Like new condition. Used a couple of times and got all the photos I was after. Feel free to message me for sample photographs, but keep in mind this was my first attempt with astrophotography. I will provide single frame images of Saturn and Mars. Frame stacking and post image editing defines the capabilities of imaging programs rather than the camera's capacity to capture.
Useful Technical Specs:
- Camera's focal length is equivalent to a 7mm eyepiece. For calculating the magnification power respective to your telescope, divide your telescope's focal length by the eyepiece focal length. To determine your telescope's maximum useful magnification, multiply your telescope's aperture, in inches, by 50. Some telescopes may go slightly beyond this during ideal conditions, but it's a fairly accurate approximation.
- The camera's "chip size" is 5.7mm x 4.3mm, compared to it's previous model's 3.6mm x 2.7mm chip size.
- The camera's iCap software, for capturing images in real time, works best on a Windows 32 bit Operating System. This is not rumor, but experience. It will run and work on a 64 bit, but the software may occasionally freeze up.
Similarly, the Registax 6 software, for stacking multiple images, will also freeze occasionally with 64 bit systems.
Just to clarify, all of my computer's hardware is absolute, over the top, overkill. My desktop is legitimately bottlenecked by booting from the Windows 10 64-bit partition. To further clarify, these programs are too much trouble trying to run from a Linux OS.. even from within a Windows shell or compatibility program such as "Wine." Don't waste your time.
On my laptop, results in performance are exact.. but while using Windows 7 64-bit OS.
- An important note that cannot be disregarded:
If you are plugging the camera into a USB 3.0 port (often blue), you must go to Celestron's website and download an update that provides a compatibility fix. Otherwise, your computer will not detect the camera.
For determining the Neximage 5MP TVOF:
**The TFOV (true field of view) for the original Neximage camera is approximately the equivalent of a 5mm eyepiece with 50 degree FOV. To calculate the Neximage 5MP's TFOV, here are a couple of methods for determining this..
To accurately calculate any camera’s true field of view (TFOV) for any optical system, you can use the drift method. On the celestial equator, a star will drift 15 seconds of arc for each second of time.
With the drive of your scope off, let such a star drift completely across the camera's field of view. Multiply this time in seconds by 15 to get the TFOV in arc-seconds. Multiply the time by 1/4 to get the TFOV in arc-minutes. A drift time of 30 seconds corresponds to a 450 arcsecond TFOV or 7.5 arcminutes.
You can also geometrically derive the field of view. Divide the diagonal dimension of the chip of either camera by the focal length of your optical system and then multiply by 206265. The resulting number will be the TFOV in arcseconds. If you are interested in the length and width instead, use those dimensions instead of the diagonal.
I'm not trying to talk anyone out of this camera.. iit is a great device I've captured many images with from my Nexstar 6SE telescope. I've captured 3,000 consecutive frames, multiple times, with both Saturn and Mars. I have used the camera with and without a 2x barlow.
Specs dictate that my optimal setup is without, but I personally disagree, however, those using a Nexstar 8 are suggested to use a 2x barlow. My barlow is an Explore Scientific 2x. When using a narrow with my 6SE, planets become a bigger challenge to find.. and track.. but there are ways of doing so. Binning is a great way, I've found, for locating objects. Once located and centered, the binning can be reverted back to original FOV.
For capturing while using barlow, make note of the objects directional movement. Begin capturing with the object on the side of the screen it's moving away from.. and set the cameras timer to take continuous shots. When the object nears the opposite side of the screen, click to stop the snap shots. Image stacking software will take care of the movement and estimate rotation, leaving you a handful of "best images" selected for stacking.. nice and centered.
This comes with everything included when new. The manual, guide, box, eyepiece adapter, disk, and USB cable.
Good luck, and thanks for looking.
Filed under: Eyepieces & Accessories