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violini
member
Reged: 10/03/08
Posts: 61
Loc: Winnipeg, Canada
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I am thinking to up-grade my scope. The purpose of the scope is 70% terrestrial and 30% celestial viewing. I am considering ETX125 and 6SE. Would 6SE be suitable for land viewing?
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Own a poor man's Questar:ETX90 RA
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jgraham
Postmaster
Reged: 12/02/04
Posts: 6749
Loc: Dayton, Ohio
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Most modern MCTs and SCTs are baffled well enough to work well as terrestrial telescopes. The same issue (background light flooding into the eyepiece) used to cause problems with lunar observing with CATs and classical Cass's and Greg's. Sooo, the SE should work pretty well for daylight viewing, though you might get better answers to questions about the SE in the Celestron forum.
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-John
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Homebuilt scopes from 4.25-16.5"
Meade LXD75-N6/SN6/SC8, DSX-90, ETX-60BB, ETX-125PE, DS-2130
Orion StarBlast, BinoViewers, Coronado PST
Rebel XT/XTi, DSI Pro (I, II, & III), DSI, LPI, Electronic Eyepiece, Phillips SPC900NC
Tasco 60mm Refractors
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Arthur Dent
Galactic Hitch-Hiker
Reged: 10/23/08
Posts: 1177
Loc: South Yorkshire, UK
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Hi violini
Yes, should be OK. Bear in mind that you will get an inverted image unless you use an erecting prism in the light path.
You can even connect a camera (via a T-ring & SCT adapter) and have a huge telephoto lens! You can then take photos of garden birds in the next village lol
Art
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If I like it, the wife says that we can't afford it!
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Meade ETX105 (a nice "Grab & Go" scope) & Celestron NexStar 6SE with Bob's Knobs.
Various EP's from 6mm to 26mm, Baader Hyperion 8-24mm Zoom, a 2x Barlow, 2" diagonal and 7Ah PowerTank.
MRF and Antares 8x50 RACI finder scope - both for the 6SE's OTA, whilst the ETX gets a plain RDF.
Canon EOS 400D DSLR (un-modded) and SPC900 webcam. Finally climbing the AP Learning Curve!
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violini
member
Reged: 10/03/08
Posts: 61
Loc: Winnipeg, Canada
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The accessories I already have can be used on the new scope such as Meade 4000 series eyepeices 26, 32, 40mm, UW80 16mm, two brand new 2" 15 and 30mm eyepieces (need a 2" dielectric 90 deg. diagonal), a 45 deg. diagonal.
Celestron 6SE is a faster scope (f/10) and therefore would have a wider field of view. As shown in other thread, starlighter installed a 2" diagonal on his 6SE and used 2" wide angle EP.
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Own a poor man's Questar:ETX90 RA
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rmollise
Post Laureate
Reged: 07/06/07
Posts: 4556
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Quote:
Hi violini
Yes, should be OK. Bear in mind that you will get an inverted image unless you use an erecting prism in the light path.
Art
SCTs with star diagonals...or the ETX produce upright but mirror reversed images.
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Uncle Rod
Rod's New Book:
Choosing and Using a New CAT
Available now!
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jgraham
Postmaster
Reged: 12/02/04
Posts: 6749
Loc: Dayton, Ohio
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That's one thing that took some getting used to when I was using a homebuilt Gregorian; the image was correct up/down and left/right.
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-John
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Homebuilt scopes from 4.25-16.5"
Meade LXD75-N6/SN6/SC8, DSX-90, ETX-60BB, ETX-125PE, DS-2130
Orion StarBlast, BinoViewers, Coronado PST
Rebel XT/XTi, DSI Pro (I, II, & III), DSI, LPI, Electronic Eyepiece, Phillips SPC900NC
Tasco 60mm Refractors
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violini
member
Reged: 10/03/08
Posts: 61
Loc: Winnipeg, Canada
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For land viewing, left/right reversed image is OK (except for reading street sign). Sometimes I screw on the 45 degree diagonal, but it degrades the image. I wonder if there is a 45 deg. prism which will perform as well as a dielectric coated star diagonal.
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Own a poor man's Questar:ETX90 RA
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violini
member
Reged: 10/03/08
Posts: 61
Loc: Winnipeg, Canada
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I build a concrete pier on the observation site at my cottage. When I put the old ETX90RA with 3 table top legs on the pier, it is perfectly polar aligned. Therefore, LS and LNT are redundant to me. If I can find an old ETX125 EC or AT, it will work also with 3 table top legs. But I am still waiting for ETX-LS just because it's an ACF with a parabolic 2ndary mirror. It's optics would be a shade better than the plain SCT. 5 or 6" is the biggest I will go because I have no interest in observational astronomy. I am more interested in black holes (which you cannot see), cosmology, string theory etc.
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Own a poor man's Questar:ETX90 RA
Edited by violini (01/17/09 04:36 PM)
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jgraham
Postmaster
Reged: 12/02/04
Posts: 6749
Loc: Dayton, Ohio
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LNT equipped scopes operate the same as AT scopes if you opt to do a 1- or 2-star alignment instead of the auto-alignment when you power the scope up. The only difference is the LNT module will keep track of the time, and even that you can update yourself. All of the previous Autostar variants are subsets of the LNT command set in the Autostar handbox, so if you prefer the earlier variants they're still there.
It's neat to see the ACF being offered in a 6" scope, that makes for a very nice line of OTAs. Even the LXD75 SC8 now uses the ACF optics.
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-John
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Homebuilt scopes from 4.25-16.5"
Meade LXD75-N6/SN6/SC8, DSX-90, ETX-60BB, ETX-125PE, DS-2130
Orion StarBlast, BinoViewers, Coronado PST
Rebel XT/XTi, DSI Pro (I, II, & III), DSI, LPI, Electronic Eyepiece, Phillips SPC900NC
Tasco 60mm Refractors
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Kubota
newbie
Reged: 10/26/09
Posts: 1
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I currently have a Celestron Nexstar 6se. It is a great scope. Easy to set up. Tracks beautifully and is decently stable. Weighs less than 20lbs all put together so it is very portable. You do need to use a power pack or AC adapter, it will chew up the AA's in no time at all. I am probably going to sell it for a decent price since I have access to a very large telescope.
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