Telescopes are a very useful tool for astronomers to observe objects that are too far away out of the earth’s atmosphere to properly see with naked eyes. Their mechanism helps anyone to see further from what the eyes are capable of but, it is also important to choose the best tools because not all telescopes are made equally reliable such as Meade LX90 Vs Celestron Evolution. The two are reliable and capable of delivering clear images but, let’s see the specific here before deciding the option.
In this comparison, we are going to talk about:
- What are Telescope’s Sensitivity and Resolution
- What are Meade LX90 and Celestron Evolution
- How are the Design of Meade LX90 and Celestron Evolution
- How are the Optical Tube of Meade LX90 and Celestron Evolution
- How are the Mount of Meade LX90 and Celestron Evolution
- How are the Performance of Meade LX90 and Celestron Evolution
- Meade LX90 Vs Celestron Evolution
- 1 Sensitivity and Resolution of Telescope
- 2 About Meade LX90 and Celestron Evolution
- 3 Meade LX90 and Celestron Evolution Design
- 4 Meade LX90 and Celestron Evolution Optical Tube
- 5 Meade LX90 and Celestron Evolution Mounting
- 6 Meade LX90 and Celestron Evolution Performance
- 7 Meade LX90 vs Celestron Evolution
- 8 Conclusion
Sensitivity and Resolution of Telescope
As a regular human being, our eyes are very limited. This vision organ is impressive and thanks to them we can learn a lot of things just by observing them since through these eyes information is captured for the brain to process. But, as good and as healthy our eyes can be, still we can’t see the crater of moons and the satellites of Jupiter. This is why the invention of the telescope is crucial for human’s knowledge and technology. Basically, a telescope is a tool to aid our vision.
Contrary to popular belief, a telescope is not magnifying light despite how those further objects are imagined on the optics but is a tool to gather light. The purpose of this instrument is for imaging or in which the picture of celestial objects are resolved and for photometry where the radiation coming from the objects is measured for brightness or split to obtain a spectrum. Spectrum itself is taken to help astronomers identify what type of object it is as well as determining the characteristics of said objects.
For most people, the telescope is meant as an imaging tool whether it is for observation or for documentation such as with astrophotography. Since we are talking about imaging, image quality will come forward to decide the capabilities of the telescope and in the instrument, there are actually terms like sensitivity and resolution which refer to how well they can deliver the image to your eyes. These overall will affect the performance and experience of their users while observing celestial objects.
Sensitivity is a measuring of the minimum signal the telescope can distinguish in front of background noise. In a perfect condition, this is decided by the size of their primary mirror or lens so the larger the diameter, the more sensitive the telescope. The more sensitive the telescope, the more light it can gather from faint objects and it also means more distant objects can be studied photometrically or imaged. Side by side, you will see plenty of smaller details with high sensitivity telescopes what the lower one ignores.
Next is the resolution which is what makes you able to separate objects into their own so if there are two objects, they will appear as two and not one. The resolving power or resolution is the smallest angle between close objects that can be seen clearly as separate things and this is limited by the wave nature of light. Related to the aperture or diameter of their mirror/lens, the larger the aperture also the greater the resolving power will be.
|Meade LX90||Celestron Evolution|
|Product Dimensions||14 x 47 x 21 inches||28.5 x 35 x 15 inches
|Shipping Weight||47 pounds||36 pounds
|Best offer||Check price||Check price|
About Meade LX90 and Celestron Evolution
Telescopes are pretty common hobbyist equipment and they are also widely available including for beginners or for younger users. Depending on what you are aiming for and what the telescope is used for such as whether for observation or for astro imaging, the type and mounting can vary. Computerized mounting such as those used for Celestron CPC Vs CGEM are more convenient and hassle-free for automatic tracking and even an easier way to align the star since everything will almost fully automatically done by the system.
If this is your first instrument or if you have no favorite brand yet, it is quick to shop based on the manufacturer because you can get reliable options faster without having to check every brand in the market. As for with almost any commercially manufactured products, telescopes are available from plenty of brands such as from Meade and Celestron. The two are well known names for their high quality instruments but usually Celestron are more affordable in comparison.
For astronomers or enthusiasts who are aiming to get the best image from their setup but still through a convenient system, the Meade LX90 and Celestron Evolution line are two impressive families from these famous brands that are known to always offer good quality telescopes. They also carry varying sizes or apertures based on your budget or preference such as between 8, 10, and 12 inches of LX90 while Evolution or NexStar Evolution from 6, 8, and 9.25 inches.
Both of them are boasting a reliable OTA assembly with high-quality optics and the tube is coming in a set with the mounting as well for a complete system. The LX90 is boasting the ACF design which means it is made to reduce the coma effect. The OTA of Evolution or NexStar Evolution is available in two variants, one is the standard SCT and the other is their EdgeHD. If you have the budget, we do recommend opting for the latter to achieve better imaging.
Meade LX90 and Celestron Evolution Design
As an SCT model, the Meade LX90 and Celestron Evolution are very compact or short in length. The tube or OTA itself seems to be made of certain types of metal probably aluminum and native to these brands, they do have different fashion. The two come with their own mount or an alt-azimuth type of mount which both are computerized and ready to use. The tripod is also included for your purchase making the two suitable for personal use or for a present.
With the tube there is finder scope to find your star on both OTA but if you choose the standard Evolution with SCT tube, this variant only has a standard red dot finder scope instead of StarPointer Pro. Regardless the size you choose, their focal ratio will be the same which is at f/10 for all OTAs in these collection. Besides the main setup, you will get 2 eyepieces (40 and 13mm) with Evolution and 1 (26mm plossl) with LX90.
Meade LX90 and Celestron Evolution Optical Tube
Moving further, let’s see what Meade LX90 and Celestron Evolution can offer starting from the OTA because this is the most important part. Starting with LX90, this series is using the ACF assembly or Advanced Coma Free. Coma is the optical aberration which distorts objects on off-axis as they are away from the center of the field of view and located further to the outer side of the telescope mirror/lens. This is why objects in the outer area often seem blurry or less clear.
ACF is using a full aperture aspheric corrector lens located directly behind the hyperbolic secondary mirror and the spherical mirror so the mechanism is different from RC design. The ACF also uses an oversized primary mirror to help bring more off-axis objects into the telescope view. If you choose the Evolution with EdgeHD, the technology is very similar to ACF as well. The OTA has a special corrector inside the optical tube, developing a special aplanatic optical scheme that combines CDK and SCT designs.
Now EdgeHD OTA has different mechanical improvements over the original Evolution OTA including the internal baffles and better design for a more illuminated field. The primary mirror is also supporting locking knobs to minimize mirror shift while ventilation ports are layered with filters to prevent acclimatization time by avoiding the dust entering the tube.
Meade LX90 and Celestron Evolution Mounting
Now for the mounting system, this is also the part that we love from Meade LX90 and Celestron Evolution because the two are already computerized. For ease of use we do think it is only about whether you are familiar with their system or not but in general GPS aligning systems are very much the same across manufacturers. For these mounting, you can choose from several methods of alignment but usually we will just go with the 2-star alignment. But, before starting with alignment, don’t forget to align the red dot finder first.
Meade LX90 and Celestron Evolution Performance
Lastly is about the performance and both Meade LX90 and Celestron Evolution are really good. The EdgeHD and LX90 ACF OTA are amazing in delivering clear imaging even for objects located off-axis so the tube itself is ideal for astrophotography as well if you change the mounting into EQ mount. The computerized go-to mount of these telescopes are also reliable and pretty quiet when tracking but can be a bit noisy as they slew. For first time users, aligning the telescope can be a bit confusing but the manual will be very helpful.
Meade LX90 vs Celestron Evolution
Both of them are good choices for almost any type of user, probably except for an astrophotographer since if so then we have to add accessories or use a different mount but for observing, these setups are working great. The best thing is their OTA which is significantly better than the more common lines from both manufacturers. If you get the EdgeHD from Evolution setup, the image quality will be on par but the original Evolution still uses the more traditional optical tube design with inferior quality.
You can go amazing with any of the two based on which seems to fit your application better but if you can spend more, we recommend the EdgeHD variant from Evolution series because it has a great image quality, similar to LX90 but with a more affordable price tag.