One thing I forgot to mention that could affect image quality is my Barlow lens. It's a Revelation 2.5x Barlow that I've had for years. While it's decent for a budget option, it's not the best. I could also do with an atmospheric dispersion corrector to deal with the lateral colour shift caused by the atmosphere.
Excellent video. However this is just half the story because on DSO - galaxies and nebulas the difference would have been minimal or non-existent. On the Moon and planets the 120 mm F8.3 achromat doesn’t have a chance but on DSO it should be practically on the same level.
I bet that an aperture mask down to 90 mm would make the achromat display a clearly better image on the planets. At 90 mm aperture, 1000 mm focal length and an F-11.1 ratio it would almost have the color correction of an ED / Semi-APO.
To be fair for its price point the Sky Watcher scope does pretty well. I think we are very lucky today to have such a range of equipment, that will do the job, available that will suit virtually every budget. As with any precision made equipment higher quality will always come at a price though.
Thanks for this video. I learned something. I can definitely see a difference even on a video in youtube. I own the ED100 and experience the same aberration. Now I understand why.
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One thing I forgot to mention that could affect image quality is my Barlow lens. It's a Revelation 2.5x Barlow that I've had for years. While it's decent for a budget option, it's not the best. I could also do with an atmospheric dispersion corrector to deal with the lateral colour shift caused by the atmosphere.
A second video with them again each other on DSO would be interesting :)
Excellent video. However this is just half the story because on DSO - galaxies and nebulas the difference would have been minimal or non-existent. On the Moon and planets the 120 mm F8.3 achromat doesn’t have a chance but on DSO it should be practically on the same level.
Those are the best video's, comparing scopes against each other
I bet that an aperture mask down to 90 mm would make the achromat display a clearly better image on the planets. At 90 mm aperture, 1000 mm focal length and an F-11.1 ratio it would almost have the color correction of an ED / Semi-APO.
That would be very interesting to see, if the image quality improves
Excellent video Chris
It was clear from the beginning that the achromat won't have a chance on the planets but how about DSO ?
To be fair for its price point the Sky Watcher scope does pretty well.
I think we are very lucky today to have such a range of equipment, that will do the job, available that will suit virtually every budget. As with any precision made equipment higher quality will always come at a price though.
Nice comparison Chris the extra money makes s lot of difference , but you still get a useable image with the sky watcher
Interesting video and also the constructive comments below. Thanks for doing the comparison.
Nice comparison
Another excellent video
Thanks for this video. I learned something. I can definitely see a difference even on a video in youtube. I own the ED100 and experience the same aberration. Now I understand why.
If possible please also do a similar video on Mars :). In a month from now on it will be possible.
Very interesting video
thank you
Nice video
Does the Stellamira 125 mm show some color / purple on Jupiter ?
Well the achromat is just 399 so that was to be expected
Interesting
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