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I would like to share my third image.
I finally had a "lucky week", since my last session, December 18th. I managed 5 clear nights out of the past 6 (has to be a record, at least for me and my area) and I was able to finish a couple of projects I had started long ago and start a few new ones.
This is M33, also known as the Triangulum Galaxy, taken over 10 nights, under my Bortle 5/6 home sky.
Total integration time: 10h 14m 00s.
Here are the acquisition details:
Mount: Sky-Watcher NEQ6 Pro
Telescope: Tecnosky 80/480 APO FPL53 Triplet OWL Series
Camera: D5300 astromodified
Reducer/flattener: Tecnosky 4 elements, 0.8x
Guide-scope: Artesky UltraGuide 60mm f/4
Guide-camera: ZWO ASI 224MC
2020/11/08: Number of subs/Exposure time: 11@240s. Notes: L-Pro filter, no Moon
2020/11/09: Number of subs/Exposure time: 10@240s. Notes: L-Pro filter, no Moon
2020/11/20: Number of subs/Exposure time: 15@240s + 4@300s. Notes: L-Pro filter, Moon 30% illuminated
2020/11/21: Number of subs/Exposure time: 22@300s. Notes: L-Pro filter, Moon 45% illuminated
2020/11/24: Number of subs/Exposure time: 20@300s. Notes: L-Pro filter, Moon 75% illuminated
2020/12/13: Number of subs/Exposure time: 12@300s. Notes: L-Pro filter, no Moon
2020/12/14: Number of subs/Exposure time: 8@300s. Notes: L-Pro filter, no Moon
2020/12/18: Number of subs/Exposure time: 6@300s. Notes: L-Pro filter, Moon 20% illuminated
2021/01/10: Number of subs/Exposure time: 9@300s. Notes: L-Pro filter, no Moon
2021/01/11: Number of subs/Exposure time: 15@300s. Notes: L-Pro filter, no Moon
Total exposure time: 36840s = 10h 14m 00s.
Pre and post-processing: PixInsight 1.8.8-7.
Image was Drizzle Integrated and then cropped to original sensor size (6016x4016), without resampling. So, it appears as if taken ad double the focal length (768mm instead of 384mm). Image scale 1.04 arc-sec/pixel.
Here's a link to the full resolution image: Triangulum Galaxy (M33)
Thanks for looking!
Hi All, I have a Star Adventurer but have had problems getting consistent results even when setup was as near to perfect as I can do, (this was focussed on due to this issue).
It took me a while to find out that when the eyepiece is is extended for focus it is very loose, so loose the graticule moves indipendantly of Polaris / background.
I have asked the supplier, "Astroshop.eu", to highlight the problem and ask for their feedback.
Question to Astroshop.eu:
I have had a constant issue with Polar Alignment. As I cannot use it so often, (visibility), it has taken me a while to identify the problem. When I adjust the polar scope focus the eyepiece is so loose that the graticule moves a lot laterally in all directions in the view. I can send a video but I think you can understand what I am saying.
Basically I must be getting something very wrong or there is an issue with the product. The thread is so loose it is entirely unstable.
Please advise what we can do about this.
Answer from Astroshop.eu:
1. "I'am sorry to say, but this is very normal and does not affect the function of the star adventurer".
2. "My collegue confirmed that this will not be a issue".
I have subsequently asked the guy to ask his colleague again, but some time has gone past and I have no further reply.
I think it is clear enough from the text and would really appreciate some experienced answer, any comments very welcome.
Additionally here are the videos I have sent to show them, (hand holding the phone so a bit shaky but issue can be seen. I'd really appreciate some help before I spend too much time again tring to get it to work, for reference the eyepiece wobble is around 3.5 graticule intervals, so not small. As it's full of grease it took me a long time to see how poor quality the Polarscope build quality is.
Thank you all, Andy
Just thinking how this setup would compare to normal astrophotography setups. Imagine a Nikon coolpix p1000 on an equatorial mount. Has anyone done that yet?
As I saw in the YouTube videos about the camera, it has absolutely no chromatic aberration, so I assume it's got apochromatic lens. It's magnification is extremely good (125x with 16MP sensor). The aperture is quite small tho compared to many different refractors available.
So what do you think about the idea: astrophotography with a Nikon?
I'm new to the astrophotography hobby. I have experience with astronomy. I am struggling to make decent deep sky images (other than M42). The images don't seem to have much definition or brightness despite a decent overall exposure time. See the below images. I have seen on this forum that people are able to take awesome images of the below objects with my same setup. Is anyone able to tell me if I am missing something, please? Do I need even more exposure time?
I use a Celestron 6SE with unmodified Canon 600D. It has a goto alt az, no EQ. I use a bahtinov mask to focus. Both images were taken with the native focal length of 1500mm, no filters or eyepieces.
The image of the Triangulum Galaxy is 180 x 15sec ISO800 images. The Crab Neb is 250 x 15sec ISO800 images. Both images had their appropriate flats, darks and biases (30 of each). I use SIRIL to stack the images, which I have had good success with M42 before (see below).
Any advice would be appreciated!
I've been into astronomy since I was young and more recently astrophotography. I've just (finally) got my new telescope, a Celestron AVX 9.25" Edge HD with various accessories including a reducer lens. I'm still trying to get the auto guider up and running as that's being a pain and need to get a dew heater for the telescope (currently lookjng for a decent one). I'm also looking into what filters to get as well as that's still fairly new to me, at least for the astrophotography side.
I'm also very much into microscopy and looking at microphotography, I'm currently saving up to get a new microscope.
I've also got a facebook group where I share astronomy and science news, where members can share astronomy and science news or their own astro or science images, discuss things, etc. https://www.facebook.com/groups/2494142714158646/?ref=share
Anyway, hello to all from Cambridge, UK :-)