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Photo of STF 2

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#1 Far Star

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Posted 05 December 2019 - 11:50 AM

STF 2 (= SAO 4048)

 

m = 6.68 / 6.89; sep. = 0.93"; distance ca. 344 light-years; photo taken on 12/03/2019 with APM 140/980 mm SD Doublet Refractor and 3.3 x Barlow, ISO 6400, 1/60 second exposure time

 

STF 2 is located near Errai (Gamma Cephei).

 

 

STF-2-20191203-140-980-Refraktor-3.3-fac


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#2 Jon Isaacs

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Posted 05 December 2019 - 12:09 PM

:waytogo: Excellent..

 

0ne thing I like about images of doubles is that the look very much like the do in the eyepiece. 

 

Looking at your image, It makes me think: "Now that's the kind of imaging I could get into."

 

What camera did you use?

 

Jon


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#3 payner

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Posted 05 December 2019 - 12:14 PM

Yes, that is a fantastic image. Thank you for posting.


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#4 Far Star

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Posted 05 December 2019 - 03:24 PM

Thank you very much. The picture of STF 2 is a single frame taken with my Canon EOS 800D (the best one of 150 single shots). There was no post processing of the image done other than cropping of the image and enhancing the contrast with the freeware IrfanView. Increasing the contrast significantly improved the image by reducing the "veils" caused by seeing.


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#5 Jon Isaacs

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Posted 05 December 2019 - 04:45 PM

Far Star:

 

Thank your for the camera information.  I really like the minimal processing, That's why it looks like what one might see in the eyepiece. 

 

I am sure one could do stacking and various forms of signal processing to extract the centers but then it wouldn't look like what I see in the eyepiece.

 

What did you see in the eyepiece or did you look?

 

I am getting a little bit excited.  :whee:

 

The seeing here can be quite good, I have a very good EQ platform and my 10 inch Dob has quite good optics, at least for splitting doubles.  

 

I'd probably start with Albireo or gamma Andromedae. 

 

Jon



#6 Magnus Ahrling

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Posted 05 December 2019 - 06:29 PM

Far Star!

 

Impressive image of a 0,93" double starwaytogo.gif

 

I agree with Jon; images of double stars are very similar to  the impression  (to me!) visually at the eypiece. Makes it fun to compare.

 

-Magnus


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#7 Far Star

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Posted 05 December 2019 - 06:41 PM

Thanks Magnus!



#8 Far Star

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Posted 05 December 2019 - 07:16 PM

Jon and Magnus:

 

Looking through the eyepiece, I saw two circular Airy discs in the very short moments with steady air, which touched each other. The sight was similar to the picture above, but on the photo, the two stars are (surprisingly) a tiny bit more clearly separated.

 

Astronomy has been my hobby for more than 50 years. Until recently I only observed visually. Six months ago - after retiring - I started astrophotography with my DSLR and focus exclusively on double and multiple stars (and try to keep it simple). That's a lot of fun!  smile.gif


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