Are Newtonian telescopes good for astrophotography?

Chris Klein, Amateur Astronomy Advisor

By Chris Klein


Are you eager to dive into astrophotography but need to know what kind of telescope to choose? Newtonian telescopes are a great option, offering plenty of advantages that potential astrophotographers should consider.

Take it from an experienced astrophotographer; if you want terrific celestial shots but want something simple and inexpensive, a Newtonian telescope is the way to go. After all, beginners can gain many skills before they break into more advanced equipment like compound scopes. Read on and find out why Newtonian Telescopes are ideally suited for Astrophotography!

In this article, you get

To explore the pros and cons of Newtonian telescopes for astrophotography

To look at different types and suitable optics you need for your telescope

Setting up tips for optimal results

A brief guide to making capturing dreamy astronomical images a breeze

By the end of this article, you’ll have all the info you need to decide if you want to use a Newtonian telescope for astrophotography.

Let’s dive right in.


Are you considering a Newtonian telescope for astrophotography? If so, it’s essential to understand the advantages and disadvantages of this type of telescope.

Newtonians offer great visual and photographic results, making them popular with amateur astronomers.

When choosing a Newtonian, remember that aperture rules over focal length.

If the aperture is big enough and the telescope has a short focal length, it qualifies as a fast Newtonian telescope. Focal lengths are essential when it comes to the field of view.

The longer the focal length, the narrower the field of view will be when you look through your scope.

One thing to keep in mind with a Newtonian telescope is routine collimation is required to get top performance from your scope and maintain image quality while viewing or photographing.

While they have excellent light-gathering power and provide many features that help capture detailed images faster, they may require more setup time than other types of scopes and are slightly heavier due to their size.

Understanding this factor will ensure you make the best decision for your astrophotography adventure!


The Newtonian telescope often referred to as the ‘Newtonian reflector,’ is the oldest variant of a reflecting telescope.

In Sir Isaac Newton’s 1668 design, a concave primary mirror is used along with a flat secondary diagonal mirror to converge an image.

This simple yet effective design has gained immense popularity amongst amateur astronomers for its low price, ease of use, and good performance.

Aperture is another crucial factor when considering whether a Newtonian telescope is suitable for astrophotography.

Aperture refers to the diameter of the primary mirror in the telescope, which allows more light into the telescope allowing you to observe in greater detail.

Large apertures work best with deep-space objects making this type of scope well-suited for astrophotography.


The Newtonian telescope features an open-tube design and short cool-down time compared to refractor telescopes.

The most common type of reflector telescope is a Newtonian, although there are also Gregorian telescopes that use different optics.

Newtonians are one of many options for taking beautiful astrophotography images. Refractors are also suitable since they offer excellent chromatic aberration (CA) correction and imaging quality.

No matter which type of telescope you choose, it’s essential to understand how to choose the best optics for your astronomy needs.

And if you plan on using your telescope for astrophotography, look for a higher focal ratio and long focal lengths, as these will make capturing interesting objects easier.

Now that you know more about Newtonian telescopes and their capabilities when it comes to astrophotography, it’s time to understand how to choose the best optics for your setup!


When selecting your optics, it’s essential to consider the focal ratio.

The f-ratio indicates how much light is collected and how sharp the image will be. A smaller number usually means a faster telescope; this is not ideal for visual observation but can be great for photographing faint objects. However, it’s not an ‘out of the box’ option if you’re interested in using a Newtonian telescope for astrophotography.

Guide scopes help find and track celestial objects accurately with a camera over extended periods, which is necessary when taking pictures of nebulae and galaxies.

These guide scopes range from 30mm-60mm in diameter and come with their mounting plate or rings. They provide accurate tracking when setting up your Newtonian telescope for astrophotography.

Before exploring astrophotography with a Newtonian telescope, ensure you’re familiar with the tools and techniques used to get the best results. One of these tools is a dew heater to prevent condensation on your Newtonian.


If you’re new to astrophotography and want to avoid the extra hassle, short and fast refractors may be the way to go.

Refractors are easier to use and still give fantastic results compared to more complicated telescope setups.

You’ll need to keep your reflector collimated for optimal performance. You can then get good shots of distant galaxies!

When selecting a focal length, it’s essential to choose one specific for astrophotography.

Choose a focal length that will capture high-resolution images without lost detail at various magnifications. A good range for deep-space photography telescope focal lengths is F/4–F/8 with an equatorial mount.

You’ll also need additional equipment, such as a camera auto-guiding system or electronic star tracker, to ensure accurate tracking during long exposures.

There are many choices available when purchasing telescopes perfect for astrophotographic endeavors.

The best focal length that can help you capture great images with your Newtonian telescope depends on your desired magnification settings and performance levels. Be sure you do your research before investing!


Dobsonians, also known as classic Newtonian telescopes, lack an equatorial mount, making taking long exposures of deep-sky objects impossible.

Astrophotography with a Dobsonian brings its challenges. Lightweight optics and single-arm mounts make them susceptible to vibrations, so you’ll have to work hard to get the clearest images.

The second issue when shooting with a Dobsonian telescope is the Alt-Azimuth mount. This type of mount moves side-by-side in two directions (up and down and side-to-side). As a result, it doesn’t track celestial objects along their path, which is required for long-exposure astrophotography.

Fortunately, there are modifications for manufactured Dobsonians that make them suitable for some types of astrophotography. You can add an equatorial mount or motorize the Alt-Azimuth setup.

But whether you want to upgrade your telescope or start from scratch with the proper imaging rig depends on how serious you are about taking photographs of stars and galaxies!


Thank you for reading my article, “Are Newtonian telescopes good for astrophotography?”

Regarding astrophotography, Newtonian telescopes can be an excellent choice for anyone starting! Their affordability, portability, and wide range of available sizes and focal lengths offer aspiring astrophotographers great options to get the perfect setup for their needs. Newtonians may even be used for terrestrial viewing.

Just make sure to choose the best optics and maintain your telescope correctly. Soon enough, you could easily take snaps of galaxies and star clusters.

About the Author

Chris Klein, Amateur Astronomy Advisor

Chris Klein is an amateur astronomy advisor, astrophotographer, and entrepreneur. Go here to read his incredible story "From $50,000 in Debt to Award-Winning Photographer Living in Switzerland". If you want to send Chris a quick message, then visit his contact page here.