Levenhuk Blitz 114 BASE reflector telescope problem

[pashikk2008]

Good afternoon.
Please tell me about the situation with the Levenhuk Blitz 114 BASE reflector telescope. 
It is adjusted with a Cheshire eyepiece. However, when viewed, the objects are blurry and fuzzy, as if there is not enough sharpness. 
Defect or feature of the model?
There are two attached photos: photo of the Moon and Venus through a 2x Barlow lens on a Canon 550D.
Photo in full auto mode.
The focuser is fully extended.
Exposure 1 \ 60 - it's not about the "shake".

 

[michael.h.f.wilkinson]

With a Barlow, you have an 1800 mm focal length. That means the slightest shake can cause blurring, even at 1/60s. Focus might also be off. If your focuser is fully extended, this might mean you need an extension tube to reach focus. Venus clearly shows signs of chromatic aberration, which can come from the Barlow, or possibly atmospheric refraction. Furthermore, I see that this scope comes equipped with eyepieces down to 4mm, which with a 2x Barlow gives an effective 2mm focal length. However, an F/8 telescope like this works better at 8mm or perhaps a bit shorter. Pushing to far larger magnifications does not yield more detail, it just smears out such detail as there is over a larger area. Finally, turbulence in the telescope tube if it hasn't  cooled down (or warmed up) to the ambient temperature, or turbulence in the atmosphere can cause severe blur as well. If there are large differences in day time and night time temperatures, this can be a severe problem, especially for objects low in the sky, and at dusk or early in the evening. Just my tuppence

[Louis D]

That scope package has several optical knocks against it right out of the box.

• First, it uses a spherical mirror, so it will always have some level of spherical aberration leading to blurring of details.  Admittedly, at f/8, it's not as bad as at say at f/4 as with the Celestron FirstScope 76, but it is still there to some degree.
• Second, the three eyepieces are of ancient designs (Ramsden and Huygens) more suitable to f/12 or slower scopes.  While they will work at f/8, they will only be sharpest on axis.  I would primary use the H20 and H12.5 without the Barlow lens to learn your way around the sky.  See if those two produce sharper, more pleasing images with a cellphone camera held up to the eye lens (afocal projection).
• Third, the Barlows packaged with these scopes tend to be of dubious quality.  Many are singlets instead of doublets, so they introduce a lot of optical issues themselves.  A good Barlow will simply magnify the center of the image without degrading the image.  It may magnify the shortcomings of the scope's image not visible at lower magnifications, though.

The moon is a very good target to experiment on while learning what works well with a scope and what does not.