M13

Posted: Nov 27th, 2019

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NGC

Technical Info

Telescope/Lens: Sky-Watcher 102/1300 Mak

Camera: Canon 1300D

Mount: Sky-Watcher AZ-GTI EQ mode

Software: DSS,Fitswork, Photoshop

Accessories: ASIAIR

Exposure:

30 x 60" ISO/Gain: 800

Yellow zoneLight Pollution:

Velikie Luki, Russia

30 m

2239

Out of focus, as a test of imaging capability at 1300 mm on a small mount. October 2019.

Resolution: 1800x1568 px

Scale: 3463 KB

Andrey Afanasev

105

Updated

M 13

7 Mar, 2022

48 m

И еще один шаровик, в Геркулесе.

M13

7 Feb, 2020

40 m

Current photo

M13

27 Nov, 2019

30 m

Не в фокусе, как проверка возможности съемки 1300 мм на маленькой монтировке. Октябрь 2019.

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Comments

Dyadya Vova

When was this taken? ;)

27 Nov, 2019 Reply

Andrey Afanasev

From 7:00 PM to 8:00 PM on October 19.

28 Nov, 2019 Reply

Smirnov Andrey

How was focusing done? It seems like there might be some defocus present.

28 Nov, 2019 Reply

Andrey Afanasev

Do you actually read the photo captions? :) This is the first series with the MAK, it wasn't cooled down before shooting. That's how we learn. :)

28 Nov, 2019 Reply

Smirnov Andrey

Of course I read it, that's why I'm asking. I'm generally interested in the approach to this issue. What do you use: a mask, FWHM, by eye?..

28 Nov, 2019 Reply

Andrey Afanasev

First in LiveView on the camera screen, now by FWHM in Asiair. There's a focusing mode there that displays a numerical value in arcseconds.

28 Nov, 2019 Reply

Smirnov Andrey

I focus using FWHM only on the guide camera. For the main camera, I prefer more reliable methods—using a Bahtinov mask, and I trust the accuracy assessment not to my own eyesight, but to the Bahtinov_grabber software. I recommend it!

28 Nov, 2019 Reply

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