Celestron C8 Vs EdgeHD

When it comes to telescopes sometimes we have to spend more to get reliable equipment but it is not always the case since Celestron have plenty of the affordable models without having to ask so much from your pocket. For those who want a telescope for either photography or observation, the Celestron C8 Vs EdgeHD are two ideal models to consider. The two are praised for their performance yet, let’s see which of them will be the better choice below.

In this article, we are going to give you information about:

  • Which Telescope for Astrophotography
  • What are Celestron C8 and EdgeHD
  • How are the Design of Celestron C8 and EdgeHD
  • How are the Mechanism Difference in Celestron C8 and EdgeHD
  • How are the Performance of Celestron C8 and EdgeHD
  • Celestron C8 Vs EdgeHD

Telescope for Astrophotography

Different people may have their own hobby and for some of us it is about looking at what’s out there, literally out there outside our home planet. It is a mesmerizing sight to behold since most of us are probably not going to be there when the technology is able to let humans travel casually into other neighboring planets or galaxies. They look mysterious but beautiful at the same time which attracts a lot of eyes admiring the colors and shape.

However, since our eyes are very limited in terms of capabilities to see an object further away, it is required to use tools in order to aid the vision. We usually wear glasses to read properly or use scope to see something in a distance just like when hunting. For celestial objects, we will need a scope as well or telescope. It is the same to a regular scope but is often larger or longer to cover the distance and provide enough power.

In modern day getting into astronomy is easier than ever because you can find tons of options out there when it comes to choosing the best telescopes that can bring the best experience as well. The confusing part is not all of us will be using them in the same manner and at the same place or even type of objects to observe. Among those there are people who love capturing still images of those sky objects and bringing them to a wider audience or for a personal collection.

There are plenty to choose from when it comes to deciding which telescope to buy and for an astrophotographer, the focal length is probably the most important. Focal length is the distance from the first lens to the focus point of the camera such as 1000 mm or 40 inches internally inside the scope and used to determine the magnification it can provide. This alone can help decide what astro-imagining we want to capture or what object to capture through the telescope.

 Celestron C8Celestron EdgeHD
Product Dimensions15.1 x 23 x 13.4 inches15.1 x 15.1 x 25 inches
Shipping Weight19.8 pounds22 pounds
Best offerCheck priceCheck price

The example is a wide-field astrophotography setup which usually at or below 70mm focal length will be ideal because if it is longer then we may have difficulties to fit objects at the same frame. Another related specs is focal ratio written as f/number. The lower the number the faster this telescope gathers light efficiently. This f-number is determined by both focal length and aperture in which the latter is the diameter of the light collecting region of the telescope so naturally the wider it is the better it can gather light faster.

About Celestron C8 and EdgeHD

If you are here then it means you are also currently looking for a new telescope that will be ideal for astro-imaging. There are actually so many of this type in the market and they can be versatile as well just like regular scopes. One of the most popular choices is SCT or Schmidt-Cassegrain because while this is probably not the most ideal of best for a quick astrophotography, this model is very affordable since being mass produced and fairly light as well to be easily transported.

SCT models offered by numerous brands out there and the low price point makes it a great start for any enthusiast who just gets into the hobby. Among many of them, Celestron is one of the most popular options to consider. This brand is very famous as the go-to of many astronomers and hobbyists who plan to shop on a budget because chances are they always have the product for you. Quality wise they are also very reliable and well made, usually with all accessories needed.

For astro-imaging, there are various models you can count on to from the catalog but among the most versatile and affordable are probably the Celestron C8 and EdgeHD. Both are available at the 8-inches size and often being the choice for photographers who are relying on long exposure. The two are also classic models especially the C8 as this variant has been around for quite some time hence it is also familiar with people from different generations since its production in the 70s.

In comparison both Celestron C8 and EdgeHD are very similar to each other and they are capable of giving a wide range of versatility for almost any user while also based on the same design. But, being the higher end choice, EdgeHD is also coming or newly designed which makes the SCT model even more reliable on the performance. Not to say that C8 stays the same over decades but the latter is definitely improved on the mechanism to diminish some common issues and improve usability.

Celestron C8 and EdgeHD Design

The two are available as the scope itself or OTA only so you can mount them on the suitable mount such as either CG-5 or using the CGE mount from Celestron, depending on which model you are opting for. For example the model we use today is C8 with a Vixen style saddle while the EdgeHD model is in Losmandy D series plate. Similar to most scopes out there these two tubes are made of aluminum and weight wise, not heavy at all at 12.5 and 14 lbs. respectively.

Side by side they are the same size as well or measured at 17 inches long and have a diameter of 9.3 inches. Both are also paired with one eyepiece in the box but have different sizes as the EdgeHD comes with a 40mm 51x magnification and the C8 has a 25mm 81x magnification eyepiece. Read also: Celestron Edge HD 8 Vs 9.25 here.

Celestron C8 and EdgeHD Mechanism 

Moving further, let’s see what Celestron C8 and EdgeHD can offer and as you can guess, an SCT model means both are catadioptric with 3 element design of a Schmidt corrector plate at the front, a spherical primary mirror, and a slightly aspheric hand-figured second mirror. Similar to most SCT from Celestron, they use a moving-mirror focusing system with the main sliding back and forth on a threaded rod. As it sounds, it is prone to causing problems or image shift.

Image shift happens when the main mirror flops around as it is focusing and this is prominent during long exposure which ruins the result. The original C8 to the newest one is still suffering from the same issue and this is what EdgeHD is trying to solve. This is because the scope line is redesigned with a special corrector inside the optical tube so they are combining CDK advantage into an SCT model. Due to the additional mechanical improvements the EdgeHD is a higher end choice.

The prominent difference that makes the latter a better choice are the new internal baffles and new design to optimize the illuminated field with a new main or primary mirror which is also supported by locking knobs to prevent the same issue like in C8 models. It is also featured with ventilation ports with filters in order to reduce mirror acclimatization time due to the dust and small particles entering the tube.

Celestron C8 and EdgeHD Performance 

Moving further on the performance side, Celestron C8 and EdgeHD are similarly easy to use for those who already have experience with SCT while doing their astro-imagining as well but SCT is naturally not the best choice for beginners due to the image shift and mirror flop so they in general will require more patience to work with, besides the long focal ratio. This thankfully is not what you will experience with EdgeHD because Celestron have redesigned this SCT to be more reliable and not only for astrophotography, it is also ideal for observing.

The prominent difference is about the sharpness of the image itself because with various small corrector lenses mounted in the baffle tube, this variant is going to give you a better clarity and better image. Overall in terms of usage the two are ideal for lunar and planetary photography as well as deep-sky long exposure with the latter being more reliable and easy to get used to, even for beginners.

Celestron C8 Vs EdgeHD

Both Celestron C8 and EdgeHD are good options for enthusiasts and hobbyists including astrophotographers. The difference is EdgeHD will be the newer SCT line from Celestron hence more expensive and more reliable but what makes it better is the redesigning aspects in which it can eliminate the common image shift issue on the original scope. This makes the performance and image captured look better as well as easier to work with especially with long exposure deep sky-imaging.

- the most beautiful double, triple and quadruple stars
- variable star
- solar systems
- objects and asterisms Double line, 16-character Liquid Crystal Display Hand Control with 19 fiber optic backlit LED buttons
- 8" EdgeHD Optical Tube Assembly
- Aluminum Optical Tube
- Celestron's premium StarBright XLT coatings
- 2032 mm focal length (f/10)


You can go with any of them based on which sound more suitable for the application or budget range but if you have no issue regarding the price point then we highly recommend getting the Celestron EdgeHD because it will deliver a better performance and experience due to its redesigned mechanism.

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