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After being away for a long while I've decided to dabble in the DSO imaging (thanks to Neowise for the inspiration).
Currently mulling over a portable mount either Explore scientific iEXOS-100 or iOptron Smart EQ pro+ (at the moment iOptron Skyguider not in contention). Needs to be portable and have goto (i'm rubbish at star hopping).
Therefore need advice on two things:
1) Power pack
One that can support at least 4-5 hours of imaging with the following:
Main Camera - ASI174MM USB 3.0 or ASI 1600MM (at later date) Guide scope camera (ASI120MM) Dew strap x 2 Dew controller - 4 ch Filter wheel ASI Air Mount - hoping this should run off LiPo battery pack (that comes with the mount) for the duration If some of you kind folk could advice on power pack/tank that would be helpful.
Would I also need some sort of power supply regulator to prevent damage to equipment? Budget ~£200
2) Dew Heater strap
I'm getting two - one for main scope and guide scope.
Do I need for main camera and guide scope camera?
ps: I have a skywatcher power pack but that doesn't seem to hold charge.
Any help will be appreciated.
By Mark Hardaker
FOR SALE - My trusty old Celestron NexStar 11 GPS 280mm/11-inch is for sale. Purchased in the USA in 2002 it has served me well. The optics are in perfect order, with two eyepieces and the star diagonal. The tripod is complete and in perfect order. Sadly, the hand controller will no longer drive the mount across the sky. This appears to be only a software issue. I have tried Celestron UK but they cannot fix it, therefore I am selling this beauty "as-is" to any enthusiast who could either defork it and use the optics on a separate equatorial mount and/or use the telescope with manual drive only. Complete with original packaging and handbook.
Call me for more detailed info
Collection only from Verwood, Dorset
£ 700.0 o.n.o
Tel: <contact details removed>
1. If the wire to a pair of 12v DC batteries in series is 10AWG (5.3mm2) and is say 2m in length, what gauge and length wire should join the two batteries, or as long as it is at least 10AWG and less than 2m it is unimportant? Are there issues with using thicker wire to join the two batteries together.
2. And if these two batteries were in parallel, what are the requirements of the wire joining these two batteries together? Again, is using thicker wire than the live and positive to the battery pair problematic?
3. And if you can tolerate answering another question, where would you fuse these two set ups?
If I have one solar panel, and four 12v batteries I need to be charged, two pairs of equal age and capacity (60 amp hour x 2, and 50 amp hour x 2) and the pairs have the same resting voltage and seemingly the same capacity, and I can get a solar charger unit which can charge two batteries (see link below), I was thinking of charging each pair in parallel.
I've read about the risks of charging in parallel, with the weaker battery having the dominant impact and bringing the other battery down to its capacity, but in reality, how likely is this to be a problem in the course of 5 years, where the batteries won't be used that much anyway, maybe discharged 20%, just 10 times a year?
I'm conscious there is scope to discuss lots of things around this, like "buy pairs of new batteries rather than starting out with old ones" and "buy larger capacity new batteries etc", but this is the set up we have and will be sticking with.
Thanks for any replies.
I was hesitant to write this earlier, but I wanted to try all possible ways to get my new SkyWatcher 250P GOTO allgined, but to no avail.
I have followed the instruction manuals of both the synscan and SW, and managed to get the message "alignment successful" multiple times on the handset or the app. The closest I got when I tried to dial a different star was a 20 to 25 degrees off on the azimth axis. Most times it's off by a margin on both axes.
I have tried aligning around 30 times on more than 5 diffrenet occasions, different locations as well. I end up ignoring the thing and switch to navigating manually as the eager friends want to observe instantly, but we ran out of objectes and the planets are not close anymore, so I figured it's time to get deeper DSO's and sort out the GOTO.
Here is what I do:
• I level the scope to the zero reading on top of the base
• I make sure the base is level with a spirit level I bought recently
• I point the scope northish, but latley I bought compass to pinpoint north
• I plug all equipments in and then switch on the power from a lead acid battery
• I enter the date ( US fromat, month before day 😕 )
• enter correct time zone obviously
• the coordinates in the format of E 000 00 , N 00 00
• As for elevation I use "my elevation" app, not sure if it's accurate. Does this entry have to be that accurate?
• I tried both brightest star and the 2 star align methods on the handset (which seems to be the same thing apart from the brightest method having an extra menu asking for which direction you are pointing at)
I even used the synscan app and the synscan pro, and tried the 3 star align method. The app uses location and enters all data automatically
•I use the top and right arrows as the last press before centring the star in the eyepiece as recommended by the manual
These are the steps I follow when I align , is there anythung I missed? Your kind help is much appreciated.
Update: issue solved, check the reply in the second page