EdZ
Professor EdZ
Reged: 02/15/02
Posts: 18806
Loc: Cumberland, R I , USA42N71.4W
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That's as I thought.
so Ill repeat here I would not try to push this scope up over 114x. I would stick with simple plossl eyepieces and shoot for magnifications ranging from about 40x to about 100x.
Choices of eyepieces for magnification are somewhat dependant on scope type, quality and aperture. Unless you can state what optical multiplier you will be using in this scope, it's difficult to discuss eyepieces. But I would not push this newt to smaller than a 1mm exit pupil.
A standard binoviewer used in a newt with optical attachment is going to multiply by about 2.5x. Is that how you will use this BV? If so, your 450mmF becomes about 1100F. If that's the case I would suggest maybe a 25mm, 16mm and 12mm plossls. You'll see the rings of Saturn, but you might not see the Cassini division unless conditions are excellent. This scope would not be capable of handling a 5mm eyepiece in the binoviewer. maybe a 10mm max.
edz
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Teach a kid something today. The feeling you'll get is one of life's greatest rewards.
member#21
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b1gred
Enginerd
Reged: 04/01/04
Posts: 16902
Loc: Castle Rock, CO 6677' MSL
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I'll agree with Ed. I don't think I'd even try a 5mm in that scope in "monovision" mode. I rarely go shorter than a 7.5 mono in my 9.25 scope. Which would be about 320x, and conditions have to be about perfect to do that.
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"Dark Skies & Great Viewing"
RandyR / W0RDR
GPS 9.25 XLT/Sky Align /FeatherTouch
TV85 w/FeatherTouch
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DerekDRP
scholastic sledgehammer
Reged: 07/16/07
Posts: 903
Loc: Michigan
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Ok thanks guys I would like to go 90x so that way I can see galaxies mabey? and its also going to be used on a new scope once I get used to this one and learn the planisphere. and all that good stuff.
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EdZ
Professor EdZ
Reged: 02/15/02
Posts: 18806
Loc: Cumberland, R I , USA42N71.4W
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With this scope for galaxies I would go with something about 50x to 60x. I'd even use 40x for very large extended galaxies. I'd use 90x to 100x for bright small planetaries, globulars and maximum on planets.
edz
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Teach a kid something today. The feeling you'll get is one of life's greatest rewards.
member#21
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DerekDRP
scholastic sledgehammer
Reged: 07/16/07
Posts: 903
Loc: Michigan
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Thank you Ed you guys pretty cool. and I have one more question? do thay make a piggy back for my canon rebel xti or better known 400D? for this scope?
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Quote By David H levy
Astronomy is an Art, Not a hobby.
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b1gred
Enginerd
Reged: 04/01/04
Posts: 16902
Loc: Castle Rock, CO 6677' MSL
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If there's a piggyback mount, any camera should fit on it, they almost all use the same bolt. But you "should" ask that question in equipment. This is the "Binoviewer" forum.
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"Dark Skies & Great Viewing"
RandyR / W0RDR
GPS 9.25 XLT/Sky Align /FeatherTouch
TV85 w/FeatherTouch
Edited by RandyR (08/14/07 06:33 PM)
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DerekDRP
scholastic sledgehammer
Reged: 07/16/07
Posts: 903
Loc: Michigan
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Thank you Randy, I will.
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Quote By David H levy
Astronomy is an Art, Not a hobby.
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doctordub
Pooh-Bah
Reged: 01/11/06
Posts: 1402
Loc: New Rochelle, New York
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I was viewing Jupiter tonight with it rather low on the horizan. The seeing was below average but the binoviewer made observing more comfortable and it seemed that I could see more detail in the bad seeing.
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DerekDRP
scholastic sledgehammer
Reged: 07/16/07
Posts: 903
Loc: Michigan
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That's IT I'm getting a bino viewer and maybe x2 17mm eyepeices.
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Quote By David H levy
Astronomy is an Art, Not a hobby.
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b1gred
Enginerd
Reged: 04/01/04
Posts: 16902
Loc: Castle Rock, CO 6677' MSL
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Another one bites the dust....
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"Dark Skies & Great Viewing"
RandyR / W0RDR
GPS 9.25 XLT/Sky Align /FeatherTouch
TV85 w/FeatherTouch
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Larry F
Carpal Tunnel
Reged: 05/24/04
Posts: 2096
Loc: Westchester, NY
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I decided after last Saturday night's club night to not mount the bino for the first part of any public observing session. Many of the newbies and all the kids have a tough time with it. It would be more efficient to wait until they're gone and then use it.
Personally I use it almost 100% of the time except for solar (because the Maxscope helical focuser just doesn't like the weight). I can't possibly look at the moon without it.
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More stuff than I need
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Joe Ogiba
Postmaster
Reged: 02/14/02
Posts: 5446
Loc: NJ USA
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Quote:
I almost never observe without them in my 9.25. I've loved them since day 1.
Same here, 90% of the time I use my C9.25 with the Denk II's.
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DerekDRP
scholastic sledgehammer
Reged: 07/16/07
Posts: 903
Loc: Michigan
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Quote:
I decided after last Saturday night's club night to not mount the bino for the first part of any public observing session. Many of the newbies and all the kids have a tough time with it.
Oh wow I didn't think of that thanks I may have to put a don't touch sign on.
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Quote By David H levy
Astronomy is an Art, Not a hobby.
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b1gred
Enginerd
Reged: 04/01/04
Posts: 16902
Loc: Castle Rock, CO 6677' MSL
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I always let the kids look through it if I can adjust it close enough for them. They LOVE it...
What are they going to hurt if they're under close supervision?
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"Dark Skies & Great Viewing"
RandyR / W0RDR
GPS 9.25 XLT/Sky Align /FeatherTouch
TV85 w/FeatherTouch
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tjswood
Carpal Tunnel
Reged: 05/18/05
Posts: 1881
Loc: Earth
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Good point, its tough enough getting a BV (and bino) at the right interpupillary distance, getting focused for your eyes, etc to imagine some rook walking up and fiddling with it... I agree when public viewing it is probably best to remove - they would probably enjoy the view more if they are actually able to *see* the object! (ever try to look through someone elses binos when their IP distance is way different than yours?) At least when viewing cyclops, you can tell them "just turn this little knob if it looks fuzzy." In fact, that little chore can be tough enough for some that have never looked through a scope before!
Tim
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DerekDRP
scholastic sledgehammer
Reged: 07/16/07
Posts: 903
Loc: Michigan
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you guys have a lot of points here and I really appreciate it.
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Quote By David H levy
Astronomy is an Art, Not a hobby.
Edited by DerekDRP (08/15/07 07:11 PM)
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tjswood
Carpal Tunnel
Reged: 05/18/05
Posts: 1881
Loc: Earth
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Randy,
At some of the public viewing sessions given by the local Astro club, there are literally lines of 10-20 folks at times waiting to take a peek... just couldn't imagine adding to that trying to custom-adjust a BV for everyone after their 15 second "that looks cool" brief peek!
Now, I can see in a more relaxed environ, where there may be a couple of kids, OK... but its a lot of work IMHO at public viewing sessions!
Tim
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b1gred
Enginerd
Reged: 04/01/04
Posts: 16902
Loc: Castle Rock, CO 6677' MSL
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We regularly have 150-300 people at the DAS open houses, sometimes there are a lot of people lined up. Maybe the people here are more patient, maybe some of them move on to other scopes, but the ones who do look through with both eyes and see whatever we're looking at almost universally say, "WOW", and that's worth the wait.
I use the DenkIIs with either the D-21s or my 24Pans so merging is very easy. People almost always make very positive comments about the Binos. I'll keep doing it, because it is so much fun to hear those "Wows"...
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"Dark Skies & Great Viewing"
RandyR / W0RDR
GPS 9.25 XLT/Sky Align /FeatherTouch
TV85 w/FeatherTouch
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tjswood
Carpal Tunnel
Reged: 05/18/05
Posts: 1881
Loc: Earth
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You are a much more patient man than I Gunga Din...
... and I will assert that the WOW's you are getting aren't coming from the BV's, but from the object itself! Seeing M13 *one-eyed* for the first time in the N11 with a 2" Nagler at 125-150x gets the same WOW's too - its the object and not the EP / BV that does it!! As does Saturn or Jupiter. The WOW's don't come as a result of the BV's... most folks eyes are not trained enough to know the subtle differences we amateur astronomers are getting with the BV compared to one eyed viewing (and some even refute that assertion).
... but the bottom line is whatever works. I will say that if you *do* take the time to prep for each viewer, then in the end their experience is that much easier for newbies because they are using both their eyes instead of one... as long as the BV's are set up correctly, centered, IP distance properly set, image merged, focused, etc! I have seen with many first time viewers it takes a couple of peeks to get used to viewing with one eye - so you definitely are making it easier for them...
Cheers,
Tim
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Russell Chase
super member
Reged: 05/09/07
Posts: 103
Loc: Northwest Arkansas
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Quote:
I was viewing Jupiter tonight with it rather low on the horizan. The seeing was below average but the binoviewer made observing more comfortable and it seemed that I could see more detail in the bad seeing.
Ditto, except it was last Friday.
The biggest con for me is weight. I have a Denk II+OCS+filter switch and the added weight with an extra Pan 24 is about 3.5 pounds. I was just in the garage this evening trimming about a pound from my UTA but I still have to add 5-7 pounds to the back end. In spite of this, I'm happy to make any accommodation for the privilege of using my BV.
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