Celestron NexStar Evolution
Posted 21 April 2014 - 10:57 AM
Posted 21 April 2014 - 03:02 PM
That said, I still treat these packs with a little more caution and respect compared to NiMH; charge only under supervision and don't physically abuse the pack. I've yet to taken apart the ebay packs (will do soon), but iirc from reading other reports they have on-board low-voltage cut-off and charging circuitry built in.
Posted 21 April 2014 - 03:53 PM
I'm not sure about the eBay batteries but most LiPo have the main discharge wires and the balance cable. This cable is just a wire to each cell in the pack and is necessary for balance charging.
Posted 21 April 2014 - 04:29 PM
I briefly owned an 8se but exchanged it for CPC800. While not the primary reason I exchanged it, the heavier tripod and worm gears ended up being a huge benefit of the CPC800 over the 8se. I would certainly want to use a 2" diagonal, and I currently use one that threads directly to the OTA on my CPC800. If the NS-Evo 9.25 OTA can be moved far enough forward for clearance at zenith, and it as stable as the CPC line, I could see an upgrade (sidegrade?) from CPC800 to NS-Evo9.25.
Posted 21 April 2014 - 04:31 PM
fwiw it was a rather eventful early days for electric R/C LiPo use about a decade ago; quite a few fires on equipment, indoors, garage, vehicles! Still remember ThunderPower's initial claim that their cell-matching assembly didn't require balance charging . Buddy of mine learnt the hard way with 2x 5s packs (10s) powering +1kW outrunners dying an early death.
With LiPo in commercial use like the new Evo mounts, one has to take into account not just the wholesale cost of the batteries, but there's liability issues as well. Hopefully the engineering side of it would have taken care with multiple safety redundancies.
Posted 21 April 2014 - 07:12 PM
Posted 22 April 2014 - 12:28 AM
That's actually what i like about the 6SE on the stock tripod -- i can pick the whole thing up in one piece and carry it somewhere (usually out to the sidewalk). With a little Starizona LiIon battery back (or equivalent) hooked up to it, it'd be even better. But i often wish i had an 8" OTA i could put on it too when i need a little more power.
Is this the battery pack yo are referring to?
They currently sell the Starizona II+ model, which i think is a generation or two beyond the original Pinto model. Hopefully it's a bit safer. At least i've read good things about it. But it's all a moot point, because i don't have any money to buy one anyway. I've got my sights set on an Evolution instead.
Posted 22 April 2014 - 01:18 AM
I know I want either the 8 or the 9.25 but I want to be informed enough to know if the 9.25 is worth it
Posted 22 April 2014 - 02:03 AM
Do you have a link to that pack? I looked on eBay but find too many to evaluate.
The one I picked up last July is this one.
I'd reckon they are probably all from the same, if not similar sources. There isn't any charging instructions; basically plug in, battery pack switch to "on", and charge till the green light switches off. I'm looking to get another pack from a different seller, the ones that are enclosed in a black plastic case.
hmm, on second thot do a search for "18650 12V" - a couple of interesting products using 18650 cells, which should be safer. Not sure about max current draw though.
Posted 22 April 2014 - 08:12 AM
Posted 24 April 2014 - 12:33 PM
Posted 24 April 2014 - 12:51 PM
I can't believe that Celestron would produce a product that requires factory Maintenance periodically. How dumb.
Posted 24 April 2014 - 12:56 PM
Posted 24 April 2014 - 08:07 PM
hamdul: My concerns regardinding how Celestron would deal with battery issues are based on their previous actions related to my need to replace a dead battery in my 17Ah tank and their lack of support regarding a new replacement battery. So yes, I would assume from the start that the battery would not be a user serviceable item. I will be very happy if they thought this issue through when putting this new scope/mount out into the market. Time will tell if this new scope is a winner.
Posted 29 April 2014 - 07:51 PM
Nexstar Evolution batteries are projected to last 10 years
They will be replacable by the users
The telescope is made to function at below minus 10 degree Celcius
I can not wait to get my new scope. A Evolution 6 incher. .
Posted 29 April 2014 - 07:56 PM
We expect lots of pictures (unpacking, first light setup, and maybe even some shots through the scope when you're ready).
Posted 22 May 2014 - 08:36 AM
Posted 22 May 2014 - 09:43 AM
Posted 22 May 2014 - 09:01 PM
Posted 15 June 2014 - 07:22 PM
I have Nexstar 8SE and find it to be a great scope. Of course like all scopes it has it's kinks. The most talked about one is the shakiness of the mount, but I can live with that. You mention that you were considering an Omni XLT 120. I would scratch that in your case. While I love German Equatorial mounts I believe that you'll find it difficult to handle and be able to navigate your way around the sky. You also mention what I believe to be a Nexstar 6SE and while smaller than the 8" would also be a good choice.
As for the Evolution Ah yes the Evolution, I drool every time I see a post regarding one of them. There are several things about them that really grab me. first the gearing. This should reduce a lot of the backlash problems found in the SE series. Next the Lithium battery. This eliminates the use of those Double AA batteries and/or the Power tank and that infernal wire that you have to be so careful of. The alignment procedure using an "I Pad" seems like a breeze. One other point that I'm not sure of is the fact that you can release the gears in altitude thereby being able to balance the tube on the mount and get the balance point more precisely.
Posted 15 June 2014 - 08:25 PM
Why? It won't look any different than what you'll see through an equivalent SE or CPC or AVX or CGEM or CGEPro based scope. The standard Celestron SCT optics are the same no matter what mount ... the only time you'll see a change is when you have an EdgeHD ota.
tyvm nice video wish I could find a video where some 1 shows it looking through the ep. only reference I seem to get is the 8inch se those look great. that will be my only comparison that I know
The Evolution will be smoother in operation than the SE, that will make it a better platform for imaging at shorter exposures in alt az mode and with longer exposures in EQ mode. Solar system imaging will be equivalent to a properly setup SE scope. With it's slightly heavier components it should have a little more stability that the SE (seen as less "jittery" when focusing) and with it's better gears should also have a little less backlash (also perceived as smoother operations).
Goto accuracy shouldn't be much different than a well setup SE ... although the Evolution should be a bit less sensitive to a less careful setup.