The right size and with most the useful bundled accessories
Revisão de D. R.
em 18.05.2021 22:43:24
( 5 / 5 )
Before buying the Omegon Prodob 254/1250 I took several months researching about different telescope types and mounts. Being a beginner and having a limited budget there were no doubts that a reflector telescope in a dobsonian mount was the way to go. Then I compared the specifications within this type and the Prodob clearly won. By that time, I couldn’t find many reviews about this specific model, but I felt confidence on the brand and finally decided that this was the model to buy. I could not be more satisfied with the telescope. Having already 6-inch dobsonian from a competitor (SW 150P), I could easily compare the differences in building construction and light gathering capabilities of each models. Prodob absolutely wins in all aspects.
Size: My aim was to have the largest mirror diameter without having a longer tube. The 10 inch is the perfection as it fits on my compact vehicle and moving around the tube is not awkward.
Weight: As I am not a tall person the weight of this telescope is the exact limit to carry without any hassle. I had no doubt in choosing the 10-inch size as I already knew the weight of a mount (being close to the SW one) and was a matter of carrying 2X 15kg pieces instead of just one.
Design: Omegon deserves an honourable mention as the chosen colors (black & dark red) match perfectly making it very elegant.
Mount: Very easy first-time set-up. Assembling the tube into the mount is also easy although some “accuracy” is needed to position the tube into the slot (OTA weights aprox. 15 kg). The Lazy Susan rotating system is really an improvement compared to Teflon making possible a one finger very smooth rotation. The needle system makes some slight noise when rotating but who cares? It is excellent. Friction adjustment (rotation) works fine. Locking the tube to avoid oscillation works okay too. Very easy to track objects.
Mirrors: The size matters. I still have not tried on emission/reflecting/planetary nebulas and galaxies (dark skies are needed) and planets due to their current position but concerning globular clusters, open clusters, moon, binary stars separation), the light gathering and resolving power difference is huge.
Coma: This was an aspect that I was very concerned as I was changing from a F/8 to a F/4.92 scope. To be honest for visual & with well corrected eyepieces I don’t feel any urgent need for a coma corrector. The coma is there but it does not affect the viewing experience as this aberration is only seen in the outer regions of the FOV being the rest pinpoint stars. For a total pinpoint FOV a coma corrector should solve it.
Accessories: although we should not evaluate a telescope by its accessories the Prodob has the most useful ones: no average quality eyepieces but a good Omegon SWA 70º 32mm 2’ eyepiece providing an exit pupil of 6.5mm. This high-quality eyepiece is excellent for viewing large objects in dark skies and for using it as a finder. By talking in finders, the Radiant is the finder to have (Radiant version). I feel no need of any other. The cooling fan is also very useful to accelerate the cool down (mandatory procedure). Another gem of the accessory set is the dual speed Crayford focuser. It is a huge step up when compared to a single speed sloppy rack and pinion focuser. With the 1:10 reduction I can always reach the exact focusing point in a very smooth way. The included collimation knobs in primary mirror are also very useful for a tool free collimation.
Assistance: This is one of the most important factors to me. The assistance that Astroshop provides is outstanding. In my case João M. (astroshop.pt) has been giving me all the necessary support and recommendations. Thank you for your patience. A beginner has so many doubts that a truly supporting customer care is highly valued.
Overall: 10/10. Two thumbs up!
*Suggestions for a Prodob 2.0 version: Although none of them are serious flaws it would excellent if the dust/dew cap had a 50mm limited aperture opening with a lid. It would be useful to install solar filters and reduce glare in the moon. A moon filter or a higher magnification solves the latter. Also, a guiding knob at the end of tube would be convenient to have (easily solvable by replacing one of its screws by some cheap or cost-free guiding knob). A third recommendation would be collimating knobs on the secondary mirror to make collimation a totally tool free operation. Also easily solved with 3X M4 30mm (dark red) knobs making the telescope even more beautiful.