10-16-2016 04:26 PM - edited 10-16-2016 04:32 PM
Yes, well explained, thank you for your generous consideration. I am mainly interested in researching zoom powers in order to take images of what looks like someone holding the Moon on their shoulders, in their hands or bouncing it like a ball. lol I only have a 55-250mm and it's just not quite long enough. Thanks again.
This could be estimated fairly accurately by calculating the AOV, Angle-Of-View, of the Moon against that of your subject with their hands spread. I have never done it before, BTW
The night sky is basically a half circle, 180 degrees. I cannot recall how many degrees of the sky that the Moon occupies, but let's say that it is 0.5 degrees. If you go to an online Canon vendor, you will see a specification listing for Angle-Of-View for every Canon lens.
Let's say that a lens gives you 40 degress of AOV. This means that you could fit 80 Moons side by side across your image. I've been tweaking the various Moon photos I took last night. The one posted earler was the first one I processed.
I took some shots with filters, without filters, and different exposures and focal lengths. The above was shot with the same lens and settings, but with a a different camera, 6D, and no CPL filter.
04-26-2017 11:03 AM
I'm sure I've posted this same image elsewhere on the forums, but I just noticed this thread so I thought I'd add it to the list.
I shot this image of the Andromeda Galaxy (M31) and companions (M32 & M110) using a Canon EOS 60Da.
The image was shot through a TeleVue NP101is apochromatic refractor -- a 101mm refractor (that's the aperture size of the objective lens) with a 540mm focal length (f/5.4). The telescope was mounted on a Losmandy G11 mount. This shot is the resuult of collecting several 8 minute exposures which were then stacked and ultimately processed to bring out the color (the out of the camera shot nearly looks monochrome - color is very subtle). This represents a few hours worth of data collection and many more hours of procesing.
A larger version is here: https://flic.kr/p/AZ1K5j
You can see a sample of what a (mostly) straight out the camera frame looks like here: https://flic.kr/p/B18eTQ
(I say "mostly" because I slightly adjusted contrast on that image.)
11-18-2017 06:57 PM - edited 11-18-2017 07:01 PM
First, and foremost. I really do not know anything about astrophotography, and still climbing the mountain when it comes to general photography. Translation. I have been saving every photo I have taken for years.
I have been backing up photo archives this weekend. Of course, I ran across photos that I want to piddle and dabble with the settings again. And, I ran across a few of my early attempts at astrophotography.
I am 18 miles from Times Square, in NYC. That means B&H delivers to my door in less than 24 hours. But, it also means that I have to drive for HOURS, and hours, to find dark sky. Knowing that, I took some shots in my backyard, anyway.
i wanted to get a measure of how much light pollution I was facing from my backyard. On your average summer night, you cannot see any stars in Times Square, due to light pollution. At my location, we can see many stars, but on a humid night you can barely see any stars, because of light pollution.
The best time to shoot photos is on a clear fall or winter night. I took some shots three years ago in late November. My initial reaction had been that all of the talk about light pollution was correct. But, I ran across this, my first shot, and decided to try to apply some noise reduction techniques that i have learned since I took the photo.
Canon 6D and Rokinon 14mm T3.1. This was a 20 second exposure, at ISO 1600, with an aperture setting of T3.1, which is approximately f/2.8. I tried to clean it up, but was somewhat disappointed. Then, I viewed this shot on my PC without all of the room lights on, and my jaw dropped.