M4, NGC6144 and a messy Carina

mswhin63 (Malcolm) · #1 24-06-2011, 08:29 PM

Hi all,

I will need to do a re-grease on the mount, found that every couple of minute the mount jumps a couple of arc seconds causing poor tracking. Apart from that concentrating on short exposure imaging for the moment.

The scope fogged up on Carina after the first 5 shots and didn't realise until after I completed 30 exposures.

If anyone want to see high rez, need to wait as my son me not to upload any images until he has finished. Clogs up the IP traffic.

30seconds @ 1600 ISO

Ross G · #2 24-06-2011, 10:14 PM

Nice shots Malcolm.

I particularly like your Eta C.

Thanks.

Ross.

mswhin63 (Malcolm) · #3 29-06-2011, 09:51 AM

Hi,

Managed to get the hi rez version of of ETA Carina uploaded if anyone is interested.

Took new shot couple of nights ago and looks like will be a break from shooting until the weather clears. Also managed to improve the mounts guiding capability and took the latest one with 1 minute lights.

http://www.waelect.com.au/mswhin63/D...26_NGC3372.png

bojan · #4 29-06-2011, 10:03 AM

Quote:

Originally Posted by mswhin63

Hi all,

I will need to do a re-grease on the mount, found that every couple of minute the mount jumps a couple of arc seconds causing poor tracking.

This could be because of poor balancing... it should be either perfect or slightly against the tracking direction.
If the balance "hangs" in the direction of tracking, you will have the effect you described.

mswhin63 (Malcolm) · #5 29-06-2011, 10:53 AM

Quote:

Originally Posted by bojan

This could be because of poor balancing... it should be either perfect or slightly against the tracking direction.
If the balance "hangs" in the direction of tracking, you will have the effect you described.

Thanks Bojan - I bought the mount secondhand and I carried out a major grease up and replaced 2 bearings. I am going to replace the other 2 later I only noticed the grittiness of 2 bearings on the declination axis after already completing the other axis. Quite easy to repair these mounts too, I also believe that my power connections are a bit sus so will be replacing the whole power cable and adapters at the same time. Hopefully enough time today.