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PostPosted: Sun Nov 20, 2016 12:06 pm 
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Joined: Fri Aug 09, 2013 6:17 am
Posts: 1
Hi All,

I was just wondering if this is normal when I setup the scope in the daytime and focus on something about 3 miles away I only have 4mm of back focus, i have mainly noticed this since fitting my new 2" diagonal. Will this be the same at night or maybe even worse?

Thanks

Rob


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PostPosted: Mon Nov 21, 2016 10:58 am 
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Joined: Mon Jan 09, 2006 11:05 am
Posts: 5275
Location: Lancashire
Focusing on objects three miles away Rob means that your 'scope is focused at infinity, so anything in the nightsky would be also focused. What magnifications are you using?
The MEADE 5000 102 ED/f.7 doesn't seem to get very good reviews. Some people who have used it prefer the TAL 102/f.10 achromat.

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brian


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PostPosted: Tue Dec 20, 2016 12:34 pm 
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Joined: Sun May 11, 2008 6:11 pm
Posts: 3260
Location: Portslade, Sussex Lat 50deg 51min Long 0deg 13mins West
Although about a different telescope, perhaps a similar "problem" here. Recently I bought a Acuter DS65 spotting scope, which comes with a zoom eyepiece, but will accept the normal 32mm eyepieces. Bought a number of Plossls, all were ok but the Barlow (x2), although working well when used on nearby views of birds and rooftops etc it would not quite reach focus at infinity, except for one eyepiece, the 40mm. This however was usable throughout and did enable some good hand-led camera shots of the Moon. regards maf


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