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I continue with my Star Adventurer experiments how to get the most out of it.
I can notice when I taking 120 seconds exposures with my Star Adventurer mount and the 150 mm camera lens I sometimes get elonged stars. And with that long exposures also the brighter stars oversaturate.
How will my equipment perform if I take more and shorter exposurers, can my Canon 6D handle that? It has relative low readout noise at higher ISO settings but limited dynamic range then.
Here I have done two tests to compare:
At least in this case I feel the camera can handle the shorter exposure and still have good dynamics.
I live close to a big city, but I have found two places out in the east close to the coast where I have a relative dark sky. With my small Star Adventurer I can easily go out there and doing astrophotographing.
Almost all my earlier AP have been done with a very lightpolluted sky.
Hi All, I am posting what I suspect is a newbie mistake question but hoping that someone can assist with the issue of flats.
Although I have been fumbling around the sky, taking snaps at leisure, recently I became serious. I have read up about the different calibration files (flats, darks, bias) and they seemed to make sense; different ways to capture the image defects and extract those from the image of the sky. After a few weeks (months) of further fumbling I went back to the very first target to receive my attention, M42 Orion Nebula.
In short, I took 20x 30s exposures in LRGB and ran these along with 20x LRGB each of darks, bias and flats. To obtain the flats I used a diffuse sheet of perspex (lightbox material) and an LED video lamp that has 180 white LEDs, turned to its lowest setting. Attached below is the stacked Luminance flat and the light image. In the lights I am getting very strong marks from dust and I had thought that the flats would subtract this but looking at the flats the marks are completely different shapes and do nothing to remove them from the lights.
The attached has been further stretched to show the issue. Now, I am obviously doing something wrong but I have no idea what, any pointers from the vast pool of knowledge will be much appreciated.
My first ever M31 !
For us in NZ this object is a real challenge as it never rises more than a few degrees above the horizon.
This is actually as high as it gets and I have included a wide field shot to demonstrate its position at the moment.
Coupled with fairly ordinary seeing I’m really rather proud of my first attempt.
It really tested my polar alignment and my excellent star adventurer Mount.
There is a nasty gradient and it’s a bit brown but apart from that I can see dust lane ! I’m still saving for pixinsight as I suspect there maybe more info in this image.
All comment and criticism is welcomed.
75-300mm @ 300mm
32X120 seconds ( 1 hour 4 minutes total integration)
Processed in photoshop and Lightroom
By Paolo Silvestri
Hi everyone, I recently decided to get a 70-200 f2.8 lens or similar (liek 80-200 nikkor) to mount on my Nikon D3300 and Star Adventurer, because as a landscape photographer I feel I will use way more a tele lens than a telescope. It will be a graduation present, so I hope no budget limit. My question is: which lens to choose? In order to capture some extra details I'll most likely add a teleconverter 2x if the choice will be a 70-200, otherwise I'm considering a 100-400 Sigma or Tamron but I can't find anything about how they perform. Thanks for your advices.