page.

Lou

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Re: From June 29 and 30

Post by Valery » Mon Jul 01, 2019 3:30 am

Hi Lou,

Very nice start with new equipment. And pretty looking setup.

You definitely need to try to image the sun early morning if you have such an opportunity. During last four years I imaged the sun mostly early to mid morning. Good seeing is a very rare event after 9:30 at my location.
Also I do not see in the equipment train any word about focal readucer. This camera has small pixels and the image scale F/D>30 require at least 0,6x reducer for optimal image sampling. Oversampling decreases the ability to freeze the seeing because you need longer exposure.

Valery
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Re: From June 29 and 30

Post by gabrieli » Mon Jul 01, 2019 11:28 am

Thanks, Valery

I have access to the sun in the east from about 10 am and later. Even at the earliest, I would be aiming close to the tops of houses with their hot roofs.
I agree with you that ideally a focal length of about 4500 mm would be ideal for the 4.5 µm pixels in the sensor. I plan to try my 2X Televue Powermate next to give about 4600mm and short extension and separately a 0.63X Celestron reducer with the 3X telecentric to give about 4300X. I have 2 " nose piece and accessory adapters for this 0.63X reducer to allow attaching the 3X telecentric but then there is a long over hang at the back of the C9.25. I've used these accessories in the past but the weather is never consistent enough to develop the setups that I've tried.

Another combination that I will try is the regular Quark with a 0.5X reducer to give about the same image scale and keep the extension short. So far, we have had the worst spring weather in some time here with lots of clouds , let alone good seeing.

Lou

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Re: From June 29 and 30

Post by Montana » Mon Jul 01, 2019 11:28 am

Beautiful prominences Lou, the camera looks good :hamster: :bow

Alexandra

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Re: From June 29 and 30

Post by MAURITS » Mon Jul 01, 2019 2:19 pm

A great session here Lou.
Regards,
Maurits

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Re: From June 29 and 30

Post by Carbon60 » Mon Jul 01, 2019 5:53 pm

A productive session, Lou. Nicely done.

Stu.
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Focal reducer 0.5x with Quark setupquery

Post by Boso36 » Sat Oct 12, 2019 3:12 am

gabrieli wrote:
Mon Jul 01, 2019 11:28 am
Thanks, Valery

I have access to the sun in the east from about 10 am and later. Even at the earliest, I would be aiming close to the tops of houses with their hot roofs.
I agree with you that ideally a focal length of about 4500 mm would be ideal for the 4.5 µm pixels in the sensor. I plan to try my 2X Televue Powermate next to give about 4600mm and short extension and separately a 0.63X Celestron reducer with the 3X telecentric to give about 4300X. I have 2 " nose piece and accessory adapters for this 0.63X reducer to allow attaching the 3X telecentric but then there is a long over hang at the back of the C9.25. I've used these accessories in the past but the weather is never consistent enough to develop the setups that I've tried.

Another combination that I will try is the regular Quark with a 0.5X reducer to give about the same image scale and keep the extension short. So far, we have had the worst spring weather in some time here with lots of clouds , let alone good seeing.

Lou
Hi Lou,
I am trying to reduce my F25 imaging train in my Quark Chromosphere with a 0.5x focal reducer (1.25 inch Datyson focal reducer).
My imaging train from the back of the 2 inch visual back of my F6 scope (F=420mm;D=70mm) is:

1.25 inch uv/ir filter;
1.25 inch diagonal;
Quark chromosphere
0.5x focal reducer (screwed onto the end of)
Standard nose tube
ZWO ASI120mm

I cannot achieve focus at present. What do I need to get focus?

Thank you.
Magnus

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Re: From June 29 and 30

Post by gabrieli » Wed Oct 16, 2019 10:39 am

Hi, Magnus

Sorry about the delay in answering you. Here's my suggestion for finding focus.

Find focus without the focal reducer first. Then after you add the focal reducer, you need to focus inwards to find the new focus since focal reducers converge the light cone more than before. Also try to shorten the imaging train by eliminating the diagonal. This might give you more in focus travel.

If this doesn't work, the only other option is to use a "weaker" focal reducer (greater than 0.5X), assuming you can't shorten the tube.

Hope this helps.

Lou

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Re: From June 29 and 30

Post by marktownley » Wed Oct 16, 2019 7:23 pm

You need to use a 2" diagonal really Magnus. You could put 1.25" extension tubes in but you will likely get sag which takes the quark off band.
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Re: From June 29 and 30

Post by yltansg » Sat Oct 19, 2019 7:15 am

Hi Lou,

You must be glad to see lots of close-up features. Looking forward to see your images with other configurations. Great info for me when using a Quark.

Alfred

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