What is the focal ratio for astrophotography?
Fast f/4 to f/5 focal ratios are generally best for lower power wide field observing and deep space photography. Slow f/11 to f/15 focal ratios are usually better suited to higher power lunar, planetary, and binary star observing and high power photography. Medium f/6 to f/10 focal ratios work well with either.
What is eyepiece projection astrophotography?
Steve says: “Eyepiece projection is a method of capturing images through a telescope’s eyepiece using a camera with its lens removed, and is normally used where high magnification is required, for example when imaging planets or features on the Moon.
Do I use an eyepiece for astrophotography?
If your goals are to capture deep-sky astrophotography images, you’ll want to use the prime-focus method that does not use an eyepiece or Barlow lens in front of the camera.
What focal length is best for astrophotography?
16-24mm
Focal Length For landscapes or astrophotography, wide angle lenses that span at least 16-24mm are preferred in order to capture as much of the scene as possible. However, you’ll likely want to avoid ultra wide-angle fisheye lenses that are typically in the 8-10mm range, as these lenses result in distorted images.
How do you increase the focal length of a telescope for astrophotography?
A smaller, more portable SCT might better suit your needs, though, and you can easily increase its focal length using a tele-extender. A tele-extender is an optic that increases the focal length of your telescope, giving you more magnification.
Is f 2.8 good for astrophotography?
Lastly, if you are doing deep-sky astrophotography, you have more leeway. However, wider apertures are still preferable, since they can cut down your exposure times dramatically. Depending upon the sharpness of your lens and the dimness of your subject, use an aperture around f/2.8 to f/5.6.
Should you use a Barlow lens for astrophotography?
For visual use, Barlow lenses from 1.5X to 3X are common. Generally, Barlow lenses of greater than 3X are considered applicable to astrophotography though there is nothing to prevent you from using one with your eyepiece. Barlow lenses come in a variety of designs.
Can I use a Barlow lens for astrophotography?
For visual use, Barlow lenses from 1.5X to 3X are common. Generally, Barlow lenses of greater than 3X are considered applicable to astrophotography though there is nothing to prevent you from using one with your eyepiece.
Eyepiece projection astrophotography. Taking your point and shoot camera (an example is a Canon Powershot SX720) and pointing it into a telescope eyepiece is known as the eyepiece projection astrophotography method.
What is the best focal length for astronomy photography?
The 50mm is a useful focal length for framing up a particular constellation like Orion, above. While the Rokinon 14mm lens is perfect for shooting the Milky Way. Both lenses can produce sharp results and impressive images when the correct settings and techniques are used. The Canon EF 24-105mm F/4 lens has also been useful for certain projects.
What is the best budget lens for astrophotography?
If you were to ask me for advice on “the best budget lens for astrophotography”, I’d lean toward the Rokinon 14mm Ultra Wide Lens if you plan on shooting wide-angle astro-landscapes. Over the summer of 2018, I was able to capture some incredible images of the night sky with this lens.
What is the difference between Prime Focus and eyepiece projection?
Prime focus techniques replace the camera lens with a telescope OTA (no diagonal, no eyepiece), but eyepiece projection adds an eyepiece into the optical path, increasing focal length and magnification considerably. The image below shows the typical eyepiece projection setup.