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Topics - skelevchasul

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So, this is a continuation from a topic that I posted about this refractor, the Explore Scientific ED102 APO. My one issue is that I need a good mount, I had decided on the Vixen Porta 2 but everyone else said that it would not work with this scope of around 13lbs with everything on it. My other options were the Orion VersaGo, and the... that was really my only other idea, I'd like to get a nice Alt/Az mount around $200 or so dollars and is should be able to carry at least 15lbs of weight. I have really only seen the VersaGo as a good option but I know I'm still cutting myself short so I would like your advice. Anyway, I would really appreciatesome advice and would love some suggestions for a good mount, I thank you for the help and look forward to learning more about the mount I will get.

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Just like the topic says. I am not sure how these work. And because I am not sure how these work, I don't know if it is possible to get a universal focal reducer for a telescope with a 2" focusser. Can someone help?

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ATM, Optics and DIY Forum / lyot test question
« on: January 03, 2018, 11:35:42 PM »
Today I try lyot test with a glass plate and candle ash,please see the picture(I straighten the ash after take picture) .
But foucault tester camera failed to get images, when cutting light with the lyot plate , just total black. With eyes, mirror is very dim.
I think ash is too thick and try diffrent thickness, but no successful result. Either total black or very dim mirror.

My foucault test use a led, it is very bright when foucault testing.

Please help, thanks a lot!

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This is for those who are always left out of the show me threads.  Any entries?

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General Astronomy & Observing / Someone was busy this morning
« on: January 02, 2018, 11:32:25 PM »
Never have seen so much spam in a forum on CN. I'm sure a moderator will come be and clean it up and this thread will make no sense.

Maybe it was the Easter Bunny?

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Eyepieces Questions & Recommendations / Masuyama 32/85 -- First Impressions
« on: December 30, 2017, 09:45:36 PM »
Mine came in today and I grabbed it from the mailbox as I was headed for our dark sky site. Now my Nagler 31 has been my gold standard for great wide field views so I had that with me for comparison. I used my 140 NA f5.7 petzval and a friends 16" f4.5 Teeter. Transparency was a 6, seeing 5-6ish.

The first thing I checked was afov, comparatively. The Masu was a smidgeon wider than the 31N. I started looking for seagulls. I have mild astigmatism as does my friend but except where M13 crossed the field stop there didn't seem to be any issues as we moved star fields and globs across the view. I then looked at the Veil and Californiawith both ep's. Same-same. I think the maker of theMasuyama has a winner.

The Masu eyepiece is significantly lighter than the Nag so balancing between 2" eyepiece changes isn't the octopus act it can be when pulling out the Terminagler. I like this and I'll get some use in this fall.

Jim

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Reflectors Telescopes Forum / New Moon Telescope 8" Hybrid
« on: December 30, 2017, 08:32:42 AM »
I picked up my new baby yesterday and I'm just blown away by how beautiful this scope is in person.  These photos don't really do it justice. All of the corners and edges are nicely rounded so they are almost soft to the touch.

A little back story and then some specs:  I had purchased the mirror (Edmunds 8 inch F5), 1800 Destiny curved spider, Moonlite 2 speed focuser and University Optics mirror cell in preparation for building a scope myself.  I also bought the metal side bearings and truss parts from Ryan at New Moon Telescopes. Unfortunately, we had a tragedy in the family that was going to delay the build for quite a while. I asked Ryan if he could build it for me. So I sent all the parts to him and below is his creation.

Specs:  The entire scope including ground board weighs about 40 lbs.  The base is about 8 pounds and the mirror box, truss and upper rings with finder is about 32 lbs.  My mirror is an older, normal thickness for the day, Edmunds mirror.  I think it's about an inch and a half thick, maybe and inch and a quarter, I forget.  The University Optics mirror cell is not really ultra light weight either.  Needless to say, a modern thin mirror would shed some weight off these totals. I can easily pick up the fully assembled scope (base and OTA) and take it out side.

And finally here's some pics:

Attached Thumbnails






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Mounts Questions & Expirience / What GEM would you buy for 50lbs visual?
« on: December 28, 2017, 11:09:15 PM »
I have been offered a deal on a LX200 12" OTA from around 2000. The seller says that the weight, with rings, comes in around 50lbs. That means I need a new mount because my AVX won't carry that much weight. I actually really like the AVX and the GOTOs have been dead-nuts accurate right out of the box. I looked at Celestron's GEM lineup and saw the CGX has the payload capacity I'd need. However, reading about the CGX here on CN has scared me off.

-Purely for visual use
-Portable use only, so lightness is a HUGE advantage
-GOTO required, AVX-level GOTO performance desired (consistently puts objects almost dead center in 18' field)
-Price as low as possible but not lower. I don't want a cheap crap mount that barely works but I don't want to pay for an imaging-class mount either because I don't image.

What do you guys think?

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Reflectors Telescopes Forum / Advice on european mirror makers
« on: December 28, 2017, 10:03:09 PM »
I'm looking for a good mirror set to improve my dobson. It could be from 14" to 18", focal between 4 and 5. Nowadays I have a chinese set made of BK7. Having a pretty good apo, I don't look for excellent planetary views, but I would like to have better stars when magnification goes high. Depending on seeing and termal stabilization, with my mirror beyond 150 - 180X the stars beguin to "get fat". I think that 1/8 wave could be fine, or even 1/6. What do you think? I guess that contrast would also improve, making DSO more apparent to the eye.

Living in Europe, unfortunately USA makers are not an option, due to transport rates and customs.
What are the best options in Europe? There are expensive ones, like Huygens, Alluna or Mirrosphere, but with little feedback, and the UK ones seems to have a variability in quality control that have increased in recent years, making them worrisome (source: various fora  )

Thanks.

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Beginners Forum / SCT versus Newtonian
« on: December 28, 2017, 03:58:58 AM »
I own an 8 inch Dobsonian telescope and want to buy a new telescope. I've been reading about the different types and have the following question: would I be able to see anything with an 8 inch Schmidt-Cassegrain telescope that I can't currently see with my 8 inch reflector or is there no difference in that regard?

I want a telescope that allows me to see deep sky objects better than my current setup. Would a same aperture SCT fit that need? Or do I need to go bigger regardless of telescope type?

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Eyepieces Questions & Recommendations / 11 mm TeleVue Plössl - any good?
« on: December 24, 2017, 06:11:38 PM »
I am looking for a good medium power eyepiece for detecting greater detail about the planets, moon and heavy sky (particularly PN).  My 10mm is fine about the Moon and planets, but doesn't work all that well on items like galaxies.  Additionally, it is filled with fingerprints.  That is why I search to substitute it.

Is the 11mm TeleVue Plossl a good idea?  One individual from my team recommended an eyepiece having an exit pupil of 2mm, which this eyepiece gets quite close to.  Also, it has great reviews and it comparatively inexpensive (I suppose this eyepiece is considered middle class?) .  What do you guys think?

Thanks in advance!

Edit: Also considering 8mm one.  What's better?

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Just how many ways are there to locate goals?  What's your favorite?

As a newcomer, one of my greatest concerns was to be sure I'd be able to find things.  I had some success with celebrity hopping with binoculars but once I got my very first telescope I selected a GoTo bracket.  I am very happy with my decision.  But I've since learned other techniques.So I had been wondering as to just how many ways there are to find goals and interested in what people like best.

Here's What I know of so far:

<strong>GoTo</strong> -- fully computerized such as locating and tracking.

<strong>PushTo </strong>-- Computerized aid in finding targets but no tracking

<strong>Star Hopping</strong> -- Start in a bright star then go there and proceed and you should be on it.  (like turn by turn directions in your car) Usually exercised in a paper chart or with a computer software to work out the measures of the hop.  If it is possible to see the guide stars and affirming patterns that this should do the job nicely.

<strong>Setting circles within an equatorial mount</strong> -- Uses Right Ascension and Declination coordinate system that is unique to astronomy -- may read coordinates from a paper graph then use the setting circle dials on the telescope to point the scope.

<strong>Altitude and Azimuth</strong> -- Height above zero angle along with a degree angle from North.  I've tried this using an angle gauge for the elevation component.  I believe this is worked with a real time program on computer or phone to supply the coordinates as these change constantly.

These are the ones that I know of.  Are there others?I have used:

GoTo -- Meade ETX 80 and ETX 125 -- Love it!

PushTo -- Orion Intelliscope- Love it!

Star Hopping -- Most success with binoculars and bright goals.  Less so with my telescopes in the majority of my light polluted skies as I can not see lots of the stars I'd love to see in order to do the hop or to observe the pattern that would affirm I am in the ideal location.

AltAz coordinates -- Tried this recently with an electronic angle gauge for the elevation.  Employed Star hopping to approximate azimuth position.  Don't tried with a compass or an azimuth degree gauge on the extent.

Never attempted setting circle dials in an EQ mount.

Are there others?

Which do you use?

Which would you enjoy?

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Beginners Forum / Semi APO filter for ES ar127
« on: December 23, 2017, 11:09:23 PM »
I have recently obtained a ES ar 127 refractor and wondering about purchasing the Baader semi APO filter, should I purchase the 2" and continue the diagonal or the 1.5" and use to the eyepieces?  I'd love to invest the money wisely, so can anybody lend me their view.

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