Posts Made By: Gianluca Valentini

Hello everyone,

Had the time to shoot some sequences on the 24th. The sun was rather sleepy apart from NOAA 0801, a huge quiescent prominence (already posted in beautiful images by Harald and Stefan) and only one single small filament. We seem to be really approaching solar minimum

However attached is an image obtained with my usual set up (Tak 102 @ F24, solarmax 90/BF30 and Lumenera 075C). 200/1000 (alas not manually) in Iris 5 and processed entirely in Photoshops with levels, colors and unsharp mask.

Ciao guys

Luca 8)

Hello everyone

always more frequently I happen to read in many of your posts of "multiple alignment points".

Now, how does one go about processing with multiple alignement points In Registax 3?

Do I have to process the file several times (as many as the alignment points) and then stack the different resulting files?

If it is so, Should I process the different files resulting from the different alignment points before or after stacking them?

Thanks for any help you can give me.

Ciao
Luca
8)

Sorry guys,

but I am in need of some medical info regarding U.S. clinics and I have no one I can ask: anyone can help?

Ciao and again sorry for the off topic post, but I really need some help and I don't know where to turn to. Nothing serious, thank God, but I need it anyway!

Ciao all

Luca 8)

Hello Robert,

You sure did some high resoultion imaging here

I believe the formula to calculate your image scale is:
size in microns of the pixels of your imaging device / your focal length in millimeters and the result then multiplied by 206. The result will be ALREADY in arcseconds per pixel
In your case: if you were actually imaging at F50 then your focal length in millimeters would have been 14,000; the pixel size of the LU075 is 7.4 microns. So your image scale is an astonishing 0.1 arcseconds per pixel (7.4/14000*206= 0.108.....).

Ciao Robert and congratulations on the image: considering the resolution it is incredibily smooth and well detailed.

Thanks for posting it.

Luca 8)

Hello everyone, and forgive me for breaking up the beatiful sequence of Mars images: It is, after all, a great event.

After many days of rain and then very thick fog today the sun made it through to my chip.
It is official: in white light the sun is totally asleep. A great white immaculate (and a little boring) ball. In the light of H-alpha, the situation isn't that much better: only a long filament and a few quiescent prominences. I captured something that may have been indicative of a small activity, but I can't be sure as I haven't yet processed the sequence.
I then tried to image this nice little "prominences' field" showing a very intricate central structure that captured my attention. There was a much bigger prominence, but I liked this one better
I used my max focal length here (approx 2050 mm @ F22.5): I should have had a 4X barlow to bring it at least at 3200 mm @ F36 I have a 5X, but believe that the Coronado BF30 is for focal length within 3000 mm and a 5X would get my system beyond 4000.


The image was aligned and stacked in registax (300/1000 stacked) and processed entirely in Photoshop (no wavelets, only levels and UM). Hope you like it.

Ciao
Luca 8)

Hello solar bunch!

I was wondering if somebody among you has tried to push the combination SM90/BF30 beyond 3,000 mm focal length.
When I asked, Coronado replied that I should experiment loss of contrast and vignetting the more I go above 3,000 mm. My system has a native focal length of 820 (Tak 102) and I would like to use a 4X Powermate that would take me to almost 3,300.
Is there going to be a noticeable loss of contrast?
Vignetting will occur only for large CCDs or even for a sub-2Mpixel chip?

Hope somebody has some experience here. If not, I'll try and keep the forum posted on the results (provided the weather co-operates :C )

Ciao all

Luca

Hello everyone,

after a long time since I received my Infinity 2-1, I was able to see the sky through the clouds and immediately went out to try my new toy The sun was not a great target and I still have some issues to solve with the new camera and the Coronado. The only available target was then the moon and luckily it remained available for a little while in the early evening. The seeing was not cooperating at high resolution so I stayed at F10 and added an R+IR filter.

Here are the data on the image:
UTC 18:07
Celestron 11" @F10
Lumenera Inf. 2-1+R+IR filter at 15fps, 12bit mode and full frame (1392x1040). 114 frames of 700 manually selected and processed in Iris and PS. The final image has been cropped and resized to 80%.
Gotta love big chips

Ciao
Luca 8)

Hello guys,

after reading in many of your posts that people were using more and more often a multi-alignment point technique, I decided I had to try if I could use it too.

The alignement part is easy, although time consuming, but the image composition/mosaic is true hell

However, it seemed as I managed to improve on the 1st image obtained with a single alignment point on Copernicus keeping the "patched" areas almost invisible.

Please any comment would be really appreaciated.

Data:
Copernicus Jan 11th UTC 00:12
Celestron 11" @ F10
Lumenera Infinity 2-1+R+IR filter

148/700 frames at full resolution and (nominally) 15fps
aligned and stacked in Iris 5.1; Photoshop for final touch ups and mosaic.


Sorry for the size, but I wanted to keep it at 100% to avoid hiding possible mosaic traces.

Ciao
Luca 8)

Hello,

as Monty Pithon used to say "and now for something completely different".

I'm processing a few test sequences with the Infinity and a Coronado filter. The sun was very low in the sky (I think a little above 20°) and the seeing wasn't great, but the camera proved to work fine even on the sun: now I just have to learn how to use it properly

However, time data are on the pic. Taken at F22.5 with Takahashi 102 and Solarmax 90/BF30. I used Iris to align and stack (100/700 frames) and PS to touch up and colorize.

Ciao all

Luca 8)

PS I plan to try the multiple alignment technique also on this picture, as there is a striking difference between the right and and the left side. Soon I'll give it a shot.

Hello guys,

I'm not very happy about this image, but it is still one of the best I've been able to capture lately

The weather is turning from bad to terrible here, so I have little hope to do anything better in the near future. I try to process the last sequences I took very slowly so I always have something to process awaiting for better times :C

Lumenera Infinity 2-1 & R+IR pass filter
Celestron 11" at F25
100/700 frames stacked in Iris (only one alignment point, for now)
Levels and UM in PS.

Ciao

Luca 8)