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8.25 lbs or 3.75 kg advice

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#1 bearpig

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Posted 26 October 2021 - 08:28 PM

So, newbie at scope buying (and astronomy). 

 

I'm using an 18-200 Nikkor lens on a d5100 with a Sky Adventurer on a Manfrotto rated for 38 lbs.  The SA has a max design load limit at 11 lbs.

 

I'm having fun. 

 

Next quarter I will be shopping for a refractor BUT I am not willing to buy the top end mount to replace what I am doing. I will use the scope for a little optical but mostly imaging.

 

Next fall is serious mount buying if I stick with this for a year.

 

At present I am using field glasses and "learning my trade" but I'd like to resolve the images associated with the constellations I am learning. I really had no idea so many stunning objects were available with less than tens of thousands of dollars in gear.

 

My issue? Mass but for ease I'll call it weight.

 

I want to stay under 8.25 lbs for the OTA and any flattener/reducer required.

 

I cannot be the first to face this dilemma but ... I can't seem to find a thread that frames it in these - newbie - terms. 

 

I see the W. O. GT 71.

I see the Orion 80ED t carbon fiber ( not a fan of cf generally )

 

Obviously I am trying for the best - and largest - APO doublet I can find for the weight. Triplets are awesome but glass is heavy which I probably don't need to say; but, there it is.

 

Anyone with experience in solving this design constraint? I would be welcome for the suggestion and the oversight as I am sure I am missing something obvious.

 

Thanks ... the new guy.



#2 bearpig

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Posted 26 October 2021 - 08:59 PM

Turns out, Google Shopping filters refractors by weight range!



#3 jupiter122

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Posted 26 October 2021 - 09:05 PM

TV 85 OTA IS 6.1 lbs.
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#4 sevenofnine

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Posted 26 October 2021 - 11:31 PM

Welcome to C/N! welcome.gif

A very experienced astrophotographer on this forum recommends "The Deep-Sky Imaging Primer (2nd ed) by Charles Bracken. He will answer most of your astrophotography equipment and technique questions. Best of luck to you! hmm.gif

 

p.s. Check out the Astro-Tech scopes from our sponsor. This one gets great reviews from imagers:https://www.astronom...fpl-53-f-6.html. Only 4+lbs.  wink.gif


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#5 bearpig

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Posted 27 October 2021 - 07:47 AM

Thanks ...

 

Ordering the book now!




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