K-Tec

Which Go-To

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19 years 2 months ago #12143 by dave_lillis
Replied by dave_lillis on topic Re: Which Go-To
Thanks for the dose of reality Albert.
you're dead right, if you want to pay thousands for the mount, then you'll get what you pay for.

Dave L. on facebook , See my images in flickr
Chairman. Shannonside Astronomy Club (Limerick)

Carrying around my 20" obsession is going to kill me,
but what a way to go. :)
+ 12"LX200, MK67, Meade2045, 4"refractor

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19 years 2 months ago #12151 by Neill
Replied by Neill on topic Which Go-To
Hey everyone,

Thanks for all the feedback - I agree with you Simon about the new ETX colour - looks really bad. I have only been at astronomy for 3 years really and only joined clubs in the last 2 - my sky knowledge is poor, this is why I am looking for a go-to to see objects beyond the norm like the Moon, Jupiter, Saturn, Orion Nebula etc. Having a Tal as my first scope with its very solid metal stand - portability is a biggie for me this time around - I know the ETX 125 has limited light grasp compared to the LXD 75 6 inch SNT - but it is supposedly easy to set up and use and highly portable.

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19 years 1 month ago #12170 by SimonLogan
Replied by SimonLogan on topic Re: Which Go-To

... I know the ETX 125 has limited light grasp compared to the LXD 75 6 inch SNT - but it is supposedly easy to set up and use and highly portable.


Neill, you're only talking about 5" vs 6" so I can't see it making that much difference.

Simon

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19 years 1 month ago #12171 by albertw
Replied by albertw on topic Re: Which Go-To

... I know the ETX 125 has limited light grasp compared to the LXD 75 6 inch SNT - but it is supposedly easy to set up and use and highly portable.


Neill, you're only talking about 5" vs 6" so I can't see it making that much difference.


ETX125 is a 5" Mak; 138mm diameter with a 39.4mm central obstruction. That gives an area of 14949 - 1218 =13731 mm^2

The 6" SNT 152mm diameter ;54mm central obstruction. Gives an area of 18136 - 2289 = 15847 mm^2. About 15% more light gathering than the 5" ETX.

Cheers,
~Al

Albert White MSc FRAS
Chairperson, International Dark Sky Association - Irish Section
www.darksky.ie/

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