Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - Davids

Pages: [1] 2
1
Seeing was pretty bad last night, but I did get one shot that shows the two shadows pretty clearly.

2
Pretty cool, just wish the seeing was better tonight here in Santa Rosa.

3
TAC Imaging / Re: Lunar imaging question
« on: April 26, 2017, 03:14:37 PM »
Oops, got to stop using alternative math.  I wasn't far off your exposure time then.  I guess I'll just have to play with gain versus exposure some more.  I could try a neutral density filter also, I have one that I use for visual observing, maybe that will help.

Dave

4
TAC Imaging / Re: Lunar imaging question
« on: April 26, 2017, 03:03:24 PM »
I'm using Firecapture for camera control and it only gives me a gain control number from 1 to 100 and exposure times in milliseconds.  Based on your recommendation of 1/200th, that works out to an exposure of 300 milliseconds.

The shot I posted was done with a gain of 38 (38%) and exposure time of 4.125 milli seconds.  So it looks like to duplicate what you are talking about, I should drop the gain to about 4 and increase the exposure time to about 300 mSec.

I'll give that a try.  I'm glad I didn't wait to get this camera...the learning curve has been a bit steep for me.

Cheers,

Dave

5
TAC Imaging / Lunar imaging question
« on: April 26, 2017, 02:22:39 PM »
Hi All,

I picked up an ASI130MM camera recently to use for the eclipse in August.  I figured I might as well practice on the moon also.  My question regards exposure time vs. gain and how to avoid washing out the brightest features.  I got this shot that turned out ok, but Copernicus and Aristarchus are over exposed and the other images I have during the same session that aren't just don't have the same detail (I know it could be seeing). 

I'm using a C8 (note to self, get a Crayford focuser), AutoStakkert for Stacking, and Registax 6 for wavelet processing.

Any suggestions are very welcome.

Cheers,

Dave

6
TAC Visual / Re: Transit of Mercury on May 9th. Where to view?
« on: April 28, 2016, 12:49:27 PM »
I'm just going to set up white light and H-alpha scopes in the parking lot at work in Petaluma.  Just hope there is no fog on the 9th.

Cheers,

Dave

7
TAC Visual / Re: Dancing planets in the AM
« on: November 04, 2015, 02:11:25 PM »
I've been watching this for a few weeks.  My daughter ice skates in the early morning and we're on the road by 5:40.  It's been pretty and pretty cool.

Dave

8
TAC Visual / Re: 2017 Total Eclipse
« on: October 31, 2014, 03:25:59 PM »
Never mind I found it.

Here is the URL to Terreton Id.  http://goo.gl/LnXPXN

9
TAC Visual / Re: 2017 Total Eclipse
« on: October 31, 2014, 02:03:07 PM »
How did you get that URL for Google maps.  I was looking for parking lots, parks, schools or churches near the centerline and found what looks to be a prime spot less than a mile from centerline in Terreton Id.  It's just north of Idaho Falls off I15.  There are 2 options, West Jefferson High School and an LDS church right across the street from the school.  Totality looks like it would be almost 2:18 at those locations.

I'll post a link if you can tell me how you got that short link.

Cheers,

Dave

10
TAC Visual / Re: 2017 Total Eclipse
« on: October 29, 2014, 03:33:50 PM »
I'll be going to Idaho.  My home town is Idaho Falls and there plenty of options along the center line without having to do any camping and weather is usually pretty clear that time of year.

Cheers,

Dave

11
Observing Reports / The Sun this afternoon 8/27
« on: August 27, 2014, 01:48:46 PM »
Spent an enjoyable hour observing the Sun this afternoon.  Lots of detail on the surface, the filaments looked like someone with a bunch of badly healed scars.  In my scope 3 spots formed a right triangle in the center with the hypotenuse to the right...all of that to say where the prominences that I saw were located.  There was a nice little grouping of them between 3 and 4 o'clock, based on my orientation.  I think that would make it the east limb, but I'm not sure.

I set up at work with my AT-80/Lunt LS50Ha piggybacked on my C8 out in the parking lot.  It's fun because I get to share views with a bunch of my coworkers as they head to and from lunch.

Cheers,

Dave

12
TAC Imaging / Re: New Image: Crescent and the Soap Bubble
« on: August 21, 2014, 10:55:51 AM »
Very nice, no wonder the Soap Bubble wasn't discovered until 2008.

13
Observing Sites / Re: Lake Sonoma
« on: August 19, 2014, 04:38:46 PM »
I wasn't criticizing,  I don't think the Lake Sonoma page ever had the clock link.  No worries, just thought people would find it useful.

14
Observing Sites / Re: Lake Sonoma
« on: August 19, 2014, 08:24:57 AM »
Link to the Lake Sonoma clear sky clock:
http://cleardarksky.com/c/SonomaCAkey.html

15
Observing Intents / OI: Lake Sonoma Saturday 8/23
« on: August 19, 2014, 08:20:13 AM »
I plan to be at Lone Rock somewhere between 7:30 and 8pm. 

Hope to see others there.

Cheers,

Dave

Pages: [1] 2