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Thread: Filming the moon with ZWO 120mc-s

  1. #1
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    Default Filming the moon with ZWO 120mc-s



    Hi friends

    I enjoy filming the moon with my little Celestron 4SE with a Canon 7D

    Im pretty happy with the results I am getting but have been looking at buying a ZWO 120mc-s camera to get better quality.

    Ive read about the ZWO pixel sizes and I think the ZWO sensor is more sensitive than my Canon which is just made for general use rather than Astro photography.

    I will freely admit I dont fully understand the real ins and outs of how the sensor size, resolution and pixel size effect the captured image/video.

    Now the trouble Im having is finding good quality example vids using the ZWO camera? Ive found a few on youtube but they either look much lower quality that I am currently shooting or out of focus (the number of moon vids that are out of focus drives me mad! even using great scopes).

    Here is a link to what Im getting at the moment with my current set up.



    Any decent links to vids using the ZWO 120mc-s would be most welcomed.

    I would like to buy one but want to make sure Im stepping up in quality rather than down.


    Much respect

    buddsy

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    Default Re: Filming the moon with ZWO 120mc-s

    Hi, I don't own a ZWO 120 but I think moon astrophotography depends on frame rates - higher the better, and then processing the video in Aotostakkert!, Registax or PIPP. Your Canon has higher resolution but as the moon is small, the sensor is largely capturing unneeded blank space. With the ZWO you can capture a smaller part of your image, and home in on a crater. An ADC is used to get better clarity to combat atmosphere distortioons. AP is more about image, not video quality.
    Please correct if I am wrong, I am not very experienced yet.
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    Default Re: Filming the moon with ZWO 120mc-s

    Hi thanks maybe Im in the wrong section? I did wonder why there was no videos in the video section!

    Maybe a Mod can move me to the correct section.

    thanks

    buddsy

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    Default Re: Filming the moon with ZWO 120mc-s

    this is your fov with the asi 120 in the red box, the yellow is your current camera with your scope


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    Default Re: Filming the moon with ZWO 120mc-s

    I think it is quite possible that you are thinking about this differently than other AP people do. When I use my ZWO ASI120MM I want to convert the captured data (.ser or .avi) to a single image (.tiff, .jpeg, .bmp). The reason for doing this is that you can effectively get rid of atmospheric distortions you will have. Once the data is converted to a image file there are programs that you can alter the image to your liking.

    As explained, there are programs (Autostakkert is one of them) out there that convert the video file to a image type file. Unless there is going to be something interesting happening (.ie a meteor hitting the moon) it is pretty much a static body. Not many people would spend hours watching a video of the Moon. (I could be wrong)

    Your 7D is a tool a lot of use wish we could have.
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    Default Re: Filming the moon with ZWO 120mc-s

    if you want to do animations,video of the moon at full size for your focal length you might want to look at a camera with a bigger sensor like a asi 1600 ,asi071,asi094,asi294

    id' probably recommend the asi294mc or similar given the size of the chip and price
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    Default Re: Filming the moon with ZWO 120mc-s

    Quote Originally Posted by buddsy View Post
    Hi thanks maybe Im in the wrong section? I did wonder why there was no videos in the video section!

    Maybe a Mod can move me to the correct section.

    thanks

    buddsy
    I started to make a reply regarding this but it went too long and could have hijacked the thread so I started another. You may find it interesting - or not. A One-Person Perspective on what we do - and sort of why

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    Default Re: Filming the moon with ZWO 120mc-s

    First let me say that I will gladly trade my ZWO120 mono for your Canon. I will pay the shipping for both and in fact pay I you want UPS to do the packing.

    The field of view is a determined by the telescope's focal length and the diagonal size of the camera sensor and not the number of pixels. you can do the math or just use the tools at https://astronomy.tools/calculators/ccd You can think of the sensor dimension as roughly the same as an EP focal length, the shorter the focal length the greater the magnification and narrower the field of view.

    As shown in the comparison image posted above the 120 cannot show the entire 30 arc second width of the moon. Contrary wise is you zoom or crop the cannon image to show the same area as the 120/

    The Cannon and a 4x Barlow or a 4x zoom or similar crop will show the about same image size as the 120 at about the same resolution.

    The 4Se ( a nice little Maksutov) f/13 1325mm focal length has a narrow field of view. The moon is a so bright that sensitivity is not the critical factor in selecting a camera. The only advantage the 120 might have is size and weight and if you are working already with the Cannon then there is no advantage.

    If you catch some sessions on NightSkiesNetwork.com you will see a fair number of ZWWO cameras in use as well as some DSLRs. What you won't see are many 120 cameras. I have one and it it gets switched between the guide scope and (with its factory fisheye) duty as an all sky cam. because there are better and more versatile cameras. When I view the moon it is with a 294 (a 4/3 sensor) at f/7, zoomed or ROI to suit. I don't lucky image the moon so at 100% I don't incline to use a Barlow or switch to a 1/3 sensor camera (like a 290 or 224).

    There is a related consideration and that is the resolution of you display. Mine is the common HD 1920 x 1080 which means that whatever the camera resolution everything you see is scaled to HD. For my 294 or your Cannon you can either look at that part of the full frame image that fits an HD display or scale a larger section down to HD and throwaway the extra data.

    To widen the field of view (decrease the focal length) you should consider a focal reducer. The Celestron f/6.3 (called that because it reduces an f/10 SCT to f/6.3 making it a .63 reducer should work reasonably well with the Canon (some vignetting possible) and width a 120.forum. But see what happens when you add a focal reducer or a Barlow the Field of View Calculator.

    The 120 just can't see the full moon.
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