Ravi Hegde

What are the authentic weblinks for the Messier Objects' Catalogue?

5 hours ago, wimvb said:

That would make it equivalent to a star adventurer or similar star tracker. So yes, it's a viable budget solution. You won't have goto capabilities, and you need to make sure you have good polar alignment for astrophotography.

Thanks

To accomplish budget friendly tracking mount, is it practically workable when an EQ3 mount is attached with RA motor?

1 hour ago, Gonariu said:

A 120/1000 has a cromatic residue which it isn't negligible, a 100/1000 has less CA than this.

In 102/1000mm refractor, how sever the CA will be?

13 minutes ago, Ratlet said:

I started observing last year with a 130mm reflector (a 130pds which is F5).  I bought a cheap laser collimator (ie the Amazon specials), collimated it with a jig made out of Lego and haven't looked back, except to buy an even bigger 250mm reflector on a dobsonian mount.

I can't comment on which would be better, but I didn't find collimation a hassle to learn and I've not found it a hassle to maintain, honestly I hardly ever touch it.

Thanks. How is the performance of the 130mm reflector for DSO visual astronomy?

3 hours ago, bosun21 said:

Walking on eggshells here 😂. As @ollypenrice has stated the reflector if collimated properly will provide better views especially on brighter targets like the moon and planets due to not suffering from chromatic aberration. If the refractor were an ED(extra low dispersion) or a triplet then it would be better than the reflector. The larger aperture of 130mm will not be so much of a gain due to its central obstruction causing loss of contrast. For some people the chromatic aberration doesn’t seem to be a problem while for others, myself included it’s off putting. If you can cope with the collimation aspects of the reflector then I would go for that, if not then get the refractor. Good luck with whatever you choose.

One of the compact refractor with Extra Low Dispersion lens I am thinking is the following:

https://www.bresser.de/en/Astronomy/Telescopes/BRESSER-Messier-AR-102xs-460-Hexafoc-Optical-Tube.html?mtm_campaign=Doofinder&mtm_kwd=4802460&mtm_source=English&mtm_medium=OnSite&mtm_cid=GreatBritain&mtm_group=SiteSearch

For visual astronomy, which scope performs better? 130mm reflector or 102mm refractor? Comparison between the following two is welcome:

Reflector:
https://www.moderntelescopes.net/product-page/explore-scientific-130-600-eq-3-reflector-telescope

Refractor:
https://www.bresser.de/en/Astronomy/Telescopes/BRESSER-First-Light-AR-102-1000.html